Lockheed L-1011 TriStar
The Lockheed L-1011 TriStar was the third widebody passenger jet airliner to reach the marketplace, following the Boeing 747 and the Douglas DC-10. Between 1968 and 1984 Lockheed manufactured a total of 250 TriStars, many of which remain in service with charter airlines. The Royal Air Force continues to operate 9 Tristars which they acquired in the 1980s.
History
In the 1960s, American Airlines approached Lockheed and competitor Douglas with a need for an aircraft smaller than the existing 747, but still capable of flying to distant locales such as London and Latin America from company hubs in Dallas/Ft Worth and New York. Lockheed response was the L-1011 Tristar. Ironically, American Airlines never flew the "Ten Eleven," purchasing many DC-10s instead. The Tristar was launched on orders from TWA and Eastern Airlines.
First flown on November 16, 1970, the twin-aisle TriStar was considered a technological marvel of its day, featuring low noise emissions, improved reliability, and efficient operation. The main visible difference between the TriStar and DC-10 is in the middle/tail engine; the DC-10's engine is external for more power, while the TriStar's engine is integrated into the tail through an S-duct (similar to the Boeing 727) for improved quietness and stability. Although the TriStar's design schedule closely followed that of its fierce competitor, the DC-10, Douglas beat Lockheed to market by a year due to delays in powerplant development. Rolls-Royce, the maker of the TriStar's RB211 turbofan engines, had filed for bankruptcy, halting L-1011 final assembly. The British government did not approve the large state subsidy used to restart Rolls-Royce operations until after the U.S. government had guaranteed the Lockheed loans previously provided to RR for the extensive engine contract. (The UK Government also took the contentious step (for a Conservative administration) of taking the aero-engine side of RR into public ownership, to maintain national defence capability). The first TriStar was finally delivered to Eastern Airlines on April 26, 1972.
Designed for a maximum seating of 400 passengers, the TriStar utilized a new engine layout: in addition to Rolls-Royce turbofan jet engines on each wing, a third engine was located dorsally below the vertical stabilizer. Manufactured in Lockheed facilities in Palmdale, California, the TriStar faced brisk competition with the Boeing 747 and, even more directly, the Douglas (later McDonnell Douglas) DC-10/MD-10, which it closely resembled. The TriStar had a better safety record than the DC-10, and Trans World Airlines heralded the TriStar as one of the safest airplanes in the world in some of its promotional literature in the 1980s when concern over the safety record of the DC-10, which was flown by most of its competitors, was at its peak. However, the DC-10 outsold the TriStar nearly two to one, partly because of the TriStar's delayed introduction.
Nevertheless, a number of airlines flew the TriStar, including Aer Lingus, Air Atlanta Icelandic, Air Canada, Air France, Air Lanka, All Nippon Airways, Arrow Air, British Airways, BWIA, Cathay Pacific, Court Line, Delta Air Lines, which operated the largest fleet of L-1011s, Eastern Airlines, Fine Air, Gulf Air, Hawaiian Airlines, Iberia Airlines (1 example), LTU, National Airlines, Orient Thai, Pan Am, Peach Air, PSA, TAP Air Portugal, Trans World Airlines, United Airlines (acquired in the Pan Am buyout), Royal Jordanian and Saudi Arabian Airlines. The aircraft's largest operator, Delta Air Lines, retired its TriStar fleet in 2001, replacing them with the Boeing 767-400ER. TWA withdrew its last TriStar from service in 1997. Cathay Pacific eventually became the largest non-US operator of the type by acquiring many of the Eastern Airlines examples when Eastern Airlines went bankrupt, operating as many as 21 aircraft. Cathay Pacific retired its L-1011 fleet in October 1996, replacing the fleet with Airbus A330-300. Thai Sky Airlines began service in 2004 with a fleet of three Tri-Stars.
Lockheed bribed the Japanese government to subsidize ANA's purchase of L-1011s, and the resulting political scandal led to the arrest of Prime Minister Tanaka Kakuei. To this day in Japan, the name Lockheed is well-associated with scandal.
A longer-range variant of the standard-length L-1011 was developed in the late 1970s. Designated the L-1011-500, the fuselage length was shortened by 14 feet (4.3 m) to accommodate higher fuel loads.
Lockheed needed to sell 500 planes to break even. Failing to achieve profitability in the civilian airliner sector, the TriStar was to be Lockheed's last commercial aircraft. Airlines played Douglas and Lockheed off each other, driving the prices of both planes down, and the end result was Douglas' merger with McDonnell and Lockheed's departure from the commercial aircraft business.
Trivia
The TriStar's internal Lockheed model number is actually L-093.
The aging L-1011 was still in use by some airlines at the start of the 21st century, and in the late 1990s, NASA performed aerodynamic research on modified L-1011s.
The L-1011 was the first widebody to receive FAA certification for Cat-IIIc autolanding, which approved the TriStar for completely blind landings in zero-visibility weather. In theory it could even taxi to the gate in zero visibility if the airport was properly equipped.
In the ABC television series Lost, the set of the crashed plane consisted of a retired L-1011 which had been cut apart to resemble airline wreckage.
In the early 1970's, Eastern Airlines nicknamed the L-1011 Tristar "The Whisperliner".
In the early 1990's, the venerable L-1011 began making its contribution to the Space Age when Orbital Sciences began using a converted L-1011 named "The Stargazer" to launch Pegasus rockets into orbit around Earth. This venture effectively replaced the small Scout rocket, making it obsolete. *Stargazer Official Website [1]
Military service
The Tristar has also been used as a military tanker and cargo aircraft. The British Royal Air Force has nine aircraft of four variants. The aircraft are ex-British Airways and Pan Am L-1011-500s. Two of the aircraft are designated Tristar K.MK 1s and are pure tankers. Another four are KC1s and can be either tankers or cargo aircraft. The two Tristar C.Mk 2 models and the solitary Tristar C. Mk 2A are pure cargo aircraft. The C2A differs from the C2 by having military avionics and radios. The RAF's Tristars were bought in the immediate aftermath of the Falklands War to bolster the long range capability of the RAF in the transport and tanker roles. All of the aircraft serve with No. 216 Squadron, based at RAF Brize Norton.
The aircraft have seen service in many recent conflicts. Two were deployed to King Khalid International Airport, near Riyadh in Saudi Arabia during the 1991 Gulf War as tankers, with the rest used for transport between the Persian Gulf and UK. The two aircraft deployed received nose art naming them Pinky and Perky. During the 1999 Kosovo War, Tristars deployed to Ancona in Italy, again as tankers, with four aircraft involved. Tristars joined VC-10s in the AAR role for Operation Veritas (Afghanistan,) during which they provided aerial-refueling for US Navy aircraft. Their most recent wartime role was again over the skies of Iraq. The RAF deployed four Tristars during Operation Telic, to an as-yet-undisclosed location.
The Tristar is expected to remain in service with the RAF until the end of this decade, when it is scheduled to be replaced by the Airbus A330 MRTT under the Future Strategic Tanker Aircraft (FSTA) programme. The Airtanker consortium, lead by EADS, won the FSTA contract in January 2004. However beginning in April 2004 there have been continuing rumours about the fragile state of the contract negotiations. This culminated in an ultimatium by the UK's Defence Procurement Agency, delivered to EADS, demanding a reduced price for the aircraft. With continuing doubts over the FSTA programme Marshall Aerospace, responsible for the conversion of the RAF's original Tristars, have offered to buy and convert some of the large number of surplus commercial Tristars. This would give the UK a much needed increase in capacity (with the upcoming retirement of the VC-10 fleet) at a fraction of the cost of the £13Bn FSTA project.
Specifications
| L-1011-1 | L-1011-200 | L-1011-500 | |
|---|---|---|---|
| Description | |||
| Type | widebody jet airliner | ||
| Passengers | 273 | 304 | 244 |
| First flight | November 16, 1970 | ||
| Manufacturer | Lockheed Corporation | ||
| Dimensions | |||
| Length | 177 ft 8 in | 177 ft 8 in | 164 ft 2 in |
| Wingspan | 155 ft 4 in | 155 ft 4 in | 164 ft 4 in |
| Tailspan | 71 ft 7 in | 71 ft 7 in | 71 ft 7 in |
| Height | 55 ft 4 in | 55 ft 4 in | 55 ft 4 in |
| Wing area | 3456 ft² | 3456 ft² | 3541 ft² |
| Weights | |||
| Empty weight | 224,579 lb | 231,600 lb | 232,749 lb |
| Max. takeoff weight | 430,000 lb | 466,000 lb | 496,000 lb |
| Max. payload | 84,393 lb | 89,400 lb | 89,718 lb |
| Powerplant | |||
| Engine | Three Rolls-Royce RB.211-22 B | Three Rolls-Royce RB.211-524B | Three Rolls-Royce RB.211-524B |
| Thrust | 42,000 lbf | 50,000 lbf | 50,000 lbf |
| Performance | |||
| Cruise speed | .85 Mach | .83 Mach | .83 Mach |
| Range | 4000 nm | 4000 nm | 5500 nm |
| Cruise altitude | 33,650 ft | 34,000 ft | 33,000 ft |
| Service ceiling | 35,000 ft | 36,000 ft | 35,000 ft |
See also
References
- Yenne, Bill, Lockheed. Crescent Books, 1987.