BAC One-Eleven

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One-Eleven
TAROM BAC 1-11-500; YR-BCI@ZRH;02.10.1995 (8353902456).jpg
A TAROM One-Eleven: a low wing airliner powered by two aft-mounted engines
RoleShort-range jet airliner
National originUnited Kingdom
Manufacturer
First flight20 August 1963 [1]
Introduction1965 with British United Airways
Retired7 May 2019
StatusRetired [2]
Primary users British Airways
Produced
  • 1963–1982 (United Kingdom)
  • 1982–1989 (Romania)
Number built244

The BAC One-Eleven (or BAC-111/BAC 1-11) is an early jet airliner produced by the British Aircraft Corporation (BAC). Originally conceived by Hunting Aircraft as a 30-seat jet, before its merger into BAC in 1960, it was launched as an 80-seat airliner with a British United Airways order on 9 May 1961. The prototype conducted its maiden flight on 20 August 1963, and it was first delivered to its launch customer on 22 January 1965. The 119-seat, stretched 500 series was introduced in 1967. Total production amounted to 244 until 1982 in the United Kingdom and between 1982 and 1989 in Romania where nine Rombac One-Elevens were licence-built by Romaero.

Contents

The short haul, narrowbody aircraft was powered by aft-mounted Rolls-Royce Spey low-bypass turbofans, a configuration similar to the earlier Sud Aviation Caravelle and later Douglas DC-9. It also competed with early Boeing 737 variants and was used by multiple British, European and US airlines, including Romanian operators. It was replaced by the newer Airbus A320 and later 737 variants, as well as by the Bombardier CRJ200 regional jet. Noise restrictions accelerated its transition to African carriers in the 1990s, and the last BAC One-Eleven was retired in 2019.

Development

Early development

The initial Hunting 107 concept from Hunting Aircraft Hunting 107.png
The initial Hunting 107 concept from Hunting Aircraft

In the 1950s, although the pioneering de Havilland Comet had suffered disasters in service, strong passenger demand had been demonstrated for jet propulsion. Several manufacturers raced to release passenger jets, including those aimed at the short-haul market, such as the Sud Aviation Caravelle. [3] In July 1956, British European Airways published a paper calling for a "second generation" jet airliner to operate beside their existing turboprop designs. This led to a variety of designs from the British aerospace industry. Hunting Aircraft started design studies on a jet-powered replacement for the successful Vickers Viscount, developing the 30-seat Hunting 107. Around the same time, Vickers started a similar development of a 140-seat derivative of its VC10 project, the VC11. Many other aviation firms also produced designs. [4]

In 1960 Hunting, under British government pressure, merged with Vickers-Armstrongs, Bristol, and English Electric to form British Aircraft Corporation (BAC). The new BAC decided that the Hunting project had merit, but that there would be little market for a 30-seat jet airliner. [5] The design was reworked into the BAC 107, a 59-seat airliner powered by two 7,000 pounds-force (31 kN) Bristol Siddeley BS75 turbofan engines. [6] BAC also continued development of the larger, 140-seat VC-11 development of the Vickers VC10 which it had inherited. [7] Other competing internal projects, such as the Bristol Type 200, were quickly abandoned following absorption of Hunting into BAC. [8]

The selected Rolls-Royce Spey low-bypass turbofan RR Spey.jpg
The selected Rolls-Royce Spey low-bypass turbofan

Market research showed the 59-seat BAC 107 was too small, and the design was reworked in 1961, with passenger capacity growing to 80 seats, and BS75s being discarded in favour of Rolls-Royce Speys. [9] The revised design was redesignated the BAC 111 (later known as the One-Eleven), with BAC abandoning the VC11 project to concentrate on the more promising One-Eleven. Unlike contemporary British airliners such as the Hawker Siddeley Trident, the One-Eleven was not designed specifically to meet the needs of the state-owned British European Airways or British Overseas Airways Corporation, but on the needs of airlines around the world, and BAC expected orders for as many as 400. [10]

On 9 May 1961 the One-Eleven was publicly launched when British United Airways (BUA) placed the first order for ten One-Eleven 200s. [11] On 20 October Braniff International Airways in the United States ordered six. [12] Mohawk Airlines sent representatives to Europe seeking out a new aircraft to bring them into the jet era, and on 24 July 1962 concluded an agreement for four One-Elevens. [13] Orders followed from Kuwait Airways for three, and Central African Airways for two. Braniff subsequently doubled their order to 12, while Aer Lingus ordered four. Western Airlines ordered ten but later cancelled. [12] Bonanza Air Lines also ordered three in 1962 [14] but was stopped by the US Civil Aeronautics Board (CAB), which claimed that subsidies would be needed to operate a jet on Bonanza's routes, an action claimed by some at the time to be protectionism. [15] The CAB also stopped Frontier Airlines and Ozark Air Lines from ordering One-Elevens, although allowing Ozark to order the similar Douglas DC-9 and Frontier to order Boeing 727-100s. The CAB had also unsuccessfully tried to block Mohawk's orders. [12] [16]

In May 1963, BAC announced the One-Eleven 300 and 400. The new versions used the Mk. 511 version of the Spey with increased power, allowing more fuel upload and hence longer range. The difference between the 300 and 400 lay in the equipment and avionics, the 400 intended for sales in the United States and thus equipped with US instruments. [12] On 17 July 1963, American Airlines ordered 15 aircraft, bringing the total to 60, plus options for 15. [17] [18] American Airlines eventually bought 30 of the 400-series, making the airline the largest customer of One-Elevens.

Prototypes

The first delivery was to British United Airways on 22 January 1965 G-ASJI 1 One-Eleven 201 British United LGW 14MAY66 (6785552209).jpg
The first delivery was to British United Airways on 22 January 1965

The prototype (G-ASHG) rolled out of Hurn assembly hall on 28 July 1963, at which point BAC had received orders for the type from a number of operators. On 20 August 1963, the prototype conducted its first flight, painted in BUA livery. The first flight had taken place almost a year before the Douglas DC-9, a rival American jetliner; BAC considered the One-Eleven to hold a technological edge. [1] The One-Eleven's lead was of significant importance commercially, since, as shown by the Bonanza Air Lines case, US authorities could refuse to approve sales of foreign aircraft to domestic airlines where an American alternative existed (Bonanza ended up ordering and operating the DC-9). Test flying was conducted by Squadron Leader Dave Glaser.

The One-Eleven prototype, flown by test pilot Mike Lithgow, crashed on 22 October during stall testing, with the loss of all on board. The investigation led to the discovery of what became known as deep stall or superstall, a phenomenon caused by reduced airflow to the tailplane caused by the combined blanking effects of the wing and the aft-mounted engine nacelles at high angles of attack, which prevents recovery of normal (nose-down) flight. [19] To prevent such stalls, BAC designed and added devices known as stick shakers and stick pushers to the One-Eleven's control system. [20] It also redesigned the wing's leading edge to smooth airflow into the engines and over the tailplane. The specially modified aircraft used for testing this problem is now preserved at Brooklands Museum.

Despite the crash, testing continued and customer confidence remained high. American Airlines and Braniff took up their optional orders and placed more in February 1964. Further orders came from Mohawk, Philippine Airlines and German businessman Helmut Horten, who ordered the first executive modification of the aircraft. By the end of 1964, 13 aircraft had rolled off the production line. The One-Eleven was certified and the first handover, of G-ASJI to BUA, was on 22 January 1965. After several weeks of route-proving flights, the first revenue service flew on 9 April from Gatwick to Genoa. Braniff took delivery of its first aircraft on 11 March, while Mohawk received its first on 15 May. Deliveries continued, and by the end of 1965 airlines had received 34 aircraft. Demand remained buoyant, with a second production line set up at Weybridge - producing 13 1-11s between 1966 and 1970.

The One-Eleven 500, 510ED and 475

Introduced in 1967, the 500 series are stretched by 13.5 ft (4.1 m) British Aircraft Corporation BAC 1-11 Series 523FJ, European Aviation (EAL) JP6105232.jpg
Introduced in 1967, the 500 series are stretched by 13.5 ft (4.1 m)

In 1967 a larger 119-seat version was introduced as the One-Eleven 500 (also known as Super One-Eleven). This "stretched" version was delayed for at least a year while its launch customer BEA assessed its requirements. This gave competing US aircraft (the Douglas DC-9 and Boeing 737) the opportunity to compensate for the One-Eleven's early penetration of the US domestic market. The British aircraft's initial one-year advantage now turned into a one-year delay, and the stretched series 500 failed to sell in the US. The type saw service with Cayman Airways and Leeward Islands Air Transport (LIAT) in the Caribbean with Cayman Airways operating the series 500 on scheduled services to Houston, Texas (IAH) and Miami, Florida (MIA), and LIAT flying its series 500s into San Juan, Puerto Rico (SJU). Bahamasair also operated the stretched 500 model with service between Nassau (NAS) and Miami among other routes while Guatemalan carrier Aviateca operated its series 500 aircraft into both Miami and New Orleans, Louisiana (MSY). [21] Costa Rican airline LACSA operated the series 500 as well on its services to Miami. [22] Another air carrier which operated the series 500 into Miami was Belize Airways Ltd. [23]

Compared with earlier versions, the One-Eleven 500 was longer by 8 ft 4in (2.54 m) ahead of the wing and 5 ft 2in (1.57 m) behind it. The wing span was increased by 5 ft (1.5 m), and the latest Mk. 512 version of the Spey was used. The new version sold reasonably well across the world, particularly to European charter airlines. In 1971 it received an incremental upgrade to reduce drag and reduce runway requirements.

The 510ED cockpit, similar to the Hawker Siddeley Trident BAC 111-510ED One-Eleven, AB Airlines (European Aircharter - EAL) AN0528338.jpg
The 510ED cockpit, similar to the Hawker Siddeley Trident

BEA/British Airways 500 series aircraft (denoted One-Eleven 510ED) varied significantly from other One-Elevens, at BEA's request. The One-Eleven 510ED had a modified cockpit which incorporated instrumentation and avionics from or similar to that of the Hawker Siddeley Trident, for better commonality with the type. Their additional equipment included a more sophisticated autopilot, which allowed autoland in CAT II and included an autothrottle. The modifications went as far as reversing the "on" position of most switches to match that of the Trident; indeed, the 510ED was so different from other One-Elevens and 500 series aircraft that a different type rating was required to fly it.

Having faced competition from US aircraft by 1966, by 1970 the One-Eleven also faced competition from newer, smaller aircraft such as the Fokker F28 Fellowship. The F28 was lighter, less complex, and cheaper. The One-Eleven 475 of 1970 was launched to compete with the F28. It combined the 400 fuselage with the higher power and larger wing of the 500 and was intended for hot and high as well as rough airfield operations; however only ten One-Eleven Mk 475s were sold with one airline being Faucett Peru which operated its series 475 aircraft on scheduled domestic services into several airports with unpaved gravel runways in Peru. [24] In 1977, the One-Eleven 670, a quiet and updated 475, was offered to the Japanese domestic market, also failing to sell.

Proposed developments

The BAC X-Eleven would have been stretched for up to 160 seats and powered by larger CFM56 or JT10D turbofans BAC X-Eleven.jpg
The BAC X-Eleven would have been stretched for up to 160 seats and powered by larger CFM56 or JT10D turbofans

Total deliveries for 1965 were 34 aircraft, [25] while 200 aircraft had been built by the end of 1971. [25] At this point orders slowed to a trickle, with production being suspended in 1975, although marketing and design continued, and it was always planned to restart production when sufficient orders had been received. [26] BAC restarted production in 1977 as a result of an order for five aircraft by the Romanian airline Tarom. [27] British production continued until 1984, with a total of 235 aircraft built in Britain. [25] There were two reasons why the production line was kept open for just 35 aircraft delivered over 11 years: first, BAC hoped that Rolls-Royce would develop a quieter and more powerful version of the Spey engine, making possible further One-Eleven developments; second, throughout the early part of the period Romania was negotiating to buy the entire One-Eleven programme and transfer production of the type to Bucharest.

By 1974, BAC invested significant effort into launching the One-Eleven 700. This had a longer fuselage with a 134-seat interior and the projected 16,900 lbf (75 kN) Spey 606 engine producing greater power and less noise. [28] [29] The 700J was planned for the Japanese market, with the same stretched fuselage and engines as the 700 and a new high-lift wing for operation into regional airports with short runways. [27] The 700 was approximately the same size as the latest DC-9s and 737s and would have been available in time to prevent large-scale defections by One-Eleven clients to McDonnell-Douglas and Boeing. Rolls-Royce was still recovering from bankruptcy, however, and the uprated Spey failed to materialise. An altogether less ambitious 700 made a reappearance in 1978 as a 500 with specially "hush-kitted" Speys which would be replaced by the proposed RB432 in the mid-1980s. This was offered to British Airways in competition with Boeing 737-200s, but was ultimately rejected.

In 1975, BAC launched the One-Eleven 800, a further stretched aircraft to be powered by two 22,000 lbf (98 kN) CFM International CFM56 high-bypass turbofans and seating 144 to 161 passengers, [30] [29] but this project was abandoned in 1976 in favour of a new derivative of the One-Eleven with a wider fuselage capable of six-abreast seating. This new airliner was unveiled later that year as the X-Eleven, which would be powered by two CFM-56s or Pratt & Whitney JT10D engines and seat up 166 passengers. [31] In 1977, BAC merged with Hawker Siddeley to form British Aerospace (BAe) and the new company was faced with the choice of developing the X-Eleven or joining European efforts to design an-all new aircraft. In the end, BAe became a full member of Airbus, and the X-Eleven was abandoned, with the European alternative becoming the Airbus A320. [32]

The BAC Two-Eleven and Three-Eleven were British airliner studies proposed by the British Aircraft Corporation in the late 1960s which never made it to production.

Rombac production

The first Rombac 1-11 was delivered to TAROM on 29 December 1982 ROMBAC 1-11 (YR-BRA).jpg
The first Rombac 1-11 was delivered to TAROM on 29 December 1982

On 9 June 1979, Romanian president Nicolae Ceaușescu signed a contract for One-Eleven licence production in Romania. This was to involve the delivery of three complete One-Elevens (two 500-series aircraft and one 475 series) plus the construction of at least 22 in Bucharest, with the reduction of British (and thus increase of Romanian) content. It also involved Romanian production of Rolls-Royce Spey engines and certification of the aircraft to British standards by the Civil Aviation Authority. A market for up to 80 Romanian-built aircraft was projected at the time, largely in China and other developing economies, and possibly Eastern Europe. The aircraft was redesignated Rombac 1-11. [33] [34] The Spey 512-14 DW engines were produced under license by Turbomecanica Bucharest. [35]

The first Rombac One-Eleven, (YR-BRA cn 401) a series 561RC, was rolled out at Romaero Băneasa factory on 27 August 1982 and first flew on 18 September 1982. Production continued until 1989 at a much slower pace than foreseen in the contract. Nine aircraft were delivered, with the 10th and 11th aircraft on the production line being abandoned when they were 85% and 70% complete. [33] [36] The first aircraft was delivered to TAROM on 29 December 1982. [36] The Romanian carrier took delivery of all but two of the aircraft produced, the remaining two going to Romavia, the last of which (YR-BRI cn 409) was delivered on 1 January 1993.

There were three reasons why the Rombac initiative failed. Romania's economy and international position deteriorated to the point where supplies needed for One-Eleven manufacturing slowed to a trickle, with hard currency restrictions delaying the delivery of components sourced outside Romania; [33] [36] the market foreseen by the Romanians failed to show an interest, though some Rombac machines were leased to European operators. The One-Eleven's noise level and fuel economy failed to keep pace with US and West European competition.

Adopting a new engine would have resolved noise and fuel economy issues. Following the fall of the Ceaușescu regime, plans were made to restart production using the Rolls-Royce Tay. British aircraft leasing company Associated Aerospace agreed a $1 billion deal to purchase 50 Tay-powered One-Elevens fitted with a new electronic glass cockpit for onward leasing to Western customers. The liquidation of Associated Aerospace in April 1991 stopped this deal. Despite this setback, Rombac continued to try to sell the One-Eleven, with US operator Kiwi International Air Lines placing a firm order for 11 Tay-engined aircraft with options for an additional five, but these plans never happened. [33] [36] [37] [38] [39]

Operational history

Several American Airlines BAC One-Elevens at LaGuardia Airport Line-up of American Airlines BAC 111-401AK One-Eleven at LaGuardia Airport.jpg
Several American Airlines BAC One-Elevens at LaGuardia Airport

Once in service, the One Eleven found itself in competition with the Douglas DC-9, and was joined by another competitor, the Boeing 737, only a year after its introduction. [40] Advantages over the DC-9 included a lower unit cost. The DC-9 offered more seating, and its engines were interchangeable with those on the Boeing 727. These factors led to Trans Australia Airlines choosing to purchase the DC-9 instead. [40] In the US, the Civil Aeronautics Board was sceptical of smaller operators' need for jet aircraft and withheld financing, leading to several US customers cancelling their One-Eleven orders. [41]

Mohawk Airlines became both the first American operator of the type and the first airline in the US to operate jet aircraft on short haul routes. [42] On 25 June 1965, Mohawk introduced its first One-Eleven into passenger service; by the end of the decade, the airline operated a fleet of 20 BAC One-Elevens. [43] Buying the jets pushed Mohawk into debt and this, along with an economic downturn and strike action, led to its forced merger with Allegheny Airlines which in turn continued to operate the One-Eleven. [44] In July 1963, American Airlines had placed an order for 15 400-series One-Elevens for £14 million; this was the first time American Airlines had purchased a foreign aircraft type for its fleet. [45] Braniff International Airways, another major US air carrier, also ordered the One-Eleven. [46] Aloha Airlines selected the One-Eleven as its first jet type for interisland service in the Hawaiian Islands.

Several British operators, including Dan Air and British Caledonian, made extensive use of the type. Dan Air increased the number of One-Elevens it had in service in the 1970s, eventually replacing its aging de Havilland Comets with the One-Eleven entirely in the 1980s. The type became the airline's main revenue generator. [47] Dan Air would often lease One-Elevens, including Rombac-produced aircraft, to meet short-term demands. During periods of low demand Dan Air would lease its own One-Elevens to other operators. British Caledonian and Dan Air One-Elevens would often be exchanged between the two airlines on temporary and permanent arrangements. Passenger demand grew on several key One-Eleven routes, exceeding the Series 500's larger capacity during the 1980s, which began to force airlines to use other planes. [48]

Before the formation of British Airways (BA), some predecessor companies, British European Airways and Cambrian Airways, were operating the One-Eleven. Their fleets were inherited by BA. British Airways Regional Division found the performance of the One-Eleven more than adequate and sought to expand operations with the type, including further acquisitions, in the early 1970s in part to replace Vickers Viscounts. BA's 400-Series One-Elevens were all named after areas and locations in the English Midlands, reflecting the type's new base at Birmingham Airport. [49] BA ordered more Series-500 aircraft in the late 1970s and the airline received some of the last British-made One-Elevens. [50]

British Caledonian had begun replacing its One-Elevens with the new Airbus A320, when it was merged with British Airways in 1987 due to financial problems. [51] In both Caledonian and British Airways service, the One-Elevens were a dominant type for the operator's European routes. BA proceeded to rationalise its fleets, retiring many overlapping types, the One-Eleven being gradually phased out for the more modern A320 and Boeing 737 jetliners. The last aircraft was removed from regular service with BA in October 1992. [52] A number of ex-BA aircraft saw service with Maersk Air before, in turn, being replaced by the Bombardier CRJ200 in the late 1990s. [53]

A Ryanair One-Eleven Ryanair Bucuresti Rombac 1-11-561RC One-Eleven Haafke-1.jpg
A Ryanair One-Eleven

In Ireland Aer Lingus flew One-Elevens for three decades, in both the scheduled and charter markets. The aircraft was used on less-busy European routes into the 1990s. [53] The One-Eleven was important in budget airline Ryanair's early years: it had sought an aircraft for low-fare scheduled services from regional airports, and obtained One-Elevens. The first of these, a Rombac-produced 500-Series, entered service on the Dublin–Luton route on 1 December 1986. Ryanair's fleet expanded to six aircraft by 1988, with three leased from Romania. [54] These leased aircraft were later replaced with former BA One-Elevens. Ultimately Ryanair replaced the One-Eleven with the Boeing 737 in the mid-1990s. [55]

In April 1966, Philippine Airlines began operating One Elevens in revenue service. They eventually operated 12 of the later 500-Series. One of these aircraft suffered two separate in-flight bomb explosions, but was repaired each time and continued in service until 1992. In another high-profile incident on 21 May 1982, John Clearno tried to hijack a Philippine One-Eleven while on the ground, but was eventually overpowered by the cockpit crew following hours of negotiation. No passengers or crew were injured. [56] Philippine Airlines replaced the type with the Boeing 737 from 1989 onwards. [57]

Romania was a major customer for British-produced One-Elevens, with several large orders in the 1970s. These aircraft were often fitted with equipment such as engine 'hush kits'. In May 1977, a major cooperation agreement between British Aerospace and the Romanian government was signed, and this led to a gradual One-Eleven technology transfer to Romania. Full contracts for licence production under the Rombac name followed two years later. Complete airframes and components were provided to assist in the venture. [58] All Rombac One-Elevens manufactured by Romaero were delivered to TAROM and Romavia, which leased them to airlines across both Eastern and Western Europe. Rombac-produced One-Elevens would be adopted by many emerging operators globally, including Lauda Air in Austria, and Aero Asia International in Pakistan. [59] Two planes served as the private jets of Romanian communist leaders Nicolae Ceaușescu and Ion Iliescu during 1986 to 1989. Due to the planes are "extreme rarity and significance for the technical history of Romania," they were added to the “treasure” category of Romania’s mobile cultural heritage in 2021, not allowed to leave the country. [60] Under the BAC licence, 9 planes were made in Romania. Some of them served in a small airline, LAR, its sole destination being Tel Aviv. [61]

One-Elevens remained in widespread use with European operators into the 1990s. Once retired from major operators, they were often sold to smaller airlines, often in the Far East and Africa. Nigeria was a major operator until the type was grounded after a crash in 2002. A major factor for the withdrawal from European service of remaining One-Elevens was the Stage III noise abatement regulations, which came into effect from March 2003. Bringing the Rolls-Royce Spey engines into compliance with the noise regulations with hush kits was expensive, and many European operators chose to dispose of the type from their fleets. In 2010, the European Aviation Safety Agency accepted an Airbus request to revoke the Type Certificate for the BAC One-Eleven. As a result, BAC One-Eleven aircraft registered in any EU Member State are no longer eligible for a normal certificate of airworthiness. In December 2012, the last operational One-Eleven in the UK, which had continued to fly as a military aircraft, was retired. [62] Eventually, on 7 May 2019, the last flyable One-Eleven was retired by Northrop Grumman after serving as an F-35 testbed.

Variants

The initial variants are 93.5 ft (28.5 m) long to accommodate up to 89 seats with a single overwing exit per side British Aerospace BAC One Eleven British Airways G-BBME, DUS Dusseldorf (Duesseldorf International), Germany PP1361872924.jpg
The initial variants are 93.5 ft (28.5 m) long to accommodate up to 89 seats with a single overwing exit per side
The later 500 series are 107 ft (33 m) long to accommodate up to 119 seats with two overwing exits British Caledonian BAC 111-509EW Gatwick.jpg
The later 500 series are 107 ft (33 m) long to accommodate up to 119 seats with two overwing exits
One-Eleven 200
Initial production version, 10,410 pounds-force (46.3 kN) Spey Mk 506 engines.; [63] individual customer designations within this series. 56 built. [64]
One-Eleven 217
Version for the RAAF using a 200 series fuselage with RR Spey Mk511-14 engines, low-pressure tyres, a navigator's station and a sextant hatch in the cockpit ceiling. Two built. [65]
One-Eleven 300
Uprated engines (11,400 pounds-force (51 kN) Spey Mk 511s), more fuel for longer range; [63] individual customer designations within this series. 9 built. [64]
One-Eleven 400
Series 300 with American instrumentation and equipment; [63] individual customer designations within this series. 69 built. [64]
One-Eleven 475
Series 400 body with Series 500 wing and powerplant plus rough-airfield landing gear and body protection. [66] 6 built.
One-Eleven 485GD
Similar to 475, 3 for Oman.
Rombac 1-11-495
Planned Romanian-built version of the Series 475. [34] None completed. [36]
One-Eleven 500
Extended body version with up to 119 seats and longer span wings. Fitted with more powerful engines (12,550 pounds-force (55.8 kN) Spey 512s); [66] individual customer designations within this series. 86 built. [64]
One-Eleven 510ED
Variant of the 500 series built for BEA/British Airways. Size and engines same as other 500s, cockpit modified to provide more commonality with HS.121 Trident and required a different type rating from all other 500 series One-Elevens.
Rombac 1-11-560
Romanian-built version of the Series 500. [34] Nine completed. [36]
One-Eleven 670
Series 475 with improved aerodynamics and reduced noise; one converted from Series 475. [67] [68]

Operators

The last aircraft in service, used by Northrop Grumman as an airborne testbed, was retired in 2019 British Aircraft Corporation BAC 1-11 Series 401AK, Northrop Grumman JP5644332.jpg
The last aircraft in service, used by Northrop Grumman as an airborne testbed, was retired in 2019

The BAC One-Eleven was widely used by civil and military operators.

After the One-Eleven's type certificate had been withdrawn, they flew as experimental aircraft in the research and development category. [69]

On 6 May 2019, the last aircraft still in service, used by Northrop Grumman as an airborne test bed for the F-35 programme, was retired.

Notable accidents and incidents

Accidents with fatalities

Other incidents

Aircraft on display

One-Eleven 510ED County of Dorset on display at the Imperial War Museum Duxford BAC 111-510ED 'G-AVMU' (24980480106).jpg
One-Eleven 510ED County of Dorset on display at the Imperial War Museum Duxford

Specifications

Five-abreast cabin, National Museum of Flight Main cabin of BAC One-Eleven 510ED 'G-AVMO' (25913063348).jpg
Five-abreast cabin, National Museum of Flight
Model200 [63] 300/400 [63] 475 [66] 500 [66]
Cockpit crew2
Seating limit [99] 89119
Length93 ft 6 in (28.50 m)107 ft 0 in (32.61 m)
Wing Area88 ft 6 in (26.97 m) span, 980 sq ft (91 m2) area93 ft 6 in (28.50 m) span, 1,031 sq ft (95.8 m2) area
Height24 ft 6 in (7.47 m)
Cabin Width10 ft 6 in (3.20 m)
Cabin length50 ft 0 in (15.24 m)56 ft 10 in (17.32 m)70 ft 4 in (21.44 m)
Empty weight46,312 lb (21,007 kg)48,722 lb (22,100 kg)51,731 lb (23,465 kg)54,582 lb (24,758 kg)
MTOW 78,500 lb (35,600 kg)87,000 lb (39,000 kg)98,500 lb (44,700 kg)104,500 lb (47,400 kg)
Max. payload17,688 lb (8,023 kg)22,278 lb (10,105 kg)21,269 lb (9,647 kg)26,418 lb (11,983 kg)
Engines Rolls-Royce Spey Mk 506Mk 511Mk 512-14DW
Thrust (x 2)10,410 lbf (46.3 kN)11,400 lbf (51 kN)12,550 lbf (55.8 kN)
Max. cruise476 kn; 882 km/h470 kn; 871 km/h
Ceiling35,000 ft (11,000 m)
Climb rate2,750 ft/min (14.0 m/s)2,450 ft/min (12.4 m/s)2,480 ft/min (12.6 m/s)2,280 ft/min (11.6 m/s)
Takeoff (MTOW)6,250 ft (1,900 m)6,700 ft (2,000 m)5,500 ft (1,700 m)6,500 ft (2,000 m)
Range [lower-alpha 1] 720 nmi; 1,340 km1,100 nmi; 2,040 km1,621 nmi; 3,001 km1,482 nmi; 2,744 km
  1. Typical payload, 2 hr reserve

See also

Aircraft of comparable role, configuration, and era

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Berlin Tegel "Otto Lilienthal" Airport was the former primary international airport of Berlin, the federal capital of Germany. The airport was named after aviation pioneer Otto Lilienthal and was the fourth busiest airport in Germany, with over 24 million passengers in 2019. In 2016, Tegel handled over 60% of all airline passenger traffic in Berlin. The airport served as a base for Eurowings, Ryanair as well as easyJet. It featured flights to several European metropolitan and leisure destinations as well as some intercontinental routes. It was situated in Tegel, a section of the northern borough of Reinickendorf, eight kilometres northwest of the city centre of Berlin. Tegel Airport was notable for its hexagonal main terminal building around an open square, which made walking distances as short as 30 m (100 ft) from the aircraft to the terminal exit.

<span class="mw-page-title-main">Berlin Tempelhof Airport</span> 1923–2008 airport of Berlin, Germany

Berlin Tempelhof Airport was one of the first airports in Berlin, Germany. Situated in the south-central Berlin borough of Tempelhof-Schöneberg, the airport ceased operating in 2008 amid controversy, leaving Tegel and Schönefeld as the two main airports serving the city for another twelve years until both were replaced by Berlin Brandenburg Airport in 2020.

<span class="mw-page-title-main">British European Airways</span> 1946–1974 British airline

British European Airways (BEA), formally British European Airways Corporation, was a British airline which existed from 1946 until 1974.

<span class="mw-page-title-main">Vickers VC10</span> British narrow-body airliner

The Vickers VC10 is a mid-sized, narrow-body long-range British jet airliner designed and built by Vickers-Armstrongs (Aircraft) Ltd and first flown at Brooklands, Surrey, in 1962. The VC10 is often compared to the larger Soviet Ilyushin Il-62, the two types being the only airliners to use a rear-engined quad layout, while the smaller business jet Lockheed JetStar also has this engine arrangement.

<span class="mw-page-title-main">Fokker F28 Fellowship</span> Short range jet airliner produced 1967-1987

The Fokker F28 Fellowship is a twin-engined, short-range jet airliner designed and built by Dutch aircraft manufacturer Fokker.

<span class="mw-page-title-main">Caledonian Airways</span> 1961–1970 British private charter airline

Caledonian Airways was a wholly private, independent British charter airline formed in April 1961. It began with a single 104-seat Douglas DC-7C leased from the Belgian flag carrier Sabena. Caledonian grew rapidly over the coming years to become the leading transatlantic "affinity group" charter operator by the end of the decade. During that period, passenger numbers grew from just 8,000 in 1961 to 800,000 in 1970. The latter represented 22.7% of all British non-scheduled passengers. It also became Britain's most consistently profitable and financially most secure independent airline of its era, never failing to make a profit in all its ten years of existence. By the end of 1970, Caledonian operated an all-jet fleet consisting of eleven aircraft and provided employment for over 1,000 workers. At that time, its principal activities included group charters between North America, Europe and the Far East using Boeing 707s, and general charter and inclusive tour (IT) activities in Europe utilising One-Elevens.

<span class="mw-page-title-main">Dan-Air</span> Defunct airline of the United Kingdom (1953–1992)

Dan-Air was an airline based in the United Kingdom and a wholly owned subsidiary of London-based shipbroking firm Davies and Newman. It was started in 1953 with a single aircraft. Initially, it operated cargo and passenger charter flights from Southend (1953–1955) and Blackbushe airports (1955–1960) using a variety of piston-engined aircraft before moving to a new base at Gatwick Airport in 1960, followed by expansion into inclusive tour (IT) charter flights and all-year round scheduled services. The introduction of two de Havilland Comet series 4 jet aircraft in 1966 made Dan-Air the second British independent airline after British United Airways to begin sustained jet operations.

Britannia Airways was a charter airline based in the UK. It was founded in 1961 as Euravia and became the world's largest holiday airline. Britannia's main bases were at London Gatwick, London Stansted, London Luton, Cardiff, Bristol, East Midlands, Birmingham, Manchester, Newcastle, Leeds Bradford, Liverpool, and Glasgow. It had its headquarters at Britannia House in Luton.

<span class="mw-page-title-main">Laker Airways</span> 1966–1982 private British airline

Laker Airways was a private British airline founded by Sir Freddie Laker in 1966. It was originally a charter airline flying passengers and cargo worldwide. Its head office was located at Gatwick Airport in Crawley, England.

<span class="mw-page-title-main">British United Airways</span> 1960–1970 British private airline

British United Airways (BUA) was a private, independent British airline formed as a result of the merger of Airwork Services and Hunting-Clan Air Transport in July 1960, making it the largest wholly private airline based in the United Kingdom at the time. British and Commonwealth Shipping (B&C) was the new airline's main shareholder.

<span class="mw-page-title-main">Handley Page Dart Herald</span> 1950s British turboprop passenger aircraft

The Handley Page Dart Herald is a 1950s British turboprop passenger aircraft.

<span class="mw-page-title-main">British Island Airways</span>

British Island Airways (BIA) was the legal successor to British United Island Airways (BUIA). It commenced operations under that name in mid-1970. Ten years later it merged with Air Anglia, Air Wales and Air Westward to form Air UK, at the time the United Kingdom's biggest regional airline and its third-largest scheduled operator. The first British Island Airways had its head office at Congreve House (1970–1972) and Berkeley House (1973–1979), which are respectively located in Station Road and on the high street in Redhill, Surrey.

<span class="mw-page-title-main">British Eagle</span> British airline from 1948 - 1968

British Eagle International Airlines was a major British independent airline that operated from 1948 until it went into liquidation in 1968. It operated scheduled and charter services on a domestic, international and transatlantic basis over the years.

<span class="mw-page-title-main">Hawker Siddeley Trident</span> British trijet T-tail airliner

The Hawker Siddeley HS-121 Trident is a British airliner produced by Hawker Siddeley. In 1957, de Havilland proposed its DH.121 trijet design to a British European Airways (BEA) request. By 1960, de Havilland had been acquired by Hawker Siddeley. The Trident's maiden flight happened on 9 January 1962, and it was introduced on 1 April 1964, two months after its main competitor, the Boeing 727. By the end of the programme in 1978, 117 Tridents had been produced. The Trident was withdrawn from service in 1995.

<span class="mw-page-title-main">Channel Airways</span>

Channel Airways was a private airline formed in the United Kingdom in 1946 as East Anglian Flying Services.

<span class="mw-page-title-main">Romaero</span> Romanian aerospace company

Romaero, formerly Intreprinderea de Reparatii Material Aeronautic or IRMA, is a Romanian aerospace company, headquartered in the Băneasa neighborhood of Bucharest. In recent years, it has largely concentrated on aircraft repairs as well as component manufacturing for overseas companies.

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Further reading