157-439: The Messerschmitt-Bölkow-Blohm Bo 105 is a light, twin-engine, multi-purpose helicopter developed by Bölkow of Ottobrunn , West Germany. It was the first light twin-engine helicopter in the world, and the first rotorcraft that could perform aerobatic maneuvers such as inverted loops. The Bo 105 features a hingeless rotor system, a pioneering innovation in helicopters when it was introduced into service in 1970. Production of
314-616: A runway . In 1942, the Sikorsky R-4 became the first helicopter to reach full-scale production . Although most earlier designs used more than one main rotor, the configuration of a single main rotor accompanied by a vertical anti-torque tail rotor (i.e. unicopter , not to be confused with the single-blade monocopter ) has become the most common helicopter configuration. However, twin-rotor helicopters (bicopters), in either tandem or transverse rotors configurations, are sometimes in use due to their greater payload capacity than
471-531: A special autonomous status ( otonomi khusus ) from the central government. Aceh, a conservative Islamic territory , has the right to create some aspects of an independent legal system implementing sharia . Yogyakarta is the only pre-colonial monarchy legally recognised within Indonesia, with the positions of governor and vice governor being prioritised for the reigning Sultan of Yogyakarta and Duke of Pakualaman , respectively. The six Papuan provinces are
628-444: A collective input is made, all the blades change equally, and the result is the helicopter increasing or decreasing in altitude. A swashplate controls the collective and cyclic pitch of the main blades. The swashplate moves up and down, along the main shaft, to change the pitch of both blades. This causes the helicopter to push air downward or upward, depending on the angle of attack . The swashplate can also change its angle to move
785-588: A combination of light weight and the twin-engined configuration enables a rapid ascent in a performance takeoff. Perhaps the most significant feature of the Bo 105 is its rotor blades and rotor head. The rotor system is entirely hingeless , the rotor head consisting of a solid titanium block to which the four blades are bolted; the flexibility of the rotor blades works to absorb movements typically requiring hinges in most helicopter rotor designs. The rotor blades are made from reinforced-plastic glass-fiber composite material;
942-417: A constant altitude. The pedals serve the same function in both a helicopter and a fixed-wing aircraft, to maintain balanced flight. This is done by applying a pedal input in whichever direction is necessary to center the ball in the turn and bank indicator . Due to the operating characteristics of the helicopter—its ability to take off and land vertically, and to hover for extended periods of time, as well as
1099-462: A dividing line ( Wallace Line ) between the distribution of Indonesia's Asian and Australasian species. It runs roughly north–south along the edge of the Sunda Shelf, between Kalimantan and Sulawesi, and along the deep Lombok Strait , between Lombok and Bali. Flora and fauna on the west of the line are generally Asian, while east from Lombok is increasingly Australian until the tipping point at
1256-591: A few more flights and achieved a height of nearly 2.0 metres (6.5 ft), but it proved to be unstable and was abandoned. Indonesia Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania , between the Indian and Pacific oceans. It consists of over 17,000 islands , including Sumatra , Java , Sulawesi , and parts of Borneo and New Guinea . Indonesia
1413-400: A flight profile could pose to pilots. When outfitted with optional auxiliary fuel tanks, a basic model Bo 105 had a flight endurance of roughly five hours under load. In the event of a single engine failure, the Bo 105 could typically continue its flight, albeit with a reduction in cruise speed and range. Besides the two pilots, the cabin can be configured to accommodate up to three passengers on
1570-463: A gift by their father, would inspire the Wright brothers to pursue the dream of flight. In 1861, the word "helicopter" was coined by Gustave de Ponton d'Amécourt , a French inventor who demonstrated a small steam-powered model. While celebrated as an innovative use of a new metal, aluminum, the model never lifted off the ground. D'Amecourt's linguistic contribution would survive to eventually describe
1727-405: A helicopter determines the size, function and capability of that helicopter design. The earliest helicopter engines were simple mechanical devices, such as rubber bands or spindles, which relegated the size of helicopters to toys and small models. For a half century before the first airplane flight, steam engines were used to forward the development of the understanding of helicopter aerodynamics, but
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#17327874736591884-510: A helicopter powered by a gasoline engine with box kites attached to a mast by cables for a rotor, but it never flew. In 1906, two French brothers, Jacques and Louis Breguet , began experimenting with airfoils for helicopters. In 1907, those experiments resulted in the Gyroplane No.1 , possibly as the earliest known example of a quadcopter. Although there is some uncertainty about the date, sometime between 14 August and 29 September 1907,
2041-416: A helicopter. This is because a helicopter generates its own gusty air while in a hover, which acts against the fuselage and flight control surfaces. The result is constant control inputs and corrections by the pilot to keep the helicopter where it is required to be. Despite the complexity of the task, the control inputs in a hover are simple. The cyclic is used to eliminate drift in the horizontal plane, that
2198-720: A legislature ( DPRD Kabupaten/Kota ). The third level are the districts ( kecamatan , distrik in Papua , or kapanewon and kemantren in Yogyakarta ), and the fourth are the villages (either desa , kelurahan , kampung , nagari in West Sumatra , or gampong in Aceh ). The village is the lowest level of government administration. It is divided into several community groups ( rukun warga , RW), which are further divided into neighbourhood groups ( rukun tetangga , RT). In Java,
2355-487: A longer term target to further increase the coverage of its marine protected areas to 10% of its territorial waters, or 31 million hectares. Indonesia is a republic with a presidential system. Following the fall of the New Order in 1998, political and governmental structures have undergone sweeping reforms, with four constitutional amendments revamping the executive, legislative and judicial branches. Chief among them
2512-545: A press bureau in the Netherlands, Indonesisch Pers-bureau . Fossilised remains of Homo erectus , popularly known as the " Java Man ", suggest the Indonesian archipelago was inhabited two million to 500,000 years ago. Homo sapiens reached the region around 43,000 BCE. Austronesian peoples , who form the majority of the modern population, migrated to Southeast Asia from what is now Taiwan. They arrived in
2669-477: A process of rebracketing , the word is often (erroneously, from an etymological point of view) perceived by English speakers as consisting of heli- and -copter , leading to words like helipad and quadcopter . English language nicknames for "helicopter" include "chopper", "copter", "heli", and "whirlybird". In the United States military, the common slang is "helo" pronounced /ˈhiː.loʊ/. A helicopter
2826-478: A range of sea and coastal ecosystems, including beaches , dunes, estuaries, mangroves, coral reefs, seagrass beds, coastal mudflats, tidal flats, algal beds, and small island ecosystems. Indonesia is one of the Coral Triangle countries with the world's most enormous diversity of coral reef fish , with more than 1,650 species in eastern Indonesia only. British naturalist Alfred Russel Wallace described
2983-434: A reputation for having high levels of maneuverability; certain variants have been designed for aerobatic maneuvers and used for promotional purposes by operators, one such operator in this capacity being professional pilot Aaron Fitzgerald , flying for Red Bull . During the 1970s, the Bo 105 was known for having a great useful load capacity and higher cruise speed than the majority of its competitors. While not being considered
3140-494: A rotor. The spinning creates lift, and the toy flies when released. The 4th-century AD Daoist book Baopuzi by Ge Hong ( 抱朴子 "Master who Embraces Simplicity") reportedly describes some of the ideas inherent to rotary wing aircraft. Designs similar to the Chinese helicopter toy appeared in some Renaissance paintings and other works. In the 18th and early 19th centuries Western scientists developed flying machines based on
3297-441: A single main rotor, but torque created by its aerodynamic drag must be countered by an opposed torque. The design that Igor Sikorsky settled on for his VS-300 was a smaller tail rotor. The tail rotor pushes or pulls against the tail to counter the torque effect, and this has become the most common configuration for helicopter design, usually at the end of a tail boom . Some helicopters use other anti-torque controls instead of
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#17327874736593454-521: A single rear bench, which can be removed to make room for cargo or a stretcher, which can be loaded and unloaded via the large clamshell doors located at the rear of the fuselage. In a maritime context, the BO 105 can be equipped with auxiliary fuel tanks , emergency flotation equipment, an inflatable life raft , folding rotor blades and high skid landing gear. In 1975, the German Army decided to procure
3611-554: A specialist anti-tank version armed with up to six Euromissile HOT missiles, designated as the Bo 105 PAH-1 (Panzerabwehrhubschrauber: antiarmor helicopter). A total of 212 Bo 105 PAH-1s were delivered between 1979 and 1984. German Army leaders saw the PAH-1 as a temporary measure only, having originally sought a more capable anti-tank helicopter; they were particularly dissatisfied with the PAH-1's inability to perform nighttime combat missions and its self-protection capabilities; ultimately,
3768-417: A state called translational lift which provides extra lift without increasing power. This state, most typically, occurs when the airspeed reaches approximately 16–24 knots (30–44 km/h; 18–28 mph), and may be necessary for a helicopter to obtain flight. In forward flight a helicopter's flight controls behave more like those of a fixed-wing aircraft. Applying forward pressure on the cyclic will cause
3925-484: A visually attractive helicopter by some pilots, the Bo 105 was known for possessing steady, responsive controls and a good flight attitude. Most models could perform steep dives, rolls, loops, turnovers, and various aerobatic maneuvers; according to MBB the Bo 105 is cleared for up to 3.5 positive G force and one negative. One benefit of the Bo 105's handling and control style is superior takeoff performance, including significant resistance to catastrophic dynamic rollover ;
4082-520: A wealth of Asian fauna. Large species such as the Sumatran tiger , rhinoceros, orangutan, Asian elephant , and leopard were once abundant as far east as Bali, but numbers and distribution have dwindled drastically. Having been long separated from the continental landmasses, Sulawesi, Nusa Tenggara, and Maluku have developed their unique flora and fauna. Papua was part of the Australian landmass and
4239-569: Is US$ 15,835, while nominal per capita GDP is US$ 5,108. Services are the economy's largest sector and account for 43.4% of GDP (2018), followed by industry (39.7%) and agriculture (12.8%). Since 2009, it has employed more people than other sectors, accounting for 47.7% of the total labour force, followed by agriculture (30.2%) and industry (21.9%). Over time, the structure of the economy has changed considerably. Historically, it has been weighted heavily towards agriculture, reflecting both its stage of economic development and government policies in
4396-429: Is a cylindrical metal shaft that extends upwards from the transmission. At the top of the mast is the attachment point for the rotor blades called the hub. Main rotor systems are classified according to how the rotor blades are attached and move relative to the hub. There are three basic types: hingeless, fully articulated, and teetering; although some modern rotor systems use a combination of these. Most helicopters have
4553-649: Is a founding member of the Association of Southeast Asian Nations ( ASEAN ) and the East Asia Summit . In common with most of the Muslim world , Indonesia does not have diplomatic relations with Israel and has actively supported Palestine . However, observers have pointed out that Indonesia has ties with Israel, albeit discreetly. Indonesia has been a member of the United Nations since 1950 and
4710-460: Is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors . This allows the helicopter to take off and land vertically , to hover , and to fly forward, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of short take-off and landing ( STOL ) or short take-off and vertical landing ( STOVL ) aircraft cannot perform without
4867-452: Is a type of rotorcraft in which lift and thrust are supplied by one or more horizontally-spinning rotors. By contrast the autogyro (or gyroplane) and gyrodyne have a free-spinning rotor for all or part of the flight envelope, relying on a separate thrust system to propel the craft forwards, so that the airflow sets the rotor spinning to provide lift. The compound helicopter also has a separate thrust system, but continues to supply power to
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5024-404: Is believed to have caused a global volcanic winter and cooling of the climate and subsequently led to a genetic bottleneck in human evolution, though this is still in debate. The 1815 eruption of Mount Tambora and the 1883 eruption of Krakatoa were among the largest in recorded history. The former caused 92,000 deaths and created an umbrella of volcanic ash that spread and blanketed parts of
5181-452: Is called an aerial crane . Aerial cranes are used to place heavy equipment, like radio transmission towers and large air conditioning units, on the tops of tall buildings, or when an item must be raised up in a remote area, such as a radio tower raised on the top of a hill or mountain. Helicopters are used as aerial cranes in the logging industry to lift trees out of terrain where vehicles cannot travel and where environmental concerns prohibit
5338-536: Is elected for a five-year term, as are the party-aligned members of the DPR and the non-partisan DPD. Beginning with the 2015 local elections , elections for governors and mayors have occurred on the same date. In 2014, the Constitutional Court ruled that legislative and presidential elections would be held simultaneously, starting in 2019. Indonesia has several levels of subdivisions. The first level are
5495-547: Is equipped to stabilize and provide limited medical treatment to a patient while in flight. The use of helicopters as air ambulances is often referred to as " MEDEVAC ", and patients are referred to as being "airlifted", or "medevaced". This use was pioneered in the Korean War , when time to reach a medical facility was reduced to three hours from the eight hours needed in World War II , and further reduced to two hours by
5652-403: Is generally below average in both regional and global context. Indonesia has one of the world's fastest deforestation rates. In 2020, forests covered approximately 49.1% of the country's land area, down from 87% in 1950. Since the 1970s, log production, various plantations and agriculture have been responsible for much of the deforestation in Indonesia . Most recently, it has been driven by
5809-754: Is highly unstable, making it a site of numerous volcanoes and frequent earthquakes. It lies on the Pacific Ring of Fire , where the Indo-Australian Plate and the Pacific Plate are pushed under the Eurasian Plate , where they melt at about 100 kilometres (62 miles) deep. A string of volcanoes runs through Sumatra, Java , Bali and Nusa Tenggara , and then to the Banda Islands of Maluku to northeastern Sulawesi . Of
5966-495: Is home to a unique fauna and flora closely related to that of Australia, including over 600 bird species. Indonesia is second only to Australia in terms of total endemic species, with 36% of its 1,531 species of bird and 39% of its 515 species of mammal being endemic. Indonesia harbours 83% of Southeast Asia's old-growth forest , and the highest amount of forest carbon in the region. Tropical seas surround Indonesia's 80,000 kilometres (50,000 miles) of coastline. The country has
6123-563: Is some policy recognition of OECMs but no national mechanism for reporting them. There are 55 national parks in Indonesia, of which 9 are predominantly marine . Of these 6 are World Heritage Sites , such as the Tropical Rainforest Heritage of Sumatra that includes three parks. Seven national parks are part of the World Network of Biosphere Reserves and 5 are wetlands of international importance under
6280-678: Is the Sud-Ouest Djinn , and an example of the hot tip jet helicopter is the YH-32 Hornet . Some radio-controlled helicopters and smaller, helicopter-type unmanned aerial vehicles , use electric motors or motorcycle engines. Radio-controlled helicopters may also have piston engines that use fuels other than gasoline, such as nitromethane . Some turbine engines commonly used in helicopters can also use biodiesel instead of jet fuel. There are also human-powered helicopters . A helicopter has four flight control inputs. These are
6437-555: Is the delegation of power and authority to various regional entities while remaining a unitary state . The President of Indonesia is the head of state and head of government , commander-in-chief of the Indonesian National Armed Forces ( Tentara Nasional Indonesia , TNI), and the director of domestic governance, policy-making, and foreign affairs. The president may serve a maximum of two consecutive five-year terms. The highest representative body at
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6594-483: Is the world's second-most-populous urban area . Indonesia shares land borders with Papua New Guinea , East Timor , and the eastern part of Malaysia , as well as maritime borders with Singapore , Peninsular Malaysia , Vietnam , Thailand , the Philippines , Australia , Palau , and India . Despite its large population and densely populated regions, Indonesia has vast areas of wilderness that support one of
6751-552: Is the world's largest archipelagic state and the 14th-largest country by area , at 1,904,569 square kilometres (735,358 square miles). With over 280 million people, Indonesia is the world's fourth-most-populous country and the most populous Muslim-majority country . Java, the world's most populous island , is home to more than half of the country's population. Indonesia is a presidential republic with an elected legislature . It has 38 provinces , of which nine have special autonomous status . The country's largest city, Jakarta ,
6908-411: Is to control forward and back, right and left. The collective is used to maintain altitude. The pedals are used to control nose direction or heading . It is the interaction of these controls that makes hovering so difficult, since an adjustment in any one control requires an adjustment of the other two, creating a cycle of constant correction. As a helicopter moves from hover to forward flight it enters
7065-404: The 1999 East Timorese crisis and the Papua conflict . Indonesian Bo 105s have also participated in several large-scale joint exercises. The Mexican Navy operated a number of armed Bo 105s to perform maritime reconnaissance duties; during the early 1980s, Mexico procured a number of a Uribe-class patrol vessels which were equipped to handle the Bo 105 for off-shore operations. In 2005, work
7222-426: The 2006 Yogyakarta earthquake . Indonesia's size, tropical climate, and archipelagic geography support one of the world's highest levels of biodiversity , and it is among the 17 megadiverse countries identified by Conservation International . Its flora and fauna are a mixture of Asian and Australasian species. The Sunda Shelf islands (Sumatra, Java, Borneo, and Bali) were once linked to mainland Asia and have
7379-639: The Army (TNI–AD), Navy (TNI–AL, which includes Marine Corps ), and Air Force (TNI–AU). The army has about 400,000 active-duty personnel. Defence spending in the national budget was 0.7% of gross domestic product (GDP) in 2018, with controversial involvement of military-owned commercial interests and foundations. The Armed Forces were formed during the Indonesian National Revolution when it undertook guerrilla warfare along with informal militia. Since then, territorial lines have formed
7536-495: The Bali myna , Sumatran orangutan , and Javan rhinoceros . Some academics describe the deforestation and other environmental destruction in the country as an ecocide . As of 2023, the government of Indonesia has gazetted 21.3% of the country's land as protected areas , with the intention of developing a new protected area strategy in line with global post-2020 framework . The country also has 411 marine reserves , or 9% of
7693-572: The Bell 205 and the Erickson S-64 Aircrane helitanker. Helicopters are used as air ambulances for emergency medical assistance in situations when an ambulance cannot easily or quickly reach the scene, or cannot transport the patient to a medical facility in time. Helicopters are also used when patients need to be transported between medical facilities and air transportation is the most practical method. An air ambulance helicopter
7850-588: The Bell 206 with 3,400. Most were in North America with 34.3% then in Europe with 28.0% followed by Asia-Pacific with 18.6%, Latin America with 11.6%, Africa with 5.3% and Middle East with 1.7%. The earliest references for vertical flight came from China. Since around 400 BC, Chinese children have played with bamboo flying toys (or Chinese top). This bamboo-copter is spun by rolling a stick attached to
8007-611: The Constitutional Court ( Mahkamah Konstitusi ) which listens to constitutional and political matters, and the Religious Court ( Pengadilan Agama ), which deals with codified Islamic Personal Law ( sharia ) cases. Additionally, the Judicial Commission ( Komisi Yudisial ) monitors the performance of judges. Since 1999, Indonesia has had a multi-party system. In all legislative elections since
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#17327874736598164-471: The Consumer Price Index have contributed to strong economic growth in recent years. From 2007 to 2019, annual growth accelerated to between 4% and 6% due to improvements in the banking sector and domestic consumption, helping Indonesia weather the 2008–2009 Great Recession , and regain in 2011 the investment grade rating it had lost in 1997. As of 2019 , 9.41% of the population lived below
8321-527: The Cornu helicopter which used two 6.1-metre (20 ft) counter-rotating rotors driven by a 24 hp (18 kW) Antoinette engine. On 13 November 1907, it lifted its inventor to 0.3 metres (1 ft) and remained aloft for 20 seconds. Even though this flight did not surpass the flight of the Gyroplane No. 1, it was reported to be the first truly free flight with a pilot. Cornu's helicopter completed
8478-659: The Eurocopter Tiger was developed as a replacement. In 1977, the German Ministry of Defence selected the Bo 105C for its light observation helicopter (VBH) program, leading to the procurement of another 100 rotorcraft. The helicopter was retired from German Army service on 13 December 2016, the occasion was marked by an 18-aircraft formation flyby from their base in Celle . The Bohicans, as their pilots were called, had clocked over 1.38 million flying hours. During
8635-617: The Japanese invasion and occupation ended Dutch rule and encouraged the independence movement. Two days after the surrender of Japan in August 1945, influential nationalist leaders Sukarno and Mohammad Hatta issued the Proclamation of Indonesian Independence . Sukarno, Hatta, and Sutan Sjahrir were appointed president, vice-president, and prime minister, respectively. The Netherlands attempted to re-establish their rule. In
8792-733: The Maluku Islands . Dutch and British traders followed. In 1602, the Dutch established the Dutch East India Company ( Verenigde Oostindische Compagnie ; VOC) and became the dominant European power for almost 200 years. The VOC was dissolved in 1799 following bankruptcy, and the Netherlands established the Dutch East Indies as a nationalised colony. For most of the colonial period , Dutch control over
8949-512: The Organisation of Islamic Cooperation . The name Indonesia derives from the Greek words Indos ( Ἰνδός ) and nesos ( νῆσος ), meaning "Indian islands". The name dates back to the 19th century, far predating the formation of independent Indonesia. In 1850, George Windsor Earl , an English ethnologist , proposed the terms Indunesians —and, his preference, Malayunesians —for
9106-556: The Prosperous Justice Party (PKS). The first general election was held in 1955 to elect members of the DPR and the Constitutional Assembly ( Konstituante ). The most recent elections in 2019 resulted in nine political parties in the DPR, with a parliamentary threshold of 4% of the national vote. At the national level, Indonesians did not elect a president until 2004. Since then, the president
9263-529: The Ramsar convention . Around 9% of the Indonesia surface are national parks. As of 2012 Indonesia had over 100 marine protected areas covering an area of 15.7 million ha, of which 32 where managed by the Ministry of Forestry while the rest where managed by local governments. In 2009 the president Susilo Bambang Yudhoyono declared a target of reaching 20 million hectares by 2020. In 2010 Indonesia also set out
9420-548: The Republic of Korea Army aviation procured a number of Bo 105s as part of an ongoing drive to improve the force's reconnaissance and surveillance capabilities; these were manufactured under a co-production arrangement between Eurocopter and the newly formed Korea Aerospace Industries (KAI), receiving the designation Korean Light Helicopter (KLH), KAI also promoted the type to export customers. The Bo 105 gained widespread use by emergency medical service (EMS) / medevac operators; in 1998, Flying Magazine reported that between
9577-715: The UNHRC have raised the issue of human rights abuses committed by Indonesian troops in Papua such as extrajudicial killings and forced disappearances. Past engagements of the army include the conflict against the Netherlands over the Dutch New Guinea , the opposition to the British -sponsored creation of Malaysia (" Konfrontasi "), the mass killings of the Indonesian Communist Party (PKI), and
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#17327874736599734-499: The Vietnam War . In naval service a prime function of rescue helicopters is to promptly retrieve downed aircrew involved in crashes occurring upon launch or recovery aboard aircraft carriers. In past years this function was performed by destroyers escorting the carrier, but since then helicopters have proved vastly more effective. Police departments and other law enforcement agencies use helicopters to pursue suspects and patrol
9891-489: The Weber Line . In his 1869 book, The Malay Archipelago , Wallace described numerous species unique to the area. The region of islands between his line and New Guinea is now termed Wallacea . Indonesia's large and growing population and rapid industrialisation present serious environmental issues . They are often given a lower priority due to high poverty levels and weak, under-resourced governance. Problems include
10048-682: The invasion of East Timor , the latter having been Indonesia's most massive military operation. Indonesia has a mixed economy in which the private sector and government play vital roles. As the only G20 member state in Southeast Asia, the country has the largest economy in the region and is classified as a newly industrialised country . Per a 2023 estimate, it is the world's 16th largest economy by nominal GDP and 7th in terms of GDP at PPP , estimated to be US$ 1.417 trillion and US$ 4.393 trillion, respectively. Per capita GDP in PPP
10205-436: The palm oil industry, which has been criticised for its environmental impact and displacement of local communities. The situation has made Indonesia the world's largest forest-based emitter of greenhouse gases. It also threatens the survival of indigenous and endemic species. The International Union for Conservation of Nature (IUCN) identified 140 species of mammals as threatened and 15 as critically endangered, including
10362-436: The provinces , which have a legislature ( Dewan Perwakilan Rakyat Daerah , DPRD) and an elected governor . A total of 38 provinces have been established from the original eight in 1945, the most recent change being the split of Southwest Papua from the province of West Papua in 2022. The second level are the regencies ( kabupaten ) and cities ( kota ), led by regents ( bupati ) and mayors ( walikota ), respectively, and
10519-410: The tropical rainforest climate found on every large island of Indonesia. Cooler climate types exist in mountainous regions that are 1,300 to 1,500 metres (4,300 to 4,900 feet) above sea level. The oceanic climate (Köppen Cfb ) prevails in highland areas adjacent to rainforest climates, with uniform precipitation year-round. In highland areas near the tropical monsoon and tropical savanna climates ,
10676-554: The world's highest levels of biodiversity . The Indonesian archipelago has been a valuable region for trade since at least the seventh century, when Sumatra's Srivijaya and later Java's Majapahit kingdoms engaged in commerce with entities from mainland China and the Indian subcontinent . Over the centuries, local rulers assimilated foreign influences, leading to the flourishing of Hindu and Buddhist kingdoms. Sunni traders and Sufi scholars later brought Islam , and European powers fought one another to monopolise trade in
10833-413: The 1950s and 1960s to promote agricultural self-sufficiency. A gradual process of industrialisation and urbanisation began in the late 1960s and accelerated in the 1980s as falling oil prices saw the government focus on diversifying away from oil exports and towards manufactured exports. This development continued throughout the 1980s and into the next decade despite the 1990 oil price shock , during which
10990-462: The 1970s, MBB issued a license to produce the Bo 105 to Indonesian Aerospace (IPTN) as part of a wider agreement to help develop Indonesia's aviation industry. Within ten years, manufacture of the Bo 105 had been entirely localised within IPTN's own facilities. The Bo 105 has been used by various branches of the Indonesian National Armed Forces ; military-operated Bo 105s have been reportedly used during
11147-411: The 400 volcanoes, around 130 are active. Between 1972 and 1991, there were 29 volcanic eruptions, mostly on Java. Volcanic ash has made agricultural conditions unpredictable in some areas. However, it has also resulted in fertile soils, a factor in historically sustaining the high population densities of Java and Bali. A massive supervolcano erupted at present-day Lake Toba around 70,000 BCE. It
11304-558: The Bambi bucket, are usually filled by submerging the bucket into lakes, rivers, reservoirs, or portable tanks. Tanks fitted onto helicopters are filled from a hose while the helicopter is on the ground or water is siphoned from lakes or reservoirs through a hanging snorkel as the helicopter hovers over the water source. Helitack helicopters are also used to deliver firefighters, who rappel down to inaccessible areas, and to resupply firefighters. Common firefighting helicopters include variants of
11461-787: The Bo 105 and the MBB/Kawasaki BK 117 (a newer rotorcraft derived from the Bo 105), MBB held 35% of the EMS market share. The first EMS-orientated Bo 105 in Scotland entered service in 1989; in November 2015, the last Bo 105 air ambulance operated in Britain was retired, the type having typically been replaced by the newer Eurocopter EC135 . In 2009, the last Bo 105 to be produced was purchased by Canadian EMS specialist Dam Helicopters . In May 2014, Airbus Helicopter reported that, worldwide,
11618-615: The Bo 105 began at the then-recently merged Messerschmitt-Bölkow-Blohm (MBB). The main production facilities for producing the Bo 105 were located in Germany and Canada; due to the level of export sales encountered, additional manufacturing lines were set up in Spain, Indonesia, and the Philippines. MBB, acquired by DASA in 1989, merged its helicopter division with that of France's Aérospatiale to form Eurocopter in 1992 (rebranded Airbus Helicopters since). The latter continued production of
11775-509: The Bo 105 by Eurocopter formally ended in 2001, principally due to the type having been superseded by the more modern Eurocopter EC135 , itself a direct development from the Bo 105. By the end of production, 1,406 rotorcraft had been manufactured and delivered to operators in 55 nations worldwide. Including the license production in Canada, Indonesia, Philippines and Spain the total is about 1640; of that 1404 were made in Germany. The Bo 105 has
11932-556: The Bo 105 had accumulated 8 million flight hours, and that approximately 700 Bo 105s remained in service. The variants used by the German Army are the Bo 105P and Bo 105M. Data from Jane's All the World's Aircraft 1988-89 Worldwide Equipment Guide – Volume 2: Airspace and Air Defense Systems General characteristics Performance Armament Related development Aircraft of comparable role, configuration, and era Related lists Helicopter A helicopter
12089-402: The Bo 105C, was developed; this model quickly superseded the Bo 105A. On 25 September 1973, the prototype Bo 106 performed its first flight; the Bo 106 shared many similarities to the Bo 105, the principal difference being a widened cabin area, capable of seating three abreast in the front row and four abreast in the rear of the cabin. However, nothing further came of the Bo 106 project. In 1976,
12246-522: The Bo 105CB, equipped with more powerful Allison 250-C20B engines, was introduced. The Bo 105C was further developed to become the Bo 105CBS, the primary change being a fuselage stretch of 10 inches to meet American demand for emergency medical service (EMS) operations; this version was often referred to as the Bo 105 Twin Jet in the United States. US aerospace firm Boeing-Vertol served as a partner in
12403-762: The Chinese top in a model consisting of contrarotating turkey flight feathers as rotor blades, and in 1784, demonstrated it to the French Academy of Sciences . Sir George Cayley , influenced by a childhood fascination with the Chinese flying top, developed a model of feathers, similar to that of Launoy and Bienvenu, but powered by rubber bands. By the end of the century, he had progressed to using sheets of tin for rotor blades and springs for power. His writings on his experiments and models would become influential on future aviation pioneers. Alphonse Pénaud would later develop coaxial rotor model helicopter toys in 1870, also powered by rubber bands. One of these toys, given as
12560-478: The Chinese toy. It was not until the early 1480s, when Italian polymath Leonardo da Vinci created a design for a machine that could be described as an " aerial screw ", that any recorded advancement was made towards vertical flight. His notes suggested that he built small flying models, but there were no indications for any provision to stop the rotor from making the craft rotate. As scientific knowledge increased and became more accepted, people continued to pursue
12717-580: The Cold War. Numerous attempts by the United States and the Soviet Union , and China to some degree, culminated in the 1965 coup attempt and subsequent upheaval that led to a reorientation of foreign policy. Quiet alignment with the Western world while maintaining a non-aligned stance has characterised Indonesia's foreign policy since then. Today, it maintains close relations with its neighbours and
12874-561: The East ( de Oost ); and Insulinde . After 1900, Indonesia became more common in academic circles outside the Netherlands, and native nationalist groups adopted it for political expression. Adolf Bastian of the University of Berlin popularized the name through his book Indonesien oder die Inseln des Malayischen Archipels, 1884–1894 . The first native scholar to use the name was Ki Hajar Dewantara when in 1913, he established
13031-544: The GDP rose at an average rate of 7.1%. As a result, the official poverty rate fell from 60% to 15%. Trade barriers reduction from the mid-1980s made the economy more globally integrated. The growth ended with the 1997 Asian financial crisis that severely impacted the economy, including a 13.1% real GDP contraction in 1998 and a 78% inflation. The economy reached its low point in mid-1999 with only 0.8% real GDP growth. Relatively steady inflation and an increase in GDP deflator and
13188-453: The Gyroplane No. 1 lifted its pilot into the air about 0.6 metres (2 ft) for a minute. The Gyroplane No. 1 proved to be extremely unsteady and required a man at each corner of the airframe to hold it steady. For this reason, the flights of the Gyroplane No. 1 are considered to be the first manned flight of a helicopter, but not a free or untethered flight. That same year, fellow French inventor Paul Cornu designed and built
13345-571: The Martian atmosphere is 100 times thinner than Earth's, its two blades spin at close to 3,000 revolutions a minute, approximately 10 times faster than that of a terrestrial helicopter. In 2017, 926 civil helicopters were shipped for $ 3.68 billion, led by Airbus Helicopters with $ 1.87 billion for 369 rotorcraft, Leonardo Helicopters with $ 806 million for 102 (first three-quarters only), Bell Helicopter with $ 696 million for 132, then Robinson Helicopter with $ 161 million for 305. By October 2018,
13502-521: The Philippines, Palau, and Australia. At 4,884 metres (16,024 ft), Puncak Jaya is Indonesia's highest peak, and Lake Toba in Sumatra is the largest lake, with an area of 1,145 km (442 sq mi). Indonesia's largest rivers are in Kalimantan and New Guinea and include Kapuas , Barito , Mamberamo , Sepik and Mahakam . They serve as communication and transport links between
13659-600: The Spice Islands of Maluku during the Age of Discovery . Following three and a half centuries of Dutch colonialism , Indonesia secured its independence after World War II . Indonesia's history has since been turbulent, with challenges posed by natural disasters, corruption, separatism, a democratisation process, and periods of rapid economic growth. Indonesia consists of thousands of distinct native ethnic groups and hundreds of linguistic groups, with Javanese being
13816-491: The UN) scattered over both sides of the equator, around 6,000 of which are inhabited. The largest are Sumatra , Java , Borneo (shared with Brunei and Malaysia), Sulawesi , and New Guinea (shared with Papua New Guinea). Indonesia shares land borders with Malaysia on Borneo and Sebatik , Papua New Guinea on the island of New Guinea, East Timor on the island of Timor , and maritime borders with Singapore, Malaysia, Vietnam,
13973-550: The aircraft's handling properties under low airspeed conditions—it has proved advantageous to conduct tasks that were previously not possible with other aircraft, or were time- or work-intensive to accomplish on the ground. Today, helicopter uses include transportation of people and cargo, military uses, construction, firefighting, search and rescue , tourism , medical transport, law enforcement, agriculture, news and media , and aerial observation , among others. A helicopter used to carry loads connected to long cables or slings
14130-470: The archipelago and made much of the Northern Hemisphere without summer in 1816 . The latter produced the loudest sound in recorded history and caused 36,000 deaths due to the eruption itself and the resulting tsunamis, with significant additional effects around the world years after the event. Recent catastrophic disasters due to seismic activity include the 2004 Indian Ocean earthquake and
14287-560: The archipelago around 2,000 BCE and confined the native Melanesians to the far eastern regions as they spread east. Ideal agricultural conditions and the mastering of wet-field rice cultivation as early as the eighth century BCE allowed villages, towns, and small kingdoms to flourish by the first century CE. The archipelago's strategic sea-lane position fostered inter-island and international trade, including with Indian kingdoms and Chinese dynasties, from several centuries BCE. Trade has since fundamentally shaped Indonesian history. From
14444-571: The archipelago was tenuous. Dutch forces were engaged continuously in quelling rebellions on and off Java. The influence of local leaders such as Prince Diponegoro in central Java, Imam Bonjol in central Sumatra, Pattimura in Maluku , and the Aceh War weakened the Dutch and tied up the colonial military forces. Only in the early 20th century did Dutch dominance extend to what was to become Indonesia's current boundaries. During World War II,
14601-466: The aviation industry; and the turboshaft engine for helicopter use, pioneered in December 1951 by the aforementioned Kaman K-225, finally gave helicopters an engine with a large amount of power and a low weight penalty. Turboshafts are also more reliable than piston engines, especially when producing the sustained high levels of power required by a helicopter. The turboshaft engine was able to be scaled to
14758-476: The basis of all TNI branches' structure, aimed at maintaining domestic stability and deterring foreign threats. The military has possessed a strong political influence since its founding, which peaked during the New Order . Political reforms in 1998 included the removal of the TNI's formal representation from the legislature. Nevertheless, its political influence remains, albeit at a reduced level. Since independence,
14915-522: The beginning of the Indonesian National Revolution , the Dutch recognised Indonesian independence in the face of international pressure in December 1949, following the Dutch–Indonesian Round Table Conference . Despite political, social, and sectarian divisions, Indonesians found unity in their fight for independence. As president, Sukarno moved Indonesia from democracy towards authoritarianism and maintained power by balancing
15072-435: The blades angle forwards or backwards, or left and right, to make the helicopter move in those directions. The anti-torque pedals are located in the same position as the rudder pedals in a fixed-wing aircraft, and serve a similar purpose, namely to control the direction in which the nose of the aircraft is pointed. Application of the pedal in a given direction changes the pitch of the tail rotor blades, increasing or reducing
15229-677: The building of roads. These operations are referred to as longline because of the long, single sling line used to carry the load. In military service helicopters are often useful for delivery of outsized slung loads that would not fit inside ordinary cargo aircraft: artillery pieces, large machinery (field radars, communications gear, electrical generators), or pallets of bulk cargo. In military operations these payloads are often delivered to remote locations made inaccessible by mountainous or riverine terrain, or naval vessels at sea. In electronic news gathering , helicopters have provided aerial views of some major news stories, and have been doing so, from
15386-406: The cockpit from overhead. The control is called the cyclic because it changes cyclic pitch of the main blades. The result is to tilt the rotor disk in a particular direction, resulting in the helicopter moving in that direction. If the pilot pushes the cyclic forward, the rotor disk tilts forward, and the rotor produces a thrust in the forward direction. If the pilot pushes the cyclic to the side,
15543-499: The country hardest hit by the 1997 Asian financial crisis . It brought out popular discontent with the New Order's corruption and suppression of political opposition and ultimately ended Suharto's presidency. In 1999, East Timor seceded from Indonesia, following its 1975 invasion by Indonesia and a 25-year occupation marked by international condemnation of human rights abuses . Since 1998, democratic processes have been strengthened by enhancing regional autonomy and instituting
15700-456: The country has struggled to maintain unity against local insurgencies and separatist movements. Some, notably in Aceh and Papua , have led to an armed conflict and subsequent allegations of human rights abuses and brutality from all sides. The former was resolved peacefully in 2005, while the latter has continued amid a significant, albeit imperfect, implementation of regional autonomy laws. Reports from Amnesty , Human Rights Watch , and
15857-497: The country's first direct presidential election in 2004 . Political, economic and social instability, corruption, and instances of terrorism remained problems in the 2000s; however, the economy has performed strongly since 2007. Although relations among the diverse population are mostly harmonious, acute sectarian discontent and violence remain problematic in some areas. A political settlement to an armed separatist conflict in Aceh
16014-415: The country's total maritime area, and has set a target to increase this to 30% by 2045. However, a 2023 study suggested this target is not on track and that existing marine reserves are poorly managed. Around 390 marine areas are managed in some way by government bodies, communities, and other sectors, with potential for these to be considered other effective area-based conservation measures (OECMs). There
16171-470: The cyclic, the collective, the anti-torque pedals, and the throttle. The cyclic control is usually located between the pilot's legs and is commonly called the cyclic stick or just cyclic . On most helicopters, the cyclic is similar to a joystick. However, the Robinson R22 and Robinson R44 have a unique teetering bar cyclic control system and a few helicopters have a cyclic control that descends into
16328-432: The destruction of peatlands, large-scale illegal deforestation (causing extensive haze across parts of Southeast Asia ), over-exploitation of marine resources, air pollution, garbage management, and reliable water and wastewater services . These issues contribute to Indonesia's low ranking (number 116 out of 180 countries) in the 2020 Environmental Performance Index . The report also indicates that Indonesia's performance
16485-539: The dominant religion in Java and Sumatra by the end of the 16th century. For the most part, Islam overlaid and mixed with existing cultural and religious influences, which shaped the predominant form of Islam in Indonesia, particularly in Java. The first Europeans arrived in the archipelago in 1512, when Portuguese traders, led by Francisco Serrão , sought to monopolise the sources of nutmeg , cloves , and cubeb pepper in
16642-485: The early 21st century, as well as recently weaponized utilities such as artillery spotting , aerial bombing and suicide attacks . The English word helicopter is adapted from the French word hélicoptère , coined by Gustave Ponton d'Amécourt in 1861, which originates from the Greek helix ( ἕλιξ ), genitive helikos (ἕλῐκος), "helix, spiral, whirl, convolution" and pteron ( πτερόν ) "wing". In
16799-439: The event was taken by Max Skladanowsky , but it remains lost . In 1885, Thomas Edison was given US$ 1,000 (equivalent to $ 34,000 today) by James Gordon Bennett, Jr. , to conduct experiments towards developing flight. Edison built a helicopter and used the paper for a stock ticker to create guncotton , with which he attempted to power an internal combustion engine. The helicopter was damaged by explosions and one of his workers
16956-651: The executive branch. Reforms since 1998 have markedly increased its role in national governance, while the DPD is a new chamber for matters of regional management. Most civil disputes appear before the State Court ( Pengadilan Negeri ); appeals are heard before the High Court ( Pengadilan Tinggi ). The Supreme Court of Indonesia ( Mahkamah Agung ) is the highest level of the judicial branch and hears final cessation appeals and conducts case reviews. Other courts include
17113-728: The fall of the New Order , no political party has won an overall majority of seats. The Indonesian Democratic Party of Struggle (PDI-P) secured the most votes in the 2024 general election , becoming their third consecutive wins since 2014. Other notable parties include the Party of the Functional Groups ( Golkar ), the Great Indonesia Movement Party ( Gerindra ), the Democratic Party , and
17270-641: The first customers, ADAC Air Rescue and the Bavarian State Police , took place shortly thereafter. In 1972, further type certification was granted by the Federal Aviation Administration (FAA) and the Civil Aviation Authority (CAA), enabling export orders from the United States and Britain respectively, which soon followed. In 1972, an improved version of the rotorcraft with more powerful engines,
17427-486: The first half of the 20th century was that the amount of power produced by an engine was not able to overcome the engine's weight in vertical flight. This was overcome in early successful helicopters by using the smallest engines available. When the compact, flat engine was developed, the helicopter industry found a lighter-weight powerplant easily adapted to small helicopters, although radial engines continued to be used for larger helicopters. Turbine engines revolutionized
17584-410: The flexibility of the main rotor allows for active elements other than rotor pitch changes to be removed, greatly simplifying maintenance and extending blade lifespan. The reliability of the advanced rotor system is such that, in over six million operating hours across the fleet, there was a total of zero failures (as of 1991). The rigid rotor design adopted on the Bo 105 has been partially responsible for
17741-438: The frequency of drought and food shortages (with an impact on precipitation and the patterns of wet and dry seasons, and thus Indonesia's agriculture system ) as well as numerous diseases and wildfires. Rising sea levels would also threaten most of Indonesia's population, who live in low-lying coastal areas. Impoverished communities would likely be affected the most by climate change. Tectonically , most of Indonesia's area
17898-515: The high operating cost of helicopters cost-effective in ensuring that oil platforms continue to operate. Various companies specialize in this type of operation. NASA developed Ingenuity , a 1.8 kg (4.0 lb) helicopter used to survey Mars (along with a rover). It began service in February 2021 and was retired due to sustained rotor blade damage in January 2024 after 73 sorties. As
18055-480: The idea of vertical flight. In July 1754, Russian Mikhail Lomonosov had developed a small coaxial modeled after the Chinese top but powered by a wound-up spring device and demonstrated it to the Russian Academy of Sciences . It was powered by a spring, and was suggested as a method to lift meteorological instruments. In 1783, Christian de Launoy , and his mechanic , Bienvenu, used a coaxial version of
18212-504: The in-service and stored helicopter fleet of 38,570 with civil or government operators was led Robinson Helicopter with 24.7% followed by Airbus Helicopters with 24.4%, then Bell with 20.5 and Leonardo with 8.4%, Russian Helicopters with 7.7%, Sikorsky Aircraft with 7.2%, MD Helicopters with 3.4% and other with 2.2%. The most widespread model is the piston Robinson R44 with 5,600, then the H125/ AS350 with 3,600 units, followed by
18369-576: The inhabitants of the "Indian Archipelago or Malay Archipelago ". In the same publication, one of his students, James Richardson Logan , used Indonesia as a synonym for Indian Archipelago . Dutch academics writing in East Indies publications were reluctant to use Indonesia . They preferred Malay Archipelago ( Dutch : Maleische Archipel ); the Netherlands East Indies ( Nederlandsch Oost Indië ), popularly Indië ;
18526-498: The interiors of Kalimantan and Papua, and less in areas closer to Australia, such as Nusa Tenggara, which tends to be relatively dry. The almost uniformly warm waters that constitute 81% of Indonesia's area ensure that land temperatures remain relatively constant. Humidity is quite high, at between 70 and 90%. Winds are moderate and generally predictable, with monsoons usually blowing in from the south and east in May through October and from
18683-419: The island's river settlements. Indonesia lies along the equator, and its climate tends to be relatively even year-round. Indonesia has two seasons—a dry season and a wet season —with no extremes of summer or winter. For most parts of Indonesia, the dry season falls between May and October, while the wet season falls between November and April. Indonesia's climate is almost entirely tropical , dominated by
18840-662: The lack of an airstrip would make transport via fixed-wing aircraft impossible. The use of transport helicopters to deliver troops as an attack force on an objective is referred to as " air assault ". Unmanned aerial systems (UAS) helicopter systems of varying sizes are developed by companies for military reconnaissance and surveillance duties. Naval forces also use helicopters equipped with dipping sonar for anti-submarine warfare , since they can operate from small ships. Oil companies charter helicopters to move workers and parts quickly to remote drilling sites located at sea or in remote locations. The speed advantage over boats makes
18997-464: The largest. A shared identity has developed with the motto " Bhinneka Tunggal Ika " ("Unity in Diversity" literally , "many, yet one"), defined by a national language , cultural diversity, religious pluralism within a Muslim-majority population, and a history of colonialism and rebellion against it. A developing country , Indonesia is classified a newly industrialized country , with its economy
19154-581: The late 1960s. Helicopters have also been used in films, both in front and behind the camera. The largest single non-combat helicopter operation in history was the disaster management operation following the 1986 Chernobyl nuclear disaster . Hundreds of pilots were involved in airdrop and observation missions, making dozens of sorties a day for several months. " Helitack " is the use of helicopters to combat wildland fires . The helicopters are used for aerial firefighting (water bombing) and may be fitted with tanks or carry helibuckets . Helibuckets, such as
19311-555: The limited power did not allow for manned flight. The introduction of the internal combustion engine at the end of the 19th century became the watershed for helicopter development as engines began to be developed and produced that were powerful enough to allow for helicopters able to lift humans. Early helicopter designs utilized custom-built engines or rotary engines designed for airplanes, but these were soon replaced by more powerful automobile engines and radial engines . The single, most-limiting factor of helicopter development during
19468-430: The main production line in Germany. In 1984, the Bo 105LS was developed with the enlarged fuselage of the Bo 105CBS combined with more powerful Allison 250-C28C engines to increase the maximum take-off weight as well as hot-and-high flight performance; the Bo 105 LS was manufactured under a cooperative arrangement with Eurocopter Canada . Improvements and modifications to the Bo 105 LS continued until 1995. Production of
19625-485: The monorotor design, and coaxial-rotor , tiltrotor and compound helicopters are also all flying today. Four-rotor helicopters ( quadcopters ) were pioneered as early as 1907 in France, and along with other types of multicopters , have been developed mainly for specialized applications such as commercial unmanned aerial vehicles (drones) due to the rapid expansion of drone racing and aerial photography markets in
19782-642: The national level is the People's Consultative Assembly ( Majelis Permusyawaratan Rakyat , MPR). Its main functions are supporting and amending the constitution, inaugurating and impeaching the president, and formalising broad outlines of state policy. The MPR comprises two houses; the People's Representative Council ( Dewan Perwakilan Rakyat , DPR), with 575 members, and the Regional Representative Council ( Dewan Perwakilan Daerah , DPD), with 136. The DPR passes legislation and monitors
19939-601: The nearby park, the Parco Forlanini. Emmanuel Dieuaide's steam-powered design featured counter-rotating rotors powered through a hose from a boiler on the ground. In 1887 Parisian inventor, Gustave Trouvé , built and flew a tethered electric model helicopter. In July 1901, the maiden flight of Hermann Ganswindt 's helicopter took place in Berlin-Schöneberg; this was probably the first heavier-than-air motor-driven flight carrying humans. A movie covering
20096-503: The north and west in November through April. Typhoons and large-scale storms pose little hazard to mariners; significant dangers come from swift currents in channels, such as the Lombok and Sape straits. Several studies consider Indonesia to be at severe risk from the projected effects of climate change . These include unreduced emissions resulting in an average temperature rise of around 1 °C (2 °F) by mid-century, raising
20253-464: The nose to pitch down, with a resultant increase in airspeed and loss of altitude. Aft cyclic will cause the nose to pitch up, slowing the helicopter and causing it to climb. Increasing collective (power) while maintaining a constant airspeed will induce a climb while decreasing collective will cause a descent. Coordinating these two inputs, down collective plus aft cyclic or up collective plus forward cyclic, will result in airspeed changes while maintaining
20410-425: The only ones where the indigenous people have privileges in their local government. Indonesia maintains 132 diplomatic missions abroad, including 95 embassies. The country adheres to what it calls a "free and active" foreign policy, seeking a role in regional affairs in proportion to its size and location but avoiding involvement in conflicts among other countries. Indonesia was a significant battleground during
20567-487: The opposing forces of the military , political Islam, and the increasingly powerful Communist Party of Indonesia (PKI). Tensions between the military and the PKI culminated in an attempted coup in 1965. The army, led by Major General Suharto , countered by instigating a violent anti-communist purge that killed between 500,000 and one million people and incarcerated roughly a million more in concentration camps . The PKI
20724-544: The poverty line, and the official open unemployment rate was 5.28%. During the first year of the global COVID-19 pandemic , the economy suffered its first recession since the 1997 crisis but recovered in the following year. Indonesia has abundant natural resources. Its primary industries are fishing, petroleum, timber, paper products, cotton cloth, tourism, petroleum mining, natural gas, bauxite, coal, and tin. Its main agricultural products are rice, coconuts, soybeans, bananas, coffee, tea, palm, rubber, and sugar cane. Indonesia
20881-411: The power normally required to be diverted for the tail rotor to be applied fully to the main rotors, increasing the aircraft's power efficiency and lifting capacity. There are several common configurations that use the counter-rotating effect to benefit the rotorcraft: Tip jet designs let the rotor push itself through the air and avoid generating torque. The number, size and type of engine(s) used on
21038-436: The rotor disk tilts to that side and produces thrust in that direction, causing the helicopter to hover sideways. The collective pitch control or collective is located on the left side of the pilot's seat with a settable friction control to prevent inadvertent movement. The collective changes the pitch angle of all the main rotor blades collectively (i.e. all at the same time) and independently of their position. Therefore, if
21195-406: The rotor in cruise, which allows its rotation to be slowed down , thus increasing the maximum speed of the aircraft. The Lockheed AH-56A Cheyenne diverted up to 90% of its engine power to a pusher propeller during forward flight. There are three basic flight conditions for a helicopter: hover, forward flight and the transition between the two. Hovering is the most challenging part of flying
21352-422: The rotor throughout normal flight. The rotor system, or more simply rotor , is the rotating part of a helicopter that generates lift . A rotor system may be mounted horizontally, as main rotors are, providing lift vertically, or it may be mounted vertically, such as a tail rotor, to provide horizontal thrust to counteract torque from the main rotors. The rotor consists of a mast, hub and rotor blades. The mast
21509-485: The rotorcraft; an Alouette II helicopter was modified with the Bo 105's rotor and used to test its performance envelope. The third Bo 105 prototype was equipped with the initial production standard MAN Turbo 6022 turboshaft engines; six pre-production Bo 105s were constructed for testing. On 13 October 1970, the German Civil Aviation Authority certified the Bo 105; initial deliveries for
21666-524: The second Bo 105A prototype conducted its maiden flight at Ottobrunn in Germany; the first public demonstration was held in May 1967. The test program was broken down into stages as the Bo 105 comprised a new airframe, new rotor system, and a new engine; thus the flying Bo 105 prototype was initially equipped with a main rotor from Westland Helicopter's Scout rotorcraft and a pair of Allison Model 250 turboshaft engines instead of their production counterparts. Sud Aviation worked with Bölkow on developing
21823-455: The seventh century CE, the Srivijaya naval kingdom flourished due to trade and the influences of Hinduism and Buddhism . Between the eighth and tenth centuries CE, the agricultural Buddhist Sailendra and Hindu Mataram dynasties thrived and declined in inland Java, leaving grand religious monuments such as Sailendra's Borobudur and Mataram's Prambanan . The Hindu Majapahit kingdom
21980-418: The size of the helicopter being designed, so that all but the lightest of helicopter models are powered by turbine engines today. Special jet engines developed to drive the rotor from the rotor tips are referred to as tip jets . Tip jets powered by a remote compressor are referred to as cold tip jets, while those powered by combustion exhaust are referred to as hot tip jets. An example of a cold jet helicopter
22137-483: The skies. Since helicopters can achieve a unique aerial view, they are often used in conjunction with police on the ground to report on suspects' locations and movements. They are often mounted with lighting and heat-sensing equipment for night pursuits. Military forces use attack helicopters to conduct aerial attacks on ground targets. Such helicopters are mounted with missile launchers and miniguns . Transport helicopters are used to ferry troops and supplies where
22294-438: The subtropical highland climate (Köppen Cwb ) is more pronounced during dry season. Some regions, such as Kalimantan and Sumatra , experience only slight differences in rainfall and temperature between the seasons, whereas others, such as Nusa Tenggara, experience far more pronounced differences with droughts in the dry season and floods in the wet season. Rainfall varies across regions, with more in western Sumatra, Java, and
22451-479: The tail rotor, such as the ducted fan (called Fenestron or FANTAIL ) and NOTAR . NOTAR provides anti-torque similar to the way a wing develops lift through the use of the Coandă effect on the tail boom. The use of two or more horizontal rotors turning in opposite directions is another configuration used to counteract the effects of torque on the aircraft without relying on an anti-torque tail rotor. This allows
22608-448: The throttle is to maintain enough engine power to keep the rotor RPM within allowable limits so that the rotor produces enough lift for flight. In single-engine helicopters, the throttle control is a motorcycle-style twist grip mounted on the collective control, while dual-engine helicopters have a power lever for each engine. A compound helicopter has an additional system for thrust and, typically, small stub fixed wings . This offloads
22765-417: The thrust produced by the tail rotor and causing the nose to yaw in the direction of the applied pedal. The pedals mechanically change the pitch of the tail rotor altering the amount of thrust produced. Helicopter rotors are designed to operate in a narrow range of RPM . The throttle controls the power produced by the engine, which is connected to the rotor by a fixed ratio transmission. The purpose of
22922-490: The type until 2001. The Bo 105 was formally replaced in Eurocopter's product range by the newer Eurocopter EC135 . By the close of production, over 1400 had been produced in Germany, and with license production 1640 had been produced in total. In 1964, development work began at Bölkow upon the helicopter that would become the Bo 105, although work on the hingeless rotor it would use had begun earlier. On 16 February 1967,
23079-403: The type's agility and responsiveness; it remained an uncommon feature on competing helicopters throughout the Bo 105's production life. Military operators would commonly operate the type at a very low altitude to minimise visibility to enemies, the Bo 105 being well matched to such operations, as the helicopter's flight qualities effectively removed or greatly minimised several of the hazards such
23236-720: The type's production and further development, and marketed the BO 105 in the US. The Bo 105 CB and the Bo 105 CBS variants were also subject to license manufacturing agreements, leading to them being produced by the Philippine Aerospace Development Corporation in the Philippines , Indonesian Aerospace (IPTN) in Indonesia , and Construcciones Aeronáuticas SA (CASA) in Spain in addition to
23393-572: The vertical flight he had envisioned. Steam power was popular with other inventors as well. In 1877, the Italian engineer, inventor and aeronautical pioneer Enrico Forlanini developed an unmanned helicopter powered by a steam engine . It rose to a height of 13 meters (43 feet), where it remained for 20 seconds, after a vertical take-off from a park in Milan . Milan has dedicated its city airport to Enrico Forlanini, also named Linate Airport , as well as
23550-633: The village ( desa ) is divided into smaller units called dusun or dukuh (hamlets), which are the same as RW. Following the implementation of regional autonomy measures in 2001, regencies and cities have become chief administrative units responsible for providing most government services. The village administration level is the most influential on a citizen's daily life and handles village or neighbourhood matters through an elected village head ( lurah or kepala desa ). Nine provinces—Aceh, Jakarta, Yogyakarta, Papua , Central Papua , Highland Papua , South Papua , Southwest Papua , and West Papua —are granted
23707-521: The world's 16th-largest by nominal GDP and the 7th-largest by PPP . It is the world's third-largest democracy, a regional power , and is considered a middle power in global affairs. The country is a member of several multilateral organisations, including the United Nations, World Trade Organization , G20 , and a founding member of the Non-Aligned Movement , Association of Southeast Asian Nations , East Asia Summit , D-8 , APEC , and
23864-681: Was a founding member of the Non-Aligned Movement (NAM) and the Organisation of Islamic Cooperation (OIC). Indonesia is a signatory to the ASEAN Free Trade Area agreement, the Cairns Group , the World Trade Organization (WTO), and a former member of OPEC . Indonesia has been a humanitarian and development aid recipient since 1967, and recently, the country established its first overseas aid programme in late 2019. Indonesia's Armed Forces (TNI) include
24021-579: Was achieved in 2005. Indonesia is the southernmost country in Asia. The country lies between latitudes 11°S and 6°N and longitudes 95°E and 141°E . A transcontinental country spanning Southeast Asia and Oceania, it is the world's largest archipelagic state , extending 5,120 kilometres (3,181 mi) from east to west and 1,760 kilometres (1,094 mi) from north to south. The country's Coordinating Ministry for Maritime and Investments Affairs says Indonesia has 17,504 islands (with 16,056 registered at
24178-486: Was badly burned. Edison reported that it would take a motor with a ratio of three to four pounds per horsepower produced to be successful, based on his experiments. Ján Bahýľ , a Slovak inventor, adapted the internal combustion engine to power his helicopter model that reached a height of 0.5 meters (1.6 feet) in 1901. On 5 May 1905, his helicopter reached 4 meters (13 feet) in altitude and flew for over 1,500 meters (4,900 feet). In 1908, Edison patented his own design for
24335-454: Was blamed for the coup and effectively destroyed. Suharto capitalised on Sukarno's weakened position, and following a drawn-out power play with Sukarno , Suharto was appointed president in March 1968. His US-backed "New Order" administration encouraged foreign direct investment , which was a crucial factor in the subsequent three decades of substantial economic growth. Indonesia was
24492-462: Was completed on a series of upgrades to 11 of the Mexican Navy's Bo 105s, having received Forward looking infrared (FLIR) sensors, Global Positioning System (GPS) receivers, search radars , new rotor blades, armament pylons, and other changes. In November 2014, Jet Rescue Air Ambulance inaugurated Mexico's first dedicated civil air ambulance rotorcraft using a Bo 105. During the late 1990s,
24649-401: Was founded in eastern Java in the late 13th century, and under Gajah Mada , its influence stretched over much of present-day Indonesia. This period is often referred to as the "Golden Age" in Indonesian history. The earliest evidence of Islamized populations in the archipelago dates to the 13th century in northern Sumatra . Other parts of the archipelago gradually adopted Islam, and it was
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