74-638: The Beechcraft C-12 Huron is the military designation for a series of twin-engine turboprop aircraft based on the Beechcraft Super King Air and Beechcraft 1900 . C-12 variants are used by the United States Air Force , Army , Navy and Marine Corps . These aircraft are used for various duties, including embassy support, medical evacuation, as well as passenger and light cargo transport. Some aircraft are modified with surveillance systems for various missions, including
148-406: A constant-speed propeller increase their pitch as aircraft speed increases. Another benefit of this type of propeller is that it can also be used to generate reverse thrust to reduce stopping distance on the runway. Additionally, in the event of an engine failure, the propeller can be feathered , thus minimizing the drag of the non-functioning propeller. While the power turbine may be integral with
222-553: A detachment of Pacific Air Forces ' Band of the Pacific. The facility which houses Yokota Air Base was originally constructed by the Imperial Japanese Army (IJA) in 1940 as Tama Airfield, and used as a flight test center. During World War II Yokota became the center of Japanese Army Air Forces flight test activities and the base was the site of the first meeting between Japanese and Italian wartime allies. Tama
296-416: A large amount of air by a small degree than a small amount of air by a large degree, a low disc loading (thrust per unit disc area) increases the aircraft's energy efficiency , and this reduces the fuel use. Propellers work well until the flight speed of the aircraft is high enough that the airflow past the blade tips reaches the speed of sound. Beyond that speed, the proportion of the power that drives
370-481: A non-flying station hosted by the 475th Air Base Wing . The 475th had no numbered flying squadrons, but operated a few T-39 Saberliners and UH-1 helicopters, along with supporting transient MAC cargo and passenger aircraft. Assigned flying squadrons returned to Yokota in 1975 when the 345th Tactical Airlift Squadron was assigned with its C-130Es . Headquarters, Fifth Air Force was transferred to Yokota on 11 November 1974 from Fuchū Air Base , Japan. In 2005,
444-409: A parent unit based at another location. Pacific Air Forces (PACAF) Air Force Special Operations Command (AFSOC) Air Combat Command (ACC) Air Mobility Command (AMC) Coast Guard Pacific Area (PACAREA) United States Indo-Pacific Command (USINDOPACOM) Air Defense Command Resistance to the air base immediately followed the end of US occupation. Gravel used in
518-540: A possible solution to cope with visitor demand during the 2020 Summer Olympics in Tokyo. A broad agreement on civil-military use of the base was agreed on in 2005. In November 2009, the base was attacked by Kakurōkyō members using improvised mortar barrages. In April 2010 Colonel Frank Eppich, the USAF commander of base, banned screenings of the film The Cove at the base theater. A base spokesman said that The Cove
592-591: A test-bed not intended for production. It first flew on 20 September 1945. From their experience with the Trent, Rolls-Royce developed the Rolls-Royce Clyde , the first turboprop engine to receive a type certificate for military and civil use, and the Dart , which became one of the most reliable turboprop engines ever built. Dart production continued for more than fifty years. The Dart-powered Vickers Viscount
666-590: A total area of 7.07 km (2.73 sq mi) and has a 3,353 m × 61 m (11,001 ft × 200 ft) runway. It features the JASDF Air Defense Command Headquarters (ADC headquarters) since 26 March 2012. The headquarters of United States Forces Japan is also located there. Other base facilities are the broadcast center for the American Forces Network Tokyo radio service and
740-656: A various number of squadrons in order to carry out the wing's mission. It is not uncommon to see a KC-135 Stratotanker , C-5 Galaxy , KC-10 Extender , C-130 , C-17 , or civilian charter ( Omni Air International , Air Transport International etc. mostly Boeing 757 or 767 ) and cargo ( Atlas Air , Kalitta Air etc. mostly Boeing 747 ) airline aircraft on military charters on the Transient Aircraft ramp. RQ-4B Global Hawks of Detachment 1, 319th Operations Group deploy to Yokota from Andersen AFB in Guam during
814-700: A version of the Super King Air A200C (modified with a 1.32 m by 1.32 m; 52 inch by 52 inch cargo door from the Super King Air 200C), designating it the UC-12B, for logistics support between Naval and Marine Corps air stations, air facilities, and other activities, both in CONUS and overseas. The cabin can readily accommodate cargo, passengers or both. It is also equipped to accept litter patients in medical evacuation missions. Through 1982,
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#1732798076927888-429: Is a turbine engine that drives an aircraft propeller . A turboprop consists of an intake , reduction gearbox , compressor , combustor , turbine , and a propelling nozzle . Air enters the intake and is compressed by the compressor. Fuel is then added to the compressed air in the combustor, where the fuel-air mixture then combusts . The hot combustion gases expand through the turbine stages, generating power at
962-482: Is normally a constant-speed (variable pitch) propeller type similar to that used with larger aircraft reciprocating engines , except that the propeller-control requirements are very different. Due to the turbine engine's slow response to power inputs, particularly at low speeds, the propeller has a greater range of selected travel in order to make rapid thrust changes, notably for taxi, reverse, and other ground operations. The propeller has 2 modes, Alpha and Beta. Alpha
1036-587: Is responsible for providing an enhanced quality of life, facilities and programs for 11,000 military, civilian and dependents as well as 150,000 transient personnel per year. The 374th Force Support Squadron provides manpower and personnel support, membership clubs, child development, youth programs, food service, lodging, sports/fitness, recreation/leisure activities, comprehensive readiness program, marketing/publicity, linen exchange, and mortuary operations for Yokota AB. Each year in September, Yokota Air Base opens
1110-494: Is sacrificed in favor of shaft power, which is obtained by extracting additional power (beyond that necessary to drive the compressor) from turbine expansion. Owing to the additional expansion in the turbine system, the residual energy in the exhaust jet is low. Consequently, the exhaust jet produces about 10% of the total thrust. A higher proportion of the thrust comes from the propeller at low speeds and less at higher speeds. Turboprops have bypass ratios of 50–100, although
1184-404: Is the mode for all flight operations including takeoff. Beta, a mode typically consisting of zero to negative thrust, is used for all ground operations aside from takeoff. The Beta mode is further broken down into 2 additional modes, Beta for taxi and Beta plus power. Beta for taxi as the name implies is used for taxi operations and consists of all pitch ranges from the lowest alpha range pitch, all
1258-576: The A-26 Invader -equipped 3d Bombardment Group by August 1946. Additional construction during the 1940s and 1950s was completed and the base reached its current size around 1960. On the occasion of extension, the course of Hachiko Line and National Route 16 was changed, and Itsukaichi Kaidō was divided. During the initial postwar occupation years, Yokota hosted the following known USAAF/USAF units: These units performed photographic reconnaissance and mapping of Japan and South Korea . During
1332-616: The B-57 equipped 3rd Bombardment Wing where it trained in bombardment, reconnaissance and aerial refueling operations. The Air Defense Command 40th Fighter-Interceptor Squadron (December 1961 – May 1962) equipped with the F-102 Delta Dagger performing an air defense mission. The 6102d Air Base Wing assumed host unit status for the base, being replaced by the 441st Combat Support Group in 1964. The Vietnam War resulted in an increased combat and airlift aircraft presence at
1406-512: The C-6 Ute and T-44 series. In addition, there are a number of Beechcraft 1900s operated by the military under civilian registrations, using their civilian model designations. Data from Jane's All the World's Aircraft 2005-2006 General characteristics Performance Related development Aircraft of comparable role, configuration, and era Turboprop A turboprop
1480-461: The Cefly Lancer , Beechcraft RC-12 Guardrail and Project Liberty programs. The first C-12A models entered service with the U.S. Army in 1974 and were used as a liaison and general personnel transport. The aircraft was essentially an "off-the-shelf" Super King Air 200, powered by the type's standard Pratt & Whitney Canada PT6A-41 engines. The U.S. Navy followed suit in 1979, ordering
1554-614: The Korean War , Yokota was used for combat missions over North and South Korea. Known units based there were: With the Korean War reaching an armistice in July 1953, Yokota Air Base returned to a peacetime Cold War status. Two major wings were stationed at the base during the 1950s, the 67th Reconnaissance Wing (1956–60) flying RF-80s, RF-84s and lastly RF-101s . The 35th Fighter-Interceptor Wing (1954–57) flew F-86 Sabres from
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#17327980769271628-634: The P-3 Orion , and the C-130 Hercules military transport aircraft. The first turbine-powered, shaft-driven helicopter was the Kaman K-225 , a development of Charles Kaman 's K-125 synchropter , which used a Boeing T50 turboshaft engine to power it on 11 December 1951. December 1963 saw the first delivery of Pratt & Whitney Canada's PT6 turboprop engine for the then Beechcraft 87, soon to become Beechcraft King Air . 1964 saw
1702-841: The Piper Meridian , Socata TBM , Pilatus PC-12 , Piaggio P.180 Avanti , Beechcraft King Air and Super King Air . In April 2017, there were 14,311 business turboprops in the worldwide fleet. Between 2012 and 2016, the ATSB observed 417 events with turboprop aircraft, 83 per year, over 1.4 million flight hours: 2.2 per 10,000 hours. Three were "high risk" involving engine malfunction and unplanned landing in single‑engine Cessna 208 Caravans , four "medium risk" and 96% "low risk". Two occurrences resulted in minor injuries due to engine malfunction and terrain collision in agricultural aircraft and five accidents involved aerial work: four in agriculture and one in an air ambulance . Jane's All
1776-614: The Tupolev Tu-114 can reach 470 kn (870 km/h; 540 mph). Large military aircraft , like the Tupolev Tu-95 , and civil aircraft , such as the Lockheed L-188 Electra , were also turboprop powered. The Airbus A400M is powered by four Europrop TP400 engines, which are the second most powerful turboprop engines ever produced, after the 11 MW (15,000 hp) Kuznetsov NK-12 . In 2017,
1850-495: The 586th Flight Test Squadron, Holloman Air Force Base , New Mexico . Another is based at the 517th Airlift Squadron, Elmendorf Air Force Base , Alaska . Three were based at the 55th Airlift Flight, Osan Air Base , South Korea. They have been relocated to the 459th Airlift Squadron , Yokota Air Base , Japan. The remaining two are used by U.S. Army Aviation. Although the UD- series 1900s were manufactured exclusively for military use,
1924-579: The F-105 squadrons after their parent organization, the 8th Tactical Fighter Wing , relocated to George Air Force Base , California to become an F-4 Phantom II unit. With the reassignment of the 347th Fighter Wing to Yokota in 1968, the 347th assumed responsibility for all tactical fighters until its reassignment to Kunsan Air Base , South Korea in March 1971. In 1971, all combat squadrons were transferred to Kadena and Misawa Air Base and Yokota became
1998-494: The Japanese and U.S. governments, calling for a halt in flights and compensation for damages caused by the noise pollution. At present, a small fraction of the compensation demanded for past damages appears likely to be awarded. "Yokota Airbase Pollution Lawsuit No. 9", filed on 12 December 2012 and "New Yokota Airbase Pollution Lawsuit No. 2", filed on 26 March 2013, are currently being disputed. The 374th Force Support Squadron
2072-575: The Japanese government announced that the headquarters of the Japan Air Self-Defense Force Air Defense Command would be moved to Yokota. The Tokyo Metropolitan Government has advocated opening Yokota to civilian flights as a method of relieving traffic at Haneda and Narita Airport . Governor Shintaro Ishihara raised the joint-use proposal during the 2003 gubernatorial election, and Governor Naoki Inose made comments in 2013 that suggested joint use as
2146-523: The King Air 200, represent specially built airframes that combined upgraded engines (1,100 shp PT6A-67) and structural upgrades (swapping the traditional KA-200/300/350 T-Tail for the 1900 modified T-Tail to compensate for torque and aerodynamics and having reinforced spars to compensate for the increased maximum gross weight - up to as high as 16,500 lbs). Note: The U.S. military also operates other King Air versions under other designations, including
2220-455: The Liberty program had exceeded 300,000 combat flying hours. The MC-12W was rushed into combat as a supplemental surveillance and signals intelligence asset. Since its first combat mission on 10 June 2009, the aircraft flew 400,000 combat hours in 79,000 combat sorties, aiding in the kill or capture of "more than 8,000 terrorists" and uncovering 650 weapons caches. With its roles taken over by
2294-610: The Model 200-based UC-12F and UC-12M along with the Cessna UC-35D and replace them with new UC-12Ws by 2032. The Air Force currently operates only 4 C-12Js. 3 are operated by the 459th Airlift Squadron at Yokota Air Base , Japan and 1 by the Air Force Materiel Command from Holloman AFB , New Mexico. The Army has C-12Js in use. The following RC-12 variants, although similar to earlier RC-12s based on
Beechcraft C-12 Huron - Misplaced Pages Continue
2368-522: The Navy ordered 64 of these aircraft. A U.S. Air Force variant of the plane for surveillance roles primarily over Afghanistan and Iraq was the MC-12W Liberty. For that variant, Beechcraft built the basic plane and then sent it to Greenville, Texas where sophisticated intelligence, surveillance and reconnaissance (ISR) equipment was installed by L-3 Communications Missions Integration . As of 2013
2442-533: The Soviet Union had the technology to create the airframe for a jet-powered strategic bomber comparable to Boeing's B-52 Stratofortress , they instead produced the Tupolev Tu-95 Bear, powered with four Kuznetsov NK-12 turboprops, mated to eight contra-rotating propellers (two per nacelle) with supersonic tip speeds to achieve maximum cruise speeds in excess of 575 mph, faster than many of
2516-487: The Super King Air 200, use PT6A-42 engines, and have a maximum takeoff weight (MTOW) of 13,500 lb (6,100 kg). They are configured as combi aircraft and are also used for multi-engine training and testing. To meet the needs of transporting larger groups, the U.S. Army purchased six C-12J aircraft, based on the Beechcraft 1900 C commuter airliner. One of the military C-12Js is used for GPS jamming tests at
2590-579: The U.S. Navy with Training Squadron 35 (VT-35), the Navy's only TC-12B Huron squadron based at Naval Air Station Corpus Christi , Texas, home of the Training Air Wing 4 (TAW-4). The Navy retired this aircraft on 16 May 2017 and replaced and now relies on the T-44C for multi engine training. The UC-12F and UC-12M are light passenger and cargo airlift versions procured for the U.S. Navy and Marine Corps from 1986 and 1987 respectively. They are based on
2664-465: The USAAF became the USAF in 1947, at which point it became Yokota Air Base. Some metal manhole covers stamped "WAAB" remain in use around the base as of 2017. The initial USAAF use for the base was for airlift operations when the 2d Combat Cargo Group arrived with four C-47 Skytrain squadrons. When the old runway deteriorated under heavy usage, the runway was repaired and Yokota supported operations of
2738-738: The United States military and other military and government organizations use 1900s from other series such as the UB-series 1900C, and 1900Ds which may be found elsewhere. The UC-12W is an improved version of the UC-12F/M for the Marine Corps procured from 2010 for the same missions. It is based on the Super King Air 350, uses PT6A-60A engines, and has an MTOW of 16,500 lb (7,500 kg). According to its 2022 Marine Aviation Plan, United States Marine Corps Aviation plans to phase out
2812-479: The World's Aircraft . 2005–2006. Yokota Air Base Yokota Air Base ( 横田飛行場 , Yokota Hikōjō ) , ( IATA : OKO , ICAO : RJTY ) is a Japan Air Self-Defense Force (JASDF) and United States Air Force (USAF) base in the Tama Area, or Western Tokyo . It occupies portions of Akishima , Fussa , Hamura , Mizuho , Musashimurayama , and Tachikawa . The base houses 14,000 personnel. It occupies
2886-512: The base. A Tactical Air Command (TAC) air refueling unit, the 421st Air Refueling Squadron flew KB-29s, and later KB-50Js from Yokota from 1953 to 1965. All of these units were under the command of the 41st Air Division . The 35th TFW was reassigned in 1957 and the 67th TRW in 1960. Defense budget restrictions in the late 1950s caused several PACAF wings based in Japan to be reassigned or inactivated. These tactical fighter units were replaced by
2960-499: The base. They had originally been scheduled to deploy to Yokota in 2020, but the deployment was brought forward. As the first permanent deployment of the aircraft outside of Okinawa, the move sparked local protests. The number of aircraft will eventually reach 10. The host unit at Yokota is the 374th Airlift Wing and is currently used for airlift missions throughout East Asia . The 374th includes four groups: operations, mission support, maintenance and medical. Each group manages
3034-408: The base. Yokota was used for ferrying B-52 Stratofortresses to Southeast Asia along with being a base for US-based deployed F-105 Thunderchief 35th , 36th and 80th Tactical Fighter Squadrons . The 610th Military Airlift Support Squadron (1966–78) was created by Military Airlift Command (MAC) to service the large increase in transiting airlift. The 65th Military Airlift Support Group (1969–71)
Beechcraft C-12 Huron - Misplaced Pages Continue
3108-707: The bombers to attack secondary targets. The Nakajima plant was finally attacked in April 1945, but the Tama airfield never was bombed. With the Surrender of Japan on 2 September 1945, a detachment of the United States Army 1st Cavalry Division arrived at the base on 4 September. The airfield's buildings were largely intact, and some 280 of the IJA's most modern aircraft were discovered in hangars. The 1st Cavalry named
3182-417: The compressor intake is at the aft of the engine, and the exhaust is situated forward, reducing the distance between the turbine and the propeller. Unlike the small-diameter fans used in turbofan engines, the propeller has a large diameter that lets it accelerate a large volume of air. This permits a lower airstream velocity for a given amount of thrust. Since it is more efficient at low speeds to accelerate
3256-569: The construction of the airfields was taken from the Tama River, lowering the riverbed and affecting the traditional irrigation system (Fuchū-yōsui), which had provided water to local communities since the early Edo period. The base also caused great stress to nearby inhabitants in a number of other ways, such as fuel leaks and spills that contaminated groundwater and well water, foul odors and fires, deafening noise pollution, and repeated plane crashes. Although local leaders succeeded in bringing about
3330-459: The control system. The turboprop system consists of 3 propeller governors , a governor, and overspeed governor, and a fuel-topping governor. The governor works in much the same way a reciprocating engine propeller governor works, though a turboprop governor may incorporate beta control valve or beta lift rod for beta operation and is typically located in the 12 o'clock position. There are also other governors that are included in addition depending on
3404-443: The disaster recovery efforts. During the crisis, around 600 American family members voluntarily departed the base for locations outside Japan. On 21 March 2012 JASDF units completed moving from Fuchū Air Base (Tokyo) . On 26 March, JASDF Yokota Air Base started operations. In 2013, the air base was again attacked by Kakurokyo members by improvised mortar barrages. On 5 April 2018 five CV-22 Osprey tiltrotor aircraft deployed to
3478-550: The east and the factory of Showa Aircraft Industry to the south, it was compared to the aircraft development complex of the USAAF Wright-Patterson Field in Ohio. According to the USAAF intelligence at the time, the two bases conducted all IJA flight testing. In the spring of 1945, XXI Bomber Command attacked the base eight times along with the aircraft manufacturing plant, but each time heavy clouds forced
3552-484: The facility Fussa Army Airfield, then at the end of September renamed it Yokota Army Airfield after a nearby village (now incorporated in Musashimurayama ) the name of which appeared on a 1944 US map. The name was to have been changed to Wilkins Army Air Base (WAAB) after Medal of Honor recipient Raymond "Ray" Wilkins , but orders for this never arrived and it remained under the name Yokota Army Airfield until
3626-499: The first jet aircraft and comparable to jet cruising speeds for most missions. The Bear would serve as their most successful long-range combat and surveillance aircraft and symbol of Soviet power projection through to the end of the 20th century. The USA used turboprop engines with contra-rotating propellers, such as the Allison T40 , on some experimental aircraft during the 1950s. The T40-powered Convair R3Y Tradewind flying-boat
3700-564: The first deliveries of the Garrett AiResearch TPE331 , (now owned by Honeywell Aerospace ) on the Mitsubishi MU-2 , making it the fastest turboprop aircraft for that year. In contrast to turbofans , turboprops are most efficient at flight speeds below 725 km/h (450 mph; 390 knots) because the jet velocity of the propeller (and exhaust) is relatively low. Modern turboprop airliners operate at nearly
3774-570: The gas generator section, many turboprops today feature a free power turbine on a separate coaxial shaft. This enables the propeller to rotate freely, independent of compressor speed. Alan Arnold Griffith had published a paper on compressor design in 1926. Subsequent work at the Royal Aircraft Establishment investigated axial compressor-based designs that would drive a propeller. From 1929, Frank Whittle began work on centrifugal compressor-based designs that would use all
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#17327980769273848-460: The gas power produced by the engine for jet thrust. The world's first turboprop was designed by the Hungarian mechanical engineer György Jendrassik . Jendrassik published a turboprop idea in 1928, and on 12 March 1929 he patented his invention. In 1938, he built a small-scale (100 Hp; 74.6 kW) experimental gas turbine. The larger Jendrassik Cs-1 , with a predicted output of 1,000 bhp,
3922-399: The gates to the Japanese community for its annual Friendship Festival. For two days, local residents can learn about Yokota Air Base. Food and events are provided for all ages. Roughly 200,000 visitors show up each year, although non-Japanese visitors may be turned away from the gates for security reasons. For those two days, visitors are able to examine many types of aircraft and tour some of
3996-573: The growing MQ-9 Reaper fleet, the Air Force decided to divest itself of the 41 Liberty aircraft and turn them over to the U.S. Army and U.S. Special Operations Command , which was completed by October 2015. The Air Force's final MC-12W deployment in support of Operation Enduring Freedom ended on 13 October 2015. The TC-12B Huron was a twin-engine, pressurized version of the Beechcraft Super King Air 200. Twenty-five served with
4070-515: The large cargo planes from inside. Each year, service member volunteers base-wide form "D Squadron" for the event, offering some visitors an enhanced on-base experience. In 2020 and 2021, it was canceled due to the spread of the COVID-19 pandemic . 2022 was held on May 21 and May 22, three months earlier than usual. On the May 22, the 46th President of the United States , Joe Biden , visited Japan with
4144-406: The model, such as an overspeed and fuel topping governor on a Pratt & Whitney Canada PT6 , and an under-speed governor on a Honeywell TPE331 . The turboprop is also distinguished from other kinds of turbine engine in that the fuel control unit is connected to the governor to help dictate power. To make the engine more compact, reverse airflow can be used. On a reverse-flow turboprop engine,
4218-671: The most widespread turboprop airliners in service were the ATR 42 / 72 (950 aircraft), Bombardier Q400 (506), De Havilland Canada Dash 8 -100/200/300 (374), Beechcraft 1900 (328), de Havilland Canada DHC-6 Twin Otter (270), Saab 340 (225). Less widespread and older airliners include the BAe Jetstream 31 , Embraer EMB 120 Brasilia , Fairchild Swearingen Metroliner , Dornier 328 , Saab 2000 , Xian MA60 , MA600 and MA700 , Fokker 27 and 50 . Turboprop business aircraft include
4292-416: The pilot not being able to see out of the rear of the aircraft for backing and the amount of debris reverse stirs up, manufacturers will often limit the speeds beta plus power may be used and restrict its use on unimproved runways. Feathering of these propellers is performed by the propeller control lever. The constant-speed propeller is distinguished from the reciprocating engine constant-speed propeller by
4366-403: The point of exhaust. Some of the power generated by the turbine is used to drive the compressor and electric generator . The gases are then exhausted from the turbine. In contrast to a turbojet or turbofan , the engine's exhaust gases do not provide enough power to create significant thrust, since almost all of the engine's power is used to drive the propeller. Exhaust thrust in a turboprop
4440-494: The propeller that is converted to propeller thrust falls dramatically. For this reason turboprop engines are not commonly used on aircraft that fly faster than 0.6–0.7 Mach , with some exceptions such as the Tupolev Tu-95 . However, propfan engines, which are very similar to turboprop engines, can cruise at flight speeds approaching 0.75 Mach. To maintain propeller efficiency across a wide range of airspeeds, turboprops use constant-speed (variable-pitch) propellers. The blades of
4514-485: The propeller. This allows for propeller strike or similar damage to occur without damaging the gas generator and allowing for only the power section (turbine and gearbox) to be removed and replaced in such an event, and also allows for less stress on the start during engine ground starts. Whereas a fixed shaft has the gearbox and gas generator connected, such as on the Honeywell TPE331 . The propeller itself
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#17327980769274588-450: The propulsion airflow is less clearly defined for propellers than for fans. The propeller is coupled to the turbine through a reduction gear that converts the high RPM /low torque output to low RPM/high torque. This can be of two primary designs, free-turbine and fixed. A free-turbine turboshaft found on the Pratt & Whitney Canada PT6 , where the gas generator is not connected to
4662-516: The return of land that had been taken for the base in Tachikawa, at Yokota, the number of departures and landings per year reached 20,000. Pilot training that simulated landing jets on aircraft carriers was also held several times each year, often throughout the night. Because such training, together with the engine testing and daily flights, created a level of noise pollution that local inhabitants found unbearable, numerous lawsuits were filed against
4736-592: The same speed as small regional jet airliners but burn two-thirds of the fuel per passenger. Compared to piston engines, their greater power-to-weight ratio (which allows for shorter takeoffs) and reliability can offset their higher initial cost, maintenance and fuel consumption. As jet fuel can be easier to obtain than avgas in remote areas, turboprop-powered aircraft like the Cessna Caravan and Quest Kodiak are used as bush airplanes . Turboprop engines are generally used on small subsonic aircraft, but
4810-787: The typhoon season, normally between June and December. The newly renovated Air Mobility Command (AMC) Passenger Terminal is on the main part of the base next to the flightline. It is a 5 to 7-minute walk from the Kanto Lodge (see below) and offers Space-Available flights to various destinations in PACAF such as Alaska , Guam , Hawaii , Korea , Okinawa , Singapore , as well as the Continental United States. Flying and notable non-flying units based at Yokota Air Base. Units marked GSU are Geographically Separate Units, which although based at Yokota, are subordinate to
4884-410: The way down to zero pitch, producing very little to zero-thrust and is typically accessed by moving the power lever to a beta for taxi range. Beta plus power is a reverse range and produces negative thrust, often used for landing on short runways where the aircraft would need to rapidly slow down, as well as backing operations and is accessed by moving the power lever below the beta for taxi range. Due to
4958-514: Was a headquarters organization for MAC airlift support squadrons in the Pacific and Far East. The F-105 squadrons deployed frequently to USAF-operated bases in Thailand to fly combat missions over North and South Vietnam , and to South Korea for alert missions. Initially the fighter squadrons were under the command of the 41st Air Division , but was reassigned shortly after to the 6441st Tactical Fighter Wing , activated in April 1965 to control
5032-499: Was banned because using a base venue to display the film could be seen as an endorsement of the film. The spokesman added, "We have a lot of issues with Japan... and anything done on an American base would be seen as an approval of that event." Personnel and aircraft from the base assisted with Operation Tomodachi following and during the March 2011 Tōhoku earthquake and tsunami and Fukushima I nuclear accidents . The base also served as an important hub for airlifted assistance during
5106-514: Was destroyed in a bombing raid. In 1941, the engine was abandoned due to war, and the factory converted to conventional engine production. The first mention of turboprop engines in the general public press was in the February 1944 issue of the British aviation publication Flight , which included a detailed cutaway drawing of what a possible future turboprop engine could look like. The drawing
5180-532: Was first identified by United States Army Air Forces (USAAF) in November 1944 by a 3rd Reconnaissance Squadron F-13 Superfortress photo-reconnaissance aircraft, flying from Tinian in the Mariana Islands . It was identified as being associated with the aircraft manufacturing plant belonging to Nakajima Aircraft Company in the nearby town (now city) of Musashino . Along with Tachikawa Air Base to
5254-714: Was operated by the U.S. Navy for a short time. The first American turboprop engine was the General Electric XT31 , first used in the experimental Consolidated Vultee XP-81 . The XP-81 first flew in December 1945, the first aircraft to use a combination of turboprop and turbojet power. The technology of Allison's earlier T38 design evolved into the Allison T56 , used to power the Lockheed Electra airliner, its military maritime patrol derivative
5328-647: Was produced and tested at the Ganz Works in Budapest between 1937 and 1941. It was of axial-flow design with 15 compressor and 7 turbine stages, annular combustion chamber. First run in 1940, combustion problems limited its output to 400 bhp. Two Jendrassik Cs-1s were the engines for the world's first turboprop aircraft – the Varga RMI-1 X/H . This was a Hungarian fighter-bomber of WWII which had one model completed, but before its first flight it
5402-603: Was the first turboprop aircraft of any kind to go into production and sold in large numbers. It was also the first four-engined turboprop. Its first flight was on 16 July 1948. The world's first single engined turboprop aircraft was the Armstrong Siddeley Mamba -powered Boulton Paul Balliol , which first flew on 24 March 1948. The Soviet Union built on German World War II turboprop preliminary design work by Junkers Motorenwerke, while BMW, Heinkel-Hirth and Daimler-Benz also worked on projected designs. While
5476-488: Was very close to what the future Rolls-Royce Trent would look like. The first British turboprop engine was the Rolls-Royce RB.50 Trent , a converted Derwent II fitted with reduction gear and a Rotol 7 ft 11 in (2.41 m) five-bladed propeller. Two Trents were fitted to Gloster Meteor EE227 — the sole "Trent-Meteor" — which thus became the world's first turboprop-powered aircraft to fly, albeit as
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