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Boeing 707

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Boeing 707/720
Yugoslav Airlines 707 at Belgrade International Airport, Serbia
Type Airliner
National origin United States
Manufacturer Boeing Airplane Company
Maiden flight 20 December 1957
Produced 1958-1978
Number built 1,010
Unit cost US$4.3 million (1955 dollars)[1]
Developed from Boeing 367-80
Variants C-137 Stratoliner
VC-137 (Air Force One)

The Boeing 707 is a four-engine commercial passenger jet airliner developed by Boeing in the early 1950s. Its name is most commonly spoken as "Seven Oh Seven". Boeing delivered a total of 1,010 Boeing 707s, which dominated passenger air transport in the 1960s and remained common through the 1970s. Boeing also offered a smaller, faster version of the aircraft that was marketed as the Boeing 720.

Although it was not the first commercial jet in service (that distinction belongs to the De Havilland Comet), the 707 was the first to be commercially successful, and is credited as ushering in the Jet Age. It established Boeing as one of the largest makers of passenger aircraft, and led to the later series of aircraft with "7x7" designations.

Development

The 707 was based on an aircraft known as the 367-80. The "Dash 80" took less than two years from project launch in 1952 to rollout on 14 May 1954. This was powered by the Pratt & Whitney JT3C engine which was the civilian version of the J57 used on many military aircraft of the day including the F-100, F-101, F-102, and the B-52.

The prototype was conceived for both military and civilian use: the United States Air Force was the first customer for the design, using in the KC-135 Stratotanker midair refueling platform. It was far from certain that the passenger 707 would be profitable. At the time, Boeing was making nearly all of its money from military contracts: its last passenger transport, the Boeing 377 Stratocruiser, had netted the company a $15 million loss before it was purchased by the Air Force as the KC-97 Stratotanker.[2]

The Template:Convert fuselage of the Dash 80 was only wide enough to fit two-plus-two seating (in the manner of the Stratocruiser). Boeing soon realized that this would not provide a viable payload, so decided to widen the fuselage to Template:Convert, the same as the KC-135 Stratotanker, which would allow six-abreast seating - and the shared use of the KC-135's tooling.[3] However, Douglas had launched its DC-8 with a fuselage width of Template:Convert. The airlines liked the extra space, and so Boeing was obliged to increase the 707's cabin width again, this time to Template:Convert.[4] This meant that little of the tooling that was made for the Dash 80 was usable for the 707. The extra cost meant the 707 did not become profitable until some years after it would have if these modifications were not necessary.

The first flight of the first production 707-120 took place on 20 December 1957, and FAA certification followed on 18 September 1958. A number of changes were incorporated into the production models from the prototype. A krueger flap was installed along the leading edge. The height of the vertical fin was increased, and a small fin was added to the underside of the fuselage, and acted as a bumper during excessively nose high takeoffs.[1]

In order to become a new major player in the commercial airliner business, Boeing was quick to bend to customers' desires. While the 707-120 was the initial standard model with Pratt & Whitney JT3C engines, Qantas ordered a shorter body version called the 707-138 and Braniff ordered the higher-thrust version with Pratt & Whitney JT4A 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 the -320 but with Rolls-Royce Conway turbofan engines, making the aircraft more acceptable for the British market. British certification requirements relating to engine-out go-arounds also forced Boeing to increase the height of the tail fin on all 707 variants, as well as add a ventral fin.

Eventually, the dominant engine for the Boeing 707 family was the Pratt & Whitney JT3D, a turbofan variant of the JT3C with even lower fuel consumption as well as 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 only available as new-built aircraft as they had a stronger structure to support a maximum take-off weight increased by Template:Convert, along with minor modifications to the wing.

The ultimate 707 variant was the 707-320C, (C for "Convertible") which was fitted with a large fuselage door for cargo applications. This aircraft also had a significantly revised wing featuring three-section leading-edge flaps. This provided an additional improvement to takeoff and landing performance, as well as allowed the ventral fin to be removed (although the taller fin was retained). 707-320Bs built after 1963 used the same wing as the -320C and were known as 707-320B Advanced aircraft.

Production of the passenger 707 ended in 1978. In total, 1,010 707s were built for civil use, though many of these found their way to military service. The purpose-built military variants remained in production until 1991.

Traces of the 707 are still found in the 737, which uses a modified version of the 707's fuselage, as well as essentially the same external nose and cockpit configuration as the 707. These were also used on the previous Boeing 727, while the Boeing 757 also used the 707 fuselage cross-section. The Chinese government sponsored development of the Shanghai Y-10 during the 1970s, which was a near carbon-copy of the 707; however, this did not enter production.

Operational service

The first commercial orders for the 707 came on 13 October 1955,[3] when Pan Am committed to 20 707s and 25 Douglas DC-8s, a dramatic increase in passenger capacity over its existing fleet of propeller aircraft. The competition between the 707 and DC-8 was fierce. Several major airlines committed only to the DC-8, as Douglas Aircraft was a more established maker of passenger aircraft at the time. To stay competitive, Boeing made a late and costly decision to redesign and enlarge the 707's wing to help increase range and payload. The new version was numbered 707-320.

Pan Am was the first airline to operate the 707; the aircraft's first commercial flight was from New York to Paris on 26 October 1958. American Airlines operated the first domestic 707 flight on 25 January 1959. Airlines which had only ordered the DC-8, such as United, Delta and Eastern, were left jetless for months and lost market share on transcontinental flights.

The 707 quickly became the most popular jetliner of its time. Its popularity led to rapid developments in airport terminals, runways, airline catering, baggage handling, reservations systems and other air transport infrastructure. The advent of the 707 also led to the upgrading of air traffic control systems to prevent interference with military jet operations.[5]

File:Boac.707.arp.750pix.jpg
BOAC 707 at London Heathrow Airport in 1964.

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 was now too small to handle the increased passenger densities on the routes for which it was designed. Stretching the fuselage was not a viable option because the installation of larger, more powerful engines would in turn need a larger undercarriage, which was not feasible given the design's limited ground clearance. Boeing's answer to the problem was the first twin aisle airliner - the Boeing 747. The 707's first-generation engine technology was also rapidly becoming obsolete in the areas of noise and fuel economy.

Trans World Airlines flew the last scheduled 707 flight for passengers by a US carrier on 30 October 1983,[6] although 707s remained in scheduled service by airlines from other nations for much longer. For example Middle East Airlines (MEA) of Lebanon flew 707s and 720s in front-line passenger service until the end of the 1990s. Since LADE of Argentina took its 707-320B from regular service in 2007, Saha Airlines of Iran is the last airline to keep 707s in scheduled passenger service. Saha's 707-320C is listed for the nightly domestic flight between Tehran and Kish Island as well as a weekly flight between Tehran and Mashhad on Friday morning as of February 2008.

In 1984, a Boeing 720 that was flown by remote control was intentionally crashed at Edwards AFB as a part of the FAA and NASA Controlled Impact Demonstration program. The test provided peak accelerations during a crash.[7]

Design

Engines

File:Boeing 707 engineviewedit.jpg
View of the port (left) number 1 & 2 Pratt & Whitney JT3D jet engines of a British Caledonian Boeing 707 showing the peculiarity of the number 1 engine mount which is different from the other three, June 1975.

The 707's engines could not supply sufficient bleed air for pressurization without a serious loss of thrust, so the aircraft instead used engine-driven turbocompressors to supply high-pressure air for this purpose. On many commercial 707s the outer port (#1) engine mount is distinctly different from the other three, as this is the only engine not fitted with a turbocompressor. The Boeing 707 was the first commercially successful airliner to use podded engines.

Wings

The 707 wings are swept back at 35 degrees and, like all swept-wing aircraft, displayed an undesirable "Dutch roll" flying characteristic which manifested itself as an alternating yawing and rolling motion. Boeing already had considerable experience with this on 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 new 707 pilots had no experience with this phenomenon as they were transitioning from straight-wing propeller driven aircraft such as the Douglas DC-7 and Lockheed Constellation.

On one customer acceptance flight, where the yaw damper was turned off to familiarize the new pilots with flying techniques, a trainee pilot exacerbated the Dutch Roll motion causing a violent roll motion which tore two of the four engines off the wing. 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.[8]

In his autobiography, test pilot Tex Johnston described a Dutch Roll incident he experienced as a passenger on an early commercial 707 flight. As the aircraft's movements gradually became more severe, he went to the cockpit and found the crew frantically attempting to resolve the situation. He introduced himself and relieved the ashen-faced captain who immediately left the cockpit feeling ill. Johnston quickly stabilized the plane and later, even landed it for the crew.

Upgrades and modifications

File:Pratt-707re-N707HE-071126-03-16.jpg
Omega Air's 707-330C testbed for the 707RE program takes off from the Mojave Airport

JT8D engines

Pratt & Whitney, in a joint venture with Seven Q Seven (SQS) and Omega Air, has developed the JT8D-219 as a re-engine powerplant for Boeing 707-based aircraft, calling their modified configuration a 707RE.[9] Northrop Grumman has selected the -219 to re-engine the United States Air Force’s fleet of 19 Joint Surveillance Target Attack Radar System (E-8 Joint STARS) aircraft, which will allow the JSTARS more time on station due to the engine's greater fuel efficiency. NATO also plans to re-engine their fleet of E-3 Sentry AWACS aircraft. The -219 is publicized as being half the cost of the competing 707 re-engine powerplant, the CFM-56, and is 40dB quieter than than JT3D engines that are being replaced.[9]

Variants

Civilian

File:British Caledonian B707 G-A.jpg
British Caledonian Boeing 707 shown at Prestwick International Airport, South Ayrshire, Scotland, c. 1972.
  • 367-80 (Dash-80): The original prototype jet transport layout. Used to develop the 707, it was fitted with four Pratt & Whitney JT3C engines producing 10,000 lbf (44 kN) each. First flight was 15 July 1954.
  • 707-120: 69 of the first production 707s were built, with a longer fuselage and greater wingspan than the original Dash-80. A full set of rectangular cabin windows was included for the interior, which was capable of a seating 179 passengers. The version was designed for transcontinental routes and often required a refuelling stop when used on the North Atlantic route. It was fitted with four Pratt and Whitney JT3C-6 turbojets, civilian versions of the military J57 model, which produced Template:Convert each, allowing a Template:Convert takeoff gross weight. First flight was on 20 December 1954. Other major orders were the launch order for 20 707-121 aircraft by Pan American and an American Airlines order for 30 707-123 aircraft. Pan Am service began the 707 career on 26 October 1958.
  • 707-138: Qantas has been assigned the Boeing customer number of 38. The 13 -138 were based on the -120 but had a Template:Convert reduction to the rear fuselage and were capable of increased range.
  • 707-320 Intercontinental: A stretched version of the turbojet-powered original model, powered by JT4A-3 turbojets producing 15,800 lbst each. The interior allowed for up to 189 passengers due to a Template:Convert stretch, while a longer wing carried more fuel, increasing range by Template:Convert and allowing the aircraft to operate as true transoceanic aircraft. Takeoff weight was increased to Template:Convert. First flight was on 11 January 1958, and 69 turbojet -320s were produced.
  • 707-120B: The first major upgrade to the design was a re-engining with JT3D-3 turbofans, which were quieter, more powerful, and more fuel-efficient, producing Template:Convert each. The aircraft also received extra leading-edge slats, and the tailplane was enlarged. A total of 72 of these were built, and many more were converted from 707-120 aircraft, including Qantas' aircraft, which became 707-138B aircraft upon conversion. The first flight of the -120B was on 22 June 1960.
  • 707-320B: A re-engining of the stretched version was undertaken in parallel with the -120B, using the same JT3D-3 turbofans and incorporating many of the same airframe upgrades as well. Takeoff gross weight was increased to Template:Convert. 175 of the 707-300B aircraft were produced, as well as upgrades from original -320 models. One of the final orders was by the Iranian Government for 14 707-3J9C aircraft capable of VIP transportation, communication, and inflight refuelling tasks.
  • 707-320B Advanced: A minor improvement made available to -320B aircraft, adding three-section leading-edge flaps. These reduced takeoff and landing speeds, and also altered the lift distribution of the wing, allowing the ventral fin found on earlier 707s to be removed. The same wing was also used on the -320C.
  • 707-320C: A convertible passenger/freight configuration which ultimately became the most widely produced variant of the 707, the -320C added a strengthened floor and a new cargo door to the -320B model. 335 of these variants were built, including a small number with uprated JT3D-7 engines and a takeoff gross weight of Template:Convert. Despite the convertible option, a number of these were delivered as pure freighters.
  • 707-420: A version of the 707-320 originally produced at specific request for BOAC and powered by Rolls-Royce Conway 508 turbofans, producing Template:Convert each. Although BOAC initiated the programme, Lufthansa was the launch customer and Air India was the first to receive a 707-420 on February 18 1960. A total of 37 were built to this configuration.
  • 707-700: A test aircraft used to study the feasibility of using CFM International's CFM56 powerplants on a 707 airframe and possibly retrofitting them to existing aircraft. After a testing in 1979, N707QT, the last commercial 707 airframe, was refitted to 707-320C configuration and delivered to the Moroccan Air Force as a tanker aircraft. (This purchase was considered a "civilian" order and not a military one.) Boeing abandoned the program, since they felt it would be a threat to the Boeing 757 program. The information gathered in the test led to the eventual retrofitting program of CFM56 engines to the USAF C-135/KC-135R models, and some military versions of the 707 also used the CFM56. Ironically the Douglas DC-8 "Super 70" series by Cammacorp did develop commercially, extending the life of DC-8 airframes in a stricter noise regulatory environment, so there are today more DC-8s in commercial service than there are 707s.
  • 720: Originally designated 707-020 but later changed for marketing reasons, was a modification of the 707-120 designed for medium-range operation from shorter runways. It was lighter and faster than the Boeing 707 and had a simplified wing design. This model had few sales but was still profitable due to the minimal R&D costs associated with modifying an existing type. At one point in the promotion stage to airlines it was known as the 717, although this was the Boeing model designation of the KC-135 and remained unused for a commercial airliner until it was applied to the MD-95 following Boeing's merger with McDonnell Douglas. [10] The 720 was used before the Boeing 727 replaced it in the market. First flight was on 23 November 1959, and 64 of the original version were built.
  • 720B: The turbofan-powered version of the 720, with JT3D-1-MC6 turbofans producing Template:Convert each. Takeoff gross weight was increased to Template:Convert. 88 of these were built in addition to conversions of existing 720 models.[11]

Military

File:Australian air force 707-368C (code A20-261) Perth Internatinal Airport Australia.jpg
RAAF 707-368C, Perth International airport, Australia.
File:Air Force One SAM 27000.jpg
USAF VC-137C SAM 27000
Air Force One, 1988.
File:Usaf.e3sentry.750pix.jpg
USAF E-3 Sentry in flight.

The militaries of the United States and other countries have used the civilian 707 aircraft in a variety of roles, and under different designations. (Note: This list does not include the U.S. Air Force's C-135 Stratolifter, as it is not a 707 variant, but rather was developed parallel to the 707 from the original Boeing 367-80.)

  • C-18: The US military designation for the 707-320C.
    • C-18A:Eight second-hand (former American Airlines) 707-323Cs bought as crew trainers for the EC-18Bs, four later converted to EC-18B, two converted to EC-18D, one to C-18B and one was not taken into service and used for spares.
    • C-18B: One C-18A modified with instrumentation and equipment to support the Military Strategic and Tactical Relay System (MILSTAR).[12]
    • EC-18B: Four C-18As modified alongside the C-135 for Advanced Range Instrumentation Aircraft ARIA missions in support of the Apollo space program.[12]
    • EC-18C:Original designation for two prototype J-STAR aircraft, later redesignated E-8A.
    • EC-18D: Two C-18As modified as a Cruise Missile Mission Control Aircraft (CMMCA).[12]
    • TC-18E: Two second-hand (former Trans World Airlines) 707-331 aircraft modified for E-3 pilot and crew training.[12]
    • TC-18F: Two second-hand (former TAP) 707-382 aircraft modified for E-6 pilot training.[12]
  • C-137 Stratoliner: The USAF purchased a number of 707s under the C-137 series.
    • VC-137A:Three 707-153s with a 22-passenger VIP interior and provision for use as an airborne command post, re-designated VC-137B.
    • VC-137B:The three VC-137As re-engined with four JT3D-3 engines, operated by the 89th Military Airlift Wing, redesignated C-137B.
    • C-137B: The three VC-137Bs redesignated when downgraded from VIP role.
    • VC-137C: Two 707-353Bs were purchased by the USAF (one in 1961 and one in 1972) for service as a presidential transport with call signs SAM 26000 and SAM 27000, redesignated C-137C.
    • C-137C: The two VC-137Cs, 20043 and 20297 were redesignated when downgraded from presidential use. Two further C-137Cs were acquired by the USAF, one 707-396C a seized former arms smuggler acquired in 1985 and one 707-382B bought second hand in 1987.
    • EC-137D: Two aircraft built as Early Warning and Control System prototypes, later re-engined and re-designated E-3A. A further second-hand 707-355C aircraft was acquired and configured as an airborne special operations command post.
    • CC-137 Husky: Canadian Forces designation for the 707-347C.
    • KC-137: Aerial refueling tankers purchased by the Brazilian Air Force.[13][14]
  • E-6 Mercury: A version of the 707-320, it operates as an airborne command post and communications center, relaying instructions from the National Command Authority. Its role in relaying to the fleet ballistic missile submarines gives it the suffix TACAMO ("Take Charge and Move Out"). Only one version of the E-6 currently exists, the E-6B. The E-6B is an upgraded version of the E-6A that now includes a battlestaff area for the USSTRATCOM Airborne Command Post
  • E-8 Joint STARS: The E-8C Joint Surveillance Target Attack Radar System (Joint STARS) is a USAF airborne battle management and command and control (C2) platform that conducts ground surveillance to develop an under standing of the enemy situation and to support attack operations and targeting that contributes to the delay, disruption and destruction of enemy forces.
  • 707T/T: The 707 Tanker/Transport. Italy purchased and converted four 707s, three to tankers and one to a straight freighter. Only two 707 tankers remain operational as of 2007.[15][16] Also, Omega Air operates K707 tankers for lease.[17]
  • Condor: Airborne Early Warning, Command and Control (AEWC&C) aircraft developed in conjunction with Israel Aircraft Industries (IAI) using a former Lan Chile aircraft.

Operators

Template:Seealso Although 707s are no longer employed by major airlines 63 aircraft remain in commercial use, mainly with air cargo operators.

In the 1980s, the USAF acquired around 250 used 707s to provide parts for the KC-135E Stratotanker program.[18]

File:Tucson05 AMARCTailsMissing.jpg
Boeing 707s at AMARC being used for salvage parts for the KC-135s.

As of August 2007, commercial operators of the Boeing 707 with more than one aircraft include: African Airlines International (4), Air Charter Express (2), Angola Air Charter (3), Azza Transport (2), Beta Cargo (4), Hewa Bora Airways (3), Interair (2), Iran Air (4), Iraqi Airways (2), Libyan Arab Airlines (4), Saha Airlines (4), Sky Aviation FZE (2), Skymaster Airlines (5), Sudan Airways (2), Sudanese States Aviation (2) and TMA (5).[19] American actor John Travolta owns, and is qualified to fly as second in command, an ex-Qantas 707-138B, registration N707JT.[20]

While not used as an airliner, Honeywell is currently operating a single Boeing 720 to aid in turbine engine development. The aircraft has been modified with an extra engine nacelle to allow testing of a turbine engine at altitude. This is the last Boeing 720 in operation in the United States, flying out of Skyharbor airport in Phoenix, operating on special certification allowing it to be used for experimental use. The aircraft's experimental flight certification is set to expire in 2008 when it will be replaced.[citation needed]

The list of customer codes used by Boeing to identify specific options and trim specified by customers was started with the 707, and has been maintained through all Boeing's models. Essentially the same system as used on the earlier Boeing 377, the code consisted of two digits affixed to the model number to identify the specific aircraft version. For example, Pan American Airlines was assigned code "21." Thus a 707-300B sold to Pan Am had the model number 707-321B. The number remained constant as further aircraft were purchased, thus when Pan American purchased the 747-100 it had the model number 747-121.

Survivors

The following aircraft are on public display:

Specifications

720 (707-020) 707-120B 707-320B
Passengers 140 110 (2 class)
179 (1 class)		 147 (2 class)
202 (1 class)
Maximum Takeoff Weight (MTOW) 222,000 lb (100,800 kg) 257,000 lb (116,570 kg) 333,600 lb (151,320 kg)
Empty weight 103,145 lb (46,785 kg) 122,533 lb (55,580 kg) 146,400 lb (66,406 kg)
Takeoff run at MTOW 8,300 ft (2,515 m) 11,000 ft (3,330 m) 10,840 ft (3,280 m)
Landing run 5,750 ft (1,740 m) 6,200 ft (1,875 m) 10,840 ft (3,280 m)
Operating range (Max Payload) 3,680 NM (6,800 km) 3,680 NM (6,820 km) 3,735 NM (6,920 km)
Cruising speed 540 kn (999 km/h) 540 kn (1000 km/h) 525 kn (972 km/h)
Length 136 ft 2 in (41.25 m) 144 ft 6 in (44.07 m) 152 ft 11 in (46.61 m)
Wingspan 130 ft 10 in (39.90 m) 145 ft 9 in (44.42 m)
Tail height 41 ft 7 in (12.65 m) 42 ft 5 in (12.93 m) 42 ft 5 in (12.93 m)
Fuselage width 12 ft 4 in (3.76 m) 12 ft 4 in (3.76 m)
Powerplants (4 x) Pratt & Whitney JT3C-7:
12,000 lbf (53.3 kN) 		Pratt & Whitney JT3D-1:
17,000 lbf (75.6 kN) 		PW JT3D-3:
18,000 lbf (80 kN)
PW JT3D-7:
19,000 lbf (84.4 kN)

Sources: Boeing 707 Family, Boeing 707, Boeing 720

Deliveries

 1994   1993   1992   1991   1990   1989   1988   1987   1986   1985   1984   1983   1982 
1 1 5 14 4 5 0 9 4 3 8 8 8
 1981   1980   1979   1978   1977   1976   1975   1974   1973   1972   1971   1970   1969 
2 3 6 13 8 9 7 21 11 4 10 19 59
 1968   1967   1966   1965   1964   1963   1962   1961   1960   1959   1958   1957   1956 
111 118 83 61 38 34 68 80 91 77 8 0 0

Accidents and incidents

As of May 2007, the 707 has been in a total of 166 hull-loss occurrences[24] with 2,733 fatalities.[25]

Notable accidents

  • On 3 November 1973, Pan Am Flight 160, a 707 crashed on approach to Boston-Logan. Smoke in the cockpit caused the pilots to lose control. Three people were killed in the hull-loss accident.[1]
  • On 23 October 1996, a 707 belonging to the Argentinian Air Force crashed shortly after failing to achieve take-off speed in EZE (Buenos Aires International Airport).[28]

Popular culture

See also

Related development

Comparable aircraft

Related lists

v • d • e
Lists relating to aviation
GeneralTimeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines
MilitaryAir forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft
Notable incidents
and accidents		Military aviation · Airliners · General aviation · Famous aviation-related deaths
RecordsFlight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft

References

Notes

  1. ↑ 1.0 1.1 Bowers 1989, p. 434.
  2. ↑ Gamble in the Sky, Time, 19 July 1954.
  3. ↑ 3.0 3.1 Bowers, 1989, pg. 433.
  4. ↑ Irving 1994, p. 194–197.
  5. ↑ Jets Across the U.S., TIME, 17 November 1958.
  6. ↑ Farewell Flight, Time, 14 November 1983.
  7. ↑ Flight test experience and controlled impact of a remotely piloted jet transport aircraft, NASA-TM-4084, NASA, 1 November 1988.
  8. ↑ Accident details on Aviation Safety
  9. ↑ 9.0 9.1 Flug Revue, 12 May 2002
  10. ↑ "Historical Perspective, Start of a Proud Mission." Boeing Frontiers, July 2006.
  11. ↑ Boeing 707/720 Short History Official website.
  12. ↑ 12.0 12.1 12.2 12.3 12.4 Model Designation of Military Aerospace Vehicles, United States Department of Defense, DoD 4120.15L
  13. ↑ "Estimating KC-137 Aircraft Ownership Costs in the Brazilian Air Force", Defense Technical Information Center
  14. ↑ Brazilian Air Force information at Milavia
  15. ↑ 707 database at Airlinerlist.com
  16. ↑ Italian tankers at Airliners.net
  17. ↑ Omega K707 Civilan Tanker
  18. ↑ Global Security's KC-135E article.
  19. ↑ Flight International, 21-27 August 2007.
  20. ↑ FAA Registry: N707JT
  21. ↑ Museum of Flight: VC-137B
  22. ↑ Pima Air & Space Museum: USAF VC-137B
  23. ↑ AeroWeb: 707 at Pima Museum
  24. ↑ Boeing 707 Accident summary, Aviation-Safety.net, 5 May 2007.
  25. ↑ Boeing 707 Accident Statistics, Aviation-Safety.net, 5 July 2005.
  26. ↑ Sabena Flight 548 accident summary, Aviation-Safety.net.
  27. ↑ 707 crashed in Santa Cruz, Bolivia
  28. ↑ Argentinian Air Force crash info

Bibliography

  • Bowers, Peter M. Boeing Aircraft since 1916. London: Putnam Aeronautical Books, 1989. ISBN 0-85177-804-6.
  • Irving, Clive. Wide Body: The Making of the Boeing 747. Philadelphia: Coronet, 1994. ISBN 0-340-59983-9.
  • Wilson, Stewart. Airliners of the World. Fyshwick, Australia: Aerospace Publications Pty Ltd., 1999. ISBN 1-875671-44-7.

External links

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Template:Boeing airliners

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Boeing C-135 and 707 Military Transport Aircraft

C-135 Family: C-135 · EC-135 · KC-135 · OC-135 · RC-135 · WC-135

707/C-137 Family: E-3 · E-6 · E-8 · EC-18 · C-137 · CC-137 · KC-137 · VC-137

Template:Boeing model numbers

v • d • e
Lists relating to aviation
GeneralTimeline of aviation · Aircraft · Aircraft manufacturers · Aircraft engines · Aircraft engine manufacturers · Airports · Airlines
MilitaryAir forces · Aircraft weapons · Missiles · Unmanned aerial vehicles (UAVs) · Experimental aircraft
Notable incidents
and accidents		Military aviation · Airliners · General aviation · Famous aviation-related deaths
RecordsFlight airspeed record · Flight distance record · Flight altitude record · Flight endurance record · Most produced aircraft

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