96-605: PLUNA Líneas Aéreas Uruguayas S.A. was the flag carrier of Uruguay . It was headquartered in Carrasco, Montevideo and operated scheduled services within South America , as well as scheduled cargo and charter services from its hub at Carrasco International Airport . On 5 July 2012, only two days after the carrier's employees went on strike amid mounting financial difficulties, the Uruguayan government decided to close
192-644: A public company or a state-owned enterprise , while others have been completely privatized . The aviation industry has also been gradually deregulated and liberalized, permitting greater freedoms of the air particularly in the United States and in the European Union with the signing of the Open Skies agreement. One of the features of such agreements is the right of a country to designate multiple airlines to serve international routes with
288-535: A 3,200 nmi (5,900 km; 3,700 mi) range. A total of 154 Boeing 720s and 720Bs were built until 1967. Some 720s were later converted to the 720B specification. The 720 was succeeded by the Boeing 727 trijet. The 707-120 was the first production 707 variant, with a longer, wider fuselage, and greater wingspan than the Dash 80. The cabin had a full set of rectangular windows and could seat up to 189 passengers. It
384-406: A Dutch roll incident he experienced as a passenger on an early commercial 707 flight. As the aircraft's movements did not cease and most of the passengers became ill, he suspected a misrigging of the directional autopilot (yaw damper). He went to the cockpit and found the crew unable to understand and resolve the situation. He introduced himself and relieved the ashen-faced captain who immediately left
480-774: A Uruguayan court concluded that no Leadgate executives were responsible for Pluna's collapse. Two years later, in 2018 a Panamanian-based investment consortium named Caballero Verde S. de R.L. took ownership of LARAH, which still owned 75% of Pluna's shares. The consortium plans to seek compensation from the Uruguayan government for Pluna's demise. As of April 2011, PLUNA linked Uruguay with two destinations in Argentina, one in Chile, one in Paraguay, and eight in Brazil. The following
576-799: A certificate under Section 401 of the Federal Aviation Act of 1958 (i.e., any U.S.-based airline operating internationally), and any ship registered in the United States is known as a U.S. flag vessel . The term "flag carrier" is a legacy of the early days of commercial aviation when governments often took the lead by establishing state-owned airlines because of the high capital costs of running them. However, not all such airlines were government-owned; Pan Am , TWA , Cathay Pacific , Union de Transports Aériens , Canadian Pacific Air Lines and Olympic Airlines were all privately owned, but were considered to be flag carriers as they were
672-414: A convertible passenger–freight configuration, which became the most widely produced variant of the 707. The 707-320C added a strengthened floor and a new cargo door to the -320B model. The wing was fitted with three-section leading-edge flaps which allowed the removal of the underfin. A total of 335 of this variant were built, including some with JT3D-7 engines (19,000 lbf (85 kN) takeoff thrust) and
768-454: A demonstration flight over Lake Washington outside Seattle , on August 7, 1955, test pilot Tex Johnston performed a barrel roll in the 367-80 prototype. Although he justified his unauthorized action to Bill Allen , then president of Boeing, as selling the airplane with a 1 'g' maneuver he was told not to do it again. The 132 in (3,400 mm) wide fuselage of the Dash 80 was large enough for four-abreast (two-plus-two) seating like
864-484: A fuselage 55 feet (17 m) longer than the 707-320B, to 208.6 feet (63.6 m) in length. This second model would have carried 225 passengers in mixed-class configuration and 279 passengers in all-economy configuration. Like the 707-620, the 707-820 was also set to compete with the stretched DC-8-60 Super Series models. The design was being pitched to American, TWA, BOAC, and Pan Am at the time of its proposal in early 1965. The 707-820 would have cost US$ 10,000,000. Like
960-448: A given sovereign state , enjoys preferential rights or privileges accorded by the government for international operations. Historically, the term was used to refer to airlines owned by the government of their home country and associated with the national identity of that country. Such an airline may also be known as a national airline or a national carrier , although this can have different legal meanings in some countries. Today, it
1056-664: A joint venture with Seven Q Seven (SQS) and Omega Air, selected the JT8D-219 low-bypass turbofan as a replacement powerplant for Boeing 707-based aircraft, calling their modified configuration a 707RE. Northrop Grumman selected the -219 to re-engine the US Air Force's fleet of 19 E-8 Joint STARS aircraft, which would allow the J-STARS more time on station due to the engine's greater fuel efficiency. NATO also planned to re-engine their fleet of E-3 Sentry AWACS aircraft. The -219
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#17327878585171152-467: A kink in the trailing edge to add area inboard. Takeoff weight was increased to 302,000 lb (137,000 kg) initially and to 312,000 lb (142,000 kg) with the higher-rated JT4As and center section tanks. Its first flight was on January 11, 1958; 69 turbojet 707-320s were delivered through January 1963, the first passengers being carried (by Pan Am) in August 1959. The 707-420 was identical to
1248-439: A lighter short-range variant, was also introduced in 1960. Powered by Pratt & Whitney JT3D turbofans, the 707-120B debuted in 1961 and the 707-320B in 1962. The 707-120B typically flew 137 passengers in two classes over 3,600 nautical miles [nmi] (6,700 km; 4,100 mi), and could accommodate 174 in one class. With 141 passengers in two classes, the 707-320/420 could fly 3,750 nmi (6,940 km; 4,320 mi) and
1344-436: A longer fuselage and wing meant a painstaking redesign of the wing and landing-gear structures. Rather than spend money on upgrading the 707, engineer Joe Sutter stated the company "decided spending money on the 707 wasn't worth it". The project was cancelled in 1966 in favor of the newer Boeing 747. The 707-820 was a proposed intercontinental stretched variant of the 707-320B. This 412,000-pound MTOW (187,000 kg) variant
1440-524: A participation of 75% into PLUNA at that time; the Government of Uruguay held the balance. In September and October 2010, three additional new CRJ900s aircraft were delivered from the Bombardier factory. In April 2011, three options were taken up for delivery at the end of 2011 and these were delivered between September and November 2011. With these additions, PLUNA's fleet consisted of 13 airplanes,
1536-603: A stronger structure to support a maximum takeoff weight increased by 19,000 lb (8,600 kg), along with modifications to the wing. The 707-320B series enabled nonstop westbound flights from Europe to the West Coast of the United States and from the US to Japan. The final 707 variant was the 707-320C, (C for "Convertible"), which had a large fuselage door for cargo. It had a revised wing with three-sectioned leading-edge flaps, improving takeoff and landing performance and allowing
1632-596: A takeoff weight of 335,000 lb (152,000 kg). Most -320Cs were delivered as passenger aircraft with airlines hoping the cargo door would increase second-hand values. The addition of two additional emergency exits, one on either side aft of the wing raised the maximum passenger limit to 219. Only a few aircraft were delivered as pure freighters. One of the final orders was by the Iranian Government for 14 707-3J9C aircraft capable of VIP transportation, communication, and in-flight refueling tasks. The 707-700
1728-596: A threat to the 757 and 767 programs. The information gathered from testing led to the eventual retrofitting of CFM56 engines to the USAF C-135/KC-135R models, and some military versions of the 707 also used the CFM56. The Douglas DC-8 "Super 70" series with CFM56 engines was developed and extended the DC-8's life in a stricter noise regulatory environment. As a result, significantly more DC-8s remained in service into
1824-460: A viable option because the installation of larger, more powerful engines would need a larger undercarriage, which was not feasible given the design's limited ground clearance at takeoff. Boeing's answer to the problem was the first wide-body airliner—the Boeing 747 . The 707's first-generation engine technology was also rapidly becoming obsolete in the areas of noise and fuel economy, especially after
1920-526: A year. The only rival in intercontinental jet aircraft production at the time was the British de Havilland Comet. However, the Comet series had been the subject of fatal accidents (due to design flaws) early in its introduction and withdrawn from service; virtually redesigned from scratch, it was still smaller and slower than the 707 when reintroduced as version -4. In addition, airlines and their passengers at
2016-699: Is a list of destinations that were served by PLUNA as part of its scheduled services throughout its history: PLUNA had a codeshare agreement with Iberia , which operates the Montevideo–Madrid–Montevideo route. Under the same codeshare agreement, passengers also connected from Madrid to many destinations within Spain and also to Frankfurt . PLUNA also announced a codeshare agreement with American Airlines , which would have placed PLUNA's code on American's Miami-Montevideo route, if it had government approval. Prior to its collapse, PLUNA's fleet consisted of
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#17327878585172112-422: Is any international airline with a strong connection to its home country or that represents its home country internationally, regardless of whether it is government-owned. Flag carriers may also be known as such due to laws requiring aircraft or ships to display the state flag of the country of their registry . For example, under the law of the United States, a U.S. flag air carrier is any airline that holds
2208-568: Is publicized as being half the cost of the competing powerplant, the CFM International CFM56 , and is 40 dB quieter than the original JT3D engines. The first commercial orders for the 707 came on October 13, 1955, when leading global carrier Pan Am committed to 20 Boeing 707s, and 25 Douglas DC-8s, dramatically increasing their passenger capacity (in available revenue passenger seat-miles per hour/per day) over its existing fleet of propeller aircraft. The competition between
2304-484: The 1973 oil crisis . Operations of the 707 were threatened by the enactment of international noise regulations in 1985. Shannon Engineering of Seattle developed a hush kit with funding from Tracor, Inc , of Austin, Texas. By the late 1980s, 172 Boeing 707s had been equipped with the Quiet 707 package. Boeing acknowledged that more 707s were in service than before the hush kit was available. Trans World Airlines flew
2400-456: The 377 Stratocruiser , quickly faded with only 56 examples sold and no new orders as the 1940s drew to a close. That venture had netted the company a $ 15 million loss. During 1949 and 1950, Boeing embarked on studies for a new jet transport and saw advantages with a design aimed at both military and civilian markets. Aerial refueling was becoming a standard technique for military aircraft, with over 800 KC-97 Stratofreighters on order. The KC-97
2496-399: The Boeing 367-80 prototype first flown in 1954, the initial 707-120 first flew on December 20, 1957. Pan Am began regular 707 service on October 26, 1958. With versions produced until 1979, the 707 is a swept wing quadjet with podded engines . Its larger fuselage cross-section allowed six-abreast economy seating, retained in the later 720 , 727 , 737 , and 757 models. Although it
2592-492: The "20" part of the designation is Boeing's "customer number" for its development aircraft. Announced in July 1957 as a derivative for shorter flights from shorter runways, the 707-020 first flew on November 23, 1959. Its type certificate was issued on June 30, 1960, and it entered service with United Airlines on July 5, 1960. As a derivative, the 720 had low development costs, allowing profitability despite few sales. Compared to
2688-531: The "main national airline" and often a sign of their country's presence abroad. The heavily regulated aviation industry also meant aviation rights are often negotiated between governments, denying airlines access to an open market. These Bilateral Air Transport Agreements similar to the Bermuda I and Bermuda II agreements specify rights awardable only to locally registered airlines, forcing some governments to jump-start airlines to avoid being disadvantaged in
2784-404: The -320 by adding a second inboard kink, a dog-toothed leading edge, and curved low-drag wingtips instead of the earlier blunt ones. These wingtips increased overall wingspan by 3.0 ft (0.9 m). Takeoff gross weight was increased to 328,000 lb (149,000 kg). The 175 707-320B aircraft were all new-build; no original -320 models were converted to fan engines in civilian use. First service
2880-409: The -320, but fitted with Rolls-Royce Conway 508 (RCo.12) turbofans (or by-pass turbojets as Rolls-Royce called them) of 18,000 lbf (80 kN) thrust each. The first announced customer was Lufthansa . BOAC 's controversial order was announced six months later, but the British carrier got the first service-ready aircraft off the production line. The British Air Registration Board refused to give
2976-568: The -320, but with Conway turbofan engines. Though initially fitted with turbojet engines, the dominant engine for the Boeing 707 family was the Pratt & Whitney JT3D , a turbofan variant of the JT3C with lower fuel consumption and higher thrust. JT3D-engined 707s and 720s were denoted with a "B" suffix. While many 707-120Bs and -720Bs were conversions of existing JT3C-powered machines, 707-320Bs were available only as newly built aircraft, as they had
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3072-432: The 21st century than 707s. The 707-620 was a proposed domestic range-stretched variant of the 707-320B. The 707-620 was to carry around 200 passengers while retaining several aspects of the 707-320B. It would have been delivered around 1968 and would have also been Boeing's answer to the stretched Douglas DC-8 Series 60 . Had the 707-620 been built, it would have cost around US$ 8,000,000. However, engineers discovered that
3168-399: The 707 also led to the upgrading of air traffic control systems to prevent interference with military jet operations. As the 1960s drew to a close, the exponential growth in air travel led to the 707 being a victim of its own success. The 707 had become too small to handle the increased numbers of passengers on the routes for which it had been designed. Stretching the fuselage again was not
3264-461: The 707 and DC-8 was fierce. Pan Am ordered these planes when and as they did so that they would be the operators of the "first-off" production line for each aircraft type. Once the initial batch of the aircraft had been delivered to them and put into operation, Pan Am would have the distinction of being not only the "Launch Customer" for both transcontinental American jets, but the exclusive operator of American intercontinental jet transports for at least
3360-425: The 707's width again to compete, this time to 148 in (3,760 mm). The first flight of the first-production 707-120 took place on December 20, 1957, and FAA certification followed on September 18, 1958. Both test pilots Joseph John "Tym" Tymczyszyn and James R. Gannett were awarded the first Iven C. Kincheloe Award for the test flights that led to certification. A number of changes were incorporated into
3456-505: The 707-120, it has a length reduced by 9 feet (2.7 m), a modified wing and a lightened airframe for a lower maximum takeoff weight . Powered by four Pratt & Whitney JT3C turbojets, the initial 720 could cover a 2,800 nmi (5,200 km; 3,200 mi) range with 131 passengers in two classes. Powered by JT3D turbofans, the 720B first flew on October 6, 1960, and entered service in March 1961. It could seat 156 passengers in one class over
3552-587: The 707-320B up to 5,000 nmi (9,300 km; 5,800 mi). The 707-320C convertible passenger-freighter model entered service in 1963, and passenger 707s have been converted to freighter configurations. Military derivatives include the E-3 Sentry airborne reconnaissance aircraft and the C-137 Stratoliner VIP transport. In total, 865 Boeing 707s were produced and delivered, not including 154 Boeing 720s. During and after World War II, Boeing
3648-511: The B-47 and B-52, and had developed the yaw damper system on the B-47 that would be applied to later swept-wing configurations like the 707. However, many pilots new to the 707 had no experience with this instability as they were mostly accustomed to flying straight-wing propeller-driven aircraft such as the Douglas DC-7 and Lockheed Constellation . On one customer-acceptance flight, where
3744-580: The Boeing 707. After suspending its scheduled passenger service in April 2013, Saha continued to operate a small fleet of 707s on behalf of the Iranian Air Force . As of 2019, only a handful of 707s remain in operation, acting as military aircraft for aerial refueling, transport, and AWACS missions. Although certified as Series 100s, 200s, 300s, etc., the different 707 variants are more commonly known as Series 120s, 220s, 320s, and so on, where
3840-460: The DC-8, such as United , Delta , and Eastern , were left without jets until September and lost market share on transcontinental flights. Qantas was the first non-US airline to use the 707s, starting in 1959. The 707 quickly became the most popular jetliner of its time. Its success led to rapid developments in airport terminals, runways, airline catering, baggage handling, reservations systems, and other air transport infrastructure. The advent of
3936-522: The Government of Uruguay started negotiations to sell 75% of it shares to a private consortium of investors from Germany , United States , Uruguay and Argentina called Leadgate Investment, a subsidiary of Latin American Regional Aviation Holding Corporation (LARAH), that committed to inject US$ 177 million in the company. In July the same year, the government awarded 75% of PLUNA's stock to LARAH, and
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4032-553: The Stratocruiser. Answering customers' demands and under Douglas competition, Boeing soon realized this would not provide a viable payload, so it widened the fuselage to 144 in (3,660 mm) to allow five-abreast seating and use of the KC-135's tooling. Douglas Aircraft had launched its DC-8 with a fuselage width of 147 in (3,730 mm). The airlines liked the extra space and six-abreast seating, so Boeing increased
4128-504: The acquisition of seven Bombardier CRJ-900s in a deal worth US$ 261 million was announced. In late October 2007 ( 2007-10 ) , PLUNA presented its new corporate image , developed by Australian design company Cato Partners. This new image is based on the interpretation of the name "Uruguay" as meaning "river of the painted birds" or "river of the colorful birds" ( Spanish : Río de los pájaros pintados ). The first of seven brand new CRJ900s that would be incorporated into
4224-423: The acquisition of the airline's first aircraft. The airline flew two five-seater de Havilland Dragonflys from Montevideo to Salto and Paysandú . The two planes were christened Churrinche and San Alberto , the latter in honor of the brothers' father. PLUNA flew 2,600 passengers in their first fiscal year, a huge success for that era. It also flew 20,000 pieces of mail and 70,000 newspapers. The carrier saw
4320-423: The aircraft a certificate of airworthiness, citing insufficient yaw control, excessive rudder forces, and the ability to over-rotate on takeoff, stalling the wing on the ground (a fault of the de Havilland Comet 1). Boeing responded by adding 40 in (100 cm) to the vertical stabilizer, applying full instead of partial rudder boost, and fitting an underfin to prevent over-rotation. These modifications except to
4416-532: The airline down and liquidate it. The carrier was wholly owned by the government at the time of its closure. The airline was established in September 1936, and started operations the following month, on 19 November 1936. It was set up by Jorge and Alberto Márquez Vaesa, two brothers who had obtained the necessary financial and technical support through the ambassador of the United Kingdom to Uruguay at
4512-593: The airline's major shareholders were the Government of Uruguay (49%) and Varig (49%), and private investors held the balance. When Varig entered Chapter 11 bankruptcy protection on 17 June 2005, it sought a bidder for its 49% stake in PLUNA. For almost a year, it looked as if it might go to Venezuela's state-run Conviasa , but the deal officially fell through in July ;2006 ( 2006-07 ) . On 4 January 2007,
4608-444: The arrival of the turbofan-powered 707-120B. The 707-320 Intercontinental is a stretched version of the turbojet-powered 707-120, initially powered by JT4A-3 or JT4A-5 turbojets producing 15,800 lbf (70.3 kN) each (most eventually got 17,500 lbf (77.8 kN) JT4A-11s). The interior allowed up to 189 passengers, the same as the -120 and -220 series, but improved two-class capacity due to an 80-in fuselage stretch ahead of
4704-605: The cities of Santa Cruz in Bolivia and Buenos Aires , Rosario and Córdoba in Argentina to its network. The airline became a wholly government-owned company on 12 November 1951. After World War II, PLUNA's fleet included two Douglas DC-2s which were operated on the Montevideo–Paysandú–Salto route until they were retired by 1951. In the same year, a Douglas DC-3 and four de Havilland Herons were added to
4800-416: The cockpit feeling ill. Johnston disconnected the faulty autopilot and manually stabilized the plane "with two slight control movements". Johnston recommended Boeing increase the height of the tail fin , add a boosted rudder as well as add a ventral fin . These modifications were aimed at mitigating Dutch roll by providing more directional stability in yaw . The initial 145-foot-long (44 m) 707-120
4896-448: The design constraints imposed by limitations of late-1940s jet engines, developing a robust, safe, and high-capacity jet aircraft was within reach for Boeing. Boeing studied numerous wing and engine layouts for its new transport/tanker, some of which were based on the B-47 and C-97, before settling on the 367-80 "Dash 80" quadjet prototype aircraft. Less than two years elapsed from project launch in 1952 to rollout on May 14, 1954, with
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#17327878585174992-421: The face of foreign competition. Some countries also establish flag carriers such as Israel 's El Al or Lebanon 's Middle East Airlines for nationalist reasons or to aid the country's economy, particularly in the area of tourism. In many cases, governments would directly assist in the growth of their flag carriers typically through subsidies and other fiscal incentives. The establishment of competitors in
5088-525: The fin under the tail became standard on all 707 variants and were retrofitted to all earlier 707s. The 37 -420s were delivered to BOAC, Lufthansa, Air-India , El Al , and Varig through November 1963; Lufthansa was the first to carry passengers, in March 1960. The 707-320B had the application of the JT3D turbofan to the Intercontinental, but with aerodynamic refinements. The wing was modified from
5184-487: The first Dash 80 flying on July 15, 1954. The prototype was a proof-of-concept aircraft for both military and civilian use. The United States Air Force was the first customer, using it as the basis for the KC-135 Stratotanker aerial refueling and cargo aircraft. Whether the passenger 707 would be profitable was far from certain. At the time, nearly all of Boeing's revenue came from military contracts. In
5280-519: The fleet during 2008 arrived in March that year; these new aircraft permitted increasing frequencies to existing routes, as well as expanding services to new destinations. In April 2010 ( 2010-04 ) , the Canadian airline holding company Jazz Air Income Fund invested US$ 15 million in LARAH. The move gave this holding an indirect control of 25% of the Uruguayan flag carrier, as LARAH had
5376-704: The fleet. The Herons only stayed in PLUNA's fleet for a short time and by 1957, they had been sold. The DC-3s remained in service much longer, and in 1971, the last four of them were sold to the Fuerza Aérea Uruguaya . São Paulo was added to the route network in January 1954. On 24 June 1958, the carrier entered the turbine era with the delivery of its first of three Vickers Viscounts four-engined turboprops purchased new from Vickers; it later acquired two Viscount 700s from Alitalia and three Viscount 800s from VASP . PLUNA's growth slowed considerably for
5472-570: The following aircraft, as of June 2012. The carrier also operated the following aircraft types throughout its history: PLUNA had only one fatal accident with the loss of ten crew members, the Aviation Safety Network records 3 hull-loss accidents/incidents for the airline. [REDACTED] Media related to PLUNA at Wikimedia Commons Flag carrier A flag carrier is a transport company, such as an airline or shipping company, that, being locally registered in
5568-406: The form of other locally registered airlines may be prohibited or heavily regulated to avoid direct competition. Even where privately run airlines may be allowed to be established, the flag carriers may still be accorded priority, especially in the apportionment of aviation rights to local or international markets. Near the end of the 20th century, many of these airlines have been corporatized as
5664-479: The government to have any stake in PLUNA's successor. In September 2012 ( 2012-09 ) , the auction of the seven Bombardier aircraft that belonged to the liquidated carrier was delayed until October 2012 ( 2012-10 ) as there were no bidders. Cosmo Airlines, a Spanish charter carrier, eventually purchased the seven aircraft at a price of $ 137 million. Regionally, the void created by PLUNA's collapse benefited foreign airlines on some routes. In 2016,
5760-478: The highest number in its history. In early June 2012 ( 2012-06 ) , PLUNA's then CEO , Matías Campiani , disclosed that the airline might face collapse amid a financial distress that led to a loss of US$ 18 million for the eight months ending in February the same year, partly due to the protectionism of the government of Argentina —where the carrier concentrated 21% of its operations— following
5856-487: The holding later sold half of its participation in PLUNA to Varig . At April 2000 ( 2000-04 ) , the airline had 635 employees. At this time the fleet consisted of six Boeing 737-200 Advanced and one McDonnell Douglas DC-10-30 to serve a network that included Asunción , Buenos Aires , Cordoba , Florianópolis , Madrid , Montevideo , Punta del Este , Rio de Janeiro , Rosario , Salvador , Santiago and São Paulo . By late June 2005 ( 2005-06 ) ,
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#17327878585175952-831: The incorporation of both the Potez 62 and the Douglas DC-2 into its fleet in the early 1940s, the latter acquired from the U.S. government . Following the outbreak of World War II , PLUNA was forced to suspend operations between 1942, and 1944, due to the lack of spare parts . The delicate position PLUNA was in at this time led the Uruguayan Government to aid the company by boosting its stake to 85% on 16 October 1944. The first Douglas DC-3 entered PLUNA's fleet in February 1946. The airline launched regular services to Porto Alegre , Brazil , in May 1948. The carrier later added
6048-408: The initial 707's wing to help increase range and payload, giving birth to the 707-320. Pan Am inaugurated 707 service with a christening at National Airport on October 17, 1958, attended by President Eisenhower , followed by a transatlantic flight for VIPs (personal guests of founder Juan Trippe ) from Baltimore's Friendship International Airport to Paris. The aircraft's first commercial flight
6144-506: The jets would bear 700-series numbers, and the first would be the 707. The marketing personnel at Boeing chose 707 because they thought it was more appealing than 700. The project was enabled by the Pratt & Whitney JT3C turbojet engine, the civilian version of the J57 that yielded much more power than the previous generation of jet engines and was proving itself with the B-52. Freed from
6240-622: The last new-build 707 airframes built as E-3 and E-6 aircraft. Traces of the 707 are still found in the 737 , which uses a modified version of the 707's fuselage, as well as the same external nose and cockpit configurations as those of the 707. These were also used on the previous 727 , while the 757 also used the 707 fuselage cross-section. The 707's wings are swept back at 35°, and like all swept-wing aircraft, display an undesirable " Dutch roll " flying characteristic that manifests itself as an alternating combined yawing and rolling motion. Boeing already had considerable experience with this on
6336-428: The last scheduled 707 flight for passengers by a US carrier on October 30, 1983, although 707s remained in scheduled service by airlines from other nations for much longer. Middle East Airlines of Lebanon flew 707s and 720s in front-line passenger service until the end of the 1990s. Since LADE of Argentina removed its 707-320Bs from regular service in 2007, Saha Airlines of Iran was the last commercial operator of
6432-531: The later JT3D-3 version giving 18,000 lbf (80 kN). (This thrust did not require water injection, eliminating both the system and 5000–6000 lb of water.) The -120B had the wing modifications introduced on the 720 and a longer tailplane; a total of 72 were built, 31 for American and 41 for TWA, plus six short-bodied -138Bs for Qantas. American had its 23 surviving -123s converted to -123Bs, but TWA did not convert its 15 -131s. The only other conversions were Pan Am's five surviving -121s and one surviving -139,
6528-413: The launch order for 20 707-121 aircraft by Pan Am and an American Airlines order for 30 707-123 aircraft. The first revenue flight was on October 26, 1958; 56 were built, plus seven short-bodied -138s; the last -120 was delivered to Western in May 1960. The 707-138 was a -120 with a fuselage 10 ft (3.0 m) shorter than the others, with 5 ft (1.5 m) (three frames) removed ahead and behind
6624-404: The maximum takeoff weight the same as that of the -120 (247,000 lb (112 t)), the -138 was able to fly the longer routes that Qantas needed. Braniff International Airways ordered the higher-thrust version with Pratt & Whitney JT4 A engines, the 707-220. The final major derivative was the 707-320, which featured an extended-span wing and JT4A engines, while the 707-420 was the same as
6720-499: The meantime, as the city of Punta del Este flourished as a major tourist destination, PLUNA benefited from that. During this time, an office was also opened in Tel Aviv , Israel . The 1990s, saw financial trouble loom for PLUNA. In 1995, the company was transformed into a public–private partnership and the government sold 51% of the shares to a holding formed by an Argentine consortium named Tevycom and Uruguayan businessmen;
6816-466: The new jet service StarStream , launching its first jet service, between New York-Idlewild International Airport and San Francisco International Airport , on January 25, 1959. American Airlines was the first domestic airline to fly its own jets, on January 25, 1959. TWA started domestic 707-131 flights in March and Continental Airlines started 707-124 flights in June; airlines that had ordered only
6912-454: The next three decades, but it entered the jet age soon after jets were introduced to the world, and added John F. Kennedy International Airport (JFK) in New York , and Miami to its destinations, using Boeing 707 and Boeing 737 aircraft. In the 1980s, PLUNA began flying to Madrid , Asunción , Rio de Janeiro and Santiago de Chile , but services to JFK and Miami were suspended. In
7008-411: The outer port (number 1) engine mount is distinctly different from the other three, as this engine is not fitted with a turbocompressor. Later-model 707s typically had this configuration, although American Airlines had turbocompressors on engines 2 and 3 only. Early 707 models often had turbocompressor fairings on all four engines, but with only two or three compressors installed. Pratt & Whitney, in
7104-403: The production models from the prototype. A Krueger flap was installed along the leading edge between the inner and outer engines on early 707-120 and -320 models. This was in response to de Havilland Comet overrun accidents which occurred after over-rotating on take-off. Wing stall would also occur on the 707 with over-rotation so the leading-edge flaps were added to prevent stalling even with
7200-532: The renationalisation of Aerolíneas Argentinas in 2008, and partly due to the slowdown of the Brazilian economy in the preceding months. Later on, with losses totalling US$ 300 million, Leadgate disposed of their 75% stake in the airline, transferring it back to the Uruguayan government. By that time, that percentage of PLUNA's stock was owned by LARAH, which was in turn 75% owned by Leadgate and 25% by Jazz Air . Despite being initially disclosed that Jazz Air
7296-552: The result that there is no single "flag carrier". The chart below lists airlines considered to be a "flag carrier", based on current or former state ownership or other verifiable designation as a national airline. Minority (20.05%) in the Lufthansa Group acquired in 2020 was sold in 2022. Boeing 707 The Boeing 707 is an early American long-range narrow-body airliner , the first jetliner developed and produced by Boeing Commercial Airplanes . Developed from
7392-443: The tail dragging on the runway. The initial standard model was the 707-120 with JT3C turbojet engines. Qantas ordered a shorter-bodied version called the 707-138, which was a -120 with six fuselage frames removed, three in front of the wings, and three aft. The frames in the 707 were set 20 in (510 mm) apart, so this resulted in a shortening of 10 ft (3.0 m) to a length of 134 ft 6 in (41.0 m). With
7488-478: The three aircraft delivered to the USAF as -153s and the seven short-bodied Qantas -138s (making 13 total 707s delivered to Qantas between 1959 and 1964). The first flight of the -120B was on June 22, 1960, and American carried the first passengers in March 1961; the last delivery was to American in April 1969. Maximum weight was 258,000 lb (117,000 kg) for both the long- and short-bodied versions. The 707-220
7584-474: The time preferred the more established Douglas Aircraft as a maker of passenger aircraft, and several major carriers committed only to the Douglas DC-8, delayed by Douglas' decision to wait for the larger and more fuel efficient ( Pratt & Whitney JT4A ) turbojet to design a larger and longer range aircraft around. Anticipating this advantage, Boeing made a late and costly decision to redesign and enlarge
7680-478: The time, Sir Eugen Millington-Drake . Millington-Drake wrote in his memoirs that he suggested the airline be named using a memorable acronym, taking SABENA as an example. It was then decided on "PLUNA", an acronym for Primeras Líneas Uruguayas de Navegación Aérea (English: First Uruguayan Air Navigation Lines ). Millington-Drake knew De Havilland's representative in Buenos Aires at the time, which helped in
7776-402: The ventral fin to be removed (although the taller fin was retained). The 707-320Bs built after 1963 used the same wing as the -320C and were known as 707-320B Advanced aircraft. In total, 1,010 707s were built for civilian use between 1958 and 1978, though many of these found their way to military service. The 707 production line remained open for purpose-built military variants until 1991, with
7872-414: The wing (from 138 ft 10 in (42.32 m) to 145 ft 6 in (44.35 m) ), with extensions to the fin and horizontal stabilizer extending the aircraft's length further. The longer wing carried more fuel, increasing range by 1,600 miles (2,600 km) and allowing the aircraft to operate as true transoceanic aircraft. The wing modifications included outboard and inboard inserts, as well as
7968-772: The wing, giving increased range. Maximum takeoff weight was the same 247,000 lb (112,000 kg) as the standard version. It was a variant for Qantas, thus had its customer number 38. To allow for full-load takeoffs at the midflight refueling stop in Fiji, the wing's leading-edge slats were modified for increased lift, and the allowable temperature range for use of full takeoff power was increased by 10°F (5.5°C). Seven -138s were delivered to Qantas between June and September 1959, and they first carried passengers in July of that year. The 707-120B had Pratt & Whitney JT3D-1 turbofan engines, which were quieter, more powerful, and more fuel-efficient, rated at 17,000 lbf (75.6 kN), with
8064-503: The yaw damper was turned off to familiarize the new pilots with flying techniques, a trainee pilot's actions violently exacerbated the Dutch roll motion and caused three of the four engines to be torn from the wings. The plane, a brand new 707-227, N7071 , destined for Braniff, crash-landed on a river bed north of Seattle at Arlington, Washington , killing four of the eight occupants. In his autobiography, test pilot Tex Johnston describes
8160-484: Was June 1962, with Pan Am. The 707-320B Advanced is an improved version of the -320B, adding the three-section leading-edge flaps already seen on the -320C. These reduced takeoff and landing speeds and altered the lift distribution of the wing, allowing the ventral fin found on earlier 707s to be removed. From 1965, -320Bs had the uprated -320C undercarriage allowing the same 335,000 lb (152,000 kg) MTOW. These were often identified as 707-320BA-H. The 707-320C has
8256-496: Was a test aircraft used to study the feasibility of using CFM International CFM56 engines on a 707 airframe and possibly retrofitting existing aircraft with the engine. After testing in 1979, N707QT , the last commercial 707 airframe, was restored to 707-320C configuration and delivered to the Moroccan Air Force as a tanker aircraft via a "civilian" order. Boeing abandoned the retrofit program, since they felt it would be
8352-457: Was designed for hot and high operations with more powerful 15,800 lbf (70.3 kN) Pratt & Whitney JT4A-3 turbojets. Five of these were produced, but only four were ultimately delivered, with one being lost during a test flight. All were for Braniff International Airways and carried the model number 707-227; the first entered service in December 1959. This version was made obsolete by
8448-466: Was designed for transcontinental routes, and often required a refueling stop when flying across the North Atlantic. It had four Pratt & Whitney JT3C-6 turbojets, civilian versions of the military J57, initially producing 13,000 lbf (57.8 kN) with water injection . Maximum takeoff weight was 247,000 lb (112,000 kg) and first flight was on December 20, 1957. Major orders were
8544-468: Was from Idlewild Airport , New York, to Le Bourget , Paris, on October 26, 1958, with a fuel stop in Gander, Newfoundland . In December, National Airlines operated the first US domestic jet airline flights between New York/Idlewild and Miami, using 707s leased from Pan Am. In February 1956, rival global giant Trans World Airlines' then-President Howard Hughes ordered eight new Boeing 707-120, dubbing
8640-495: Was known for its military aircraft. The company had produced innovative and important bombers, from the B-17 Flying Fortress and B-29 Superfortress to the jet-powered B-47 Stratojet and B-52 Stratofortress , but its commercial aircraft were not as successful as those from Douglas Aircraft and other competitors. As Douglas and Lockheed dominated the postwar air transport boom, the demand for Boeing's offering,
8736-482: Was not ideally suited for operations with the USAF's new fleets of jet-powered fighters and bombers; this was where Boeing's new design would win military orders. As the first of a new generation of American passenger jets, Boeing wanted the aircraft's model number to emphasize the difference from its previous propeller-driven aircraft, which bore 300-series numbers. The 400-, 500- and 600-series were already used by their missiles and other products, so Boeing decided that
8832-452: Was not interested in taking over the entire 75% stock, and that it was later informed that the Canadian airline was evaluating the acquisition, the government suspended PLUNA's operations on 5 July 2012 ( 2012-07-05 ) —following a strike that started two days earlier, after failing to find new investors for the company. The government announced that both PLUNA's fleet and routes would be auctioned. It seemed there were no plans for
8928-524: Was not the first commercial jetliner in service, the 707 was the first to be widespread, and is often credited with beginning the Jet Age . It dominated passenger air-transport in the 1960s, and remained common through the 1970s, on domestic , transcontinental , and transatlantic flights , as well as cargo and military applications. It established Boeing as a dominant airliner manufacturer with its 7x7 series . The initial, 145-foot-long (44 m) 707-120
9024-418: Was powered by Pratt & Whitney JT3C turbojet engines. The shortened, long-range 707-138 and the more powerful 707-220 entered service in 1959. The longer-range, heavier 707-300/400 series has larger wings and is stretched slightly by 8 feet (2.4 m). Powered by Pratt & Whitney JT4A turbojets, the 707-320 entered service in 1959, and the 707-420 with Rolls-Royce Conway turbofans in 1960. The 720,
9120-543: Was powered by Pratt & Whitney JT3C turbojet engines. The JT3D-3B engines are readily identifiable by the large gray secondary-air inlet doors in the nose cowl. These doors are fully open (sucked in at the rear) during takeoff to provide additional air. The doors automatically close with increasing airspeed. The 707 was the first commercial jet aircraft to be fitted with clamshell-type thrust reversers . The 707 uses engine-driven turbocompressors to supply compressed air for cabin pressurization . On many commercial 707s,
9216-582: Was to be powered by four 22,500-pound-force thrust (100 kN) Pratt & Whitney JT3D-15 turbofan engines, and it would have had a nearly 10-foot (3.0 m) extension in wingspan, to 155.5 feet (47.4 m). Two variations were proposed, the 707-820(505) model and the 707-820(506) model. The 505 model would have had a fuselage 45 feet (14 m) longer than the 707-320B, for a total length of 198.6 feet (60.5 m). This model would have carried 209 passengers in mixed-class configuration and 260 passengers in all-economy configuration. The 506 model would have had
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