North American Sabreliner

BAE Systems Flight Systems T-39A flight test aircraft at the Mojave Airport

NA-265-60 Series 60 Sabreliner at NTPS, Mojave

The North American Sabreliner (later sold as the Rockwell Sabreliner) is a mid-sized business jet developed by North American Aviation. It was offered to the U.S. Air Force in response to their Utility Trainer Experimental (UTX) program. It was named "Sabreliner" due to the similarity of the wing and tail to North American's F-86 Sabre jet fighter."^[1] Military variants, designated T-39 Sabreliner, were used by the U.S Air Force, U.S. Navy and U.S. Marine Corps after the Air Force placed an initial order in 1959.^[3] The Sabreliner was also developed into a commercial variant.

Design and development

North American began development of the Sabreliner as an in-house project, and in response to the UTX request for proposals, they offered a military version to the Air Force. UTX combined two different roles, personnel transport and combat readiness training, into the same aircraft.^[2]

The civilian version prototype, which carried the model number NA-265, made its first flight on September 16, 1958. It was powered by a pair of General Electric YJ85 turbojet engines. The type received its FAA type certification in April 1963. The UTX candidate, designated the T-39A, was identical in configuration to the NA-265, but when the contract was awarded and the T-39A entered production, it was powered with two Pratt & Whitney JT12A-8 turbojet engines.^[2]

The civilian production version, or Series 40, was slightly refined over the prototype, with more speed and a roomier cabin. North American then stretched the design by 3 feet 2 inches, giving even greater cabin space, and marketed it as the Series 60, which was certificated in April 1967. The aerodynamics were cleaned up in the Series 60A, and the cabin made taller in the Series 75.^[2]

By 1973, North American had merged with Rockwell Standard under the name Rockwell International, and the company updated the Sabreliner designs with turbofan engines, selecting the Garrett AiResearch TFE731 for the Series 60, which became the Series 65A, and the General Electric CF700 for the Series 75A. These would be the last two versions, as Sabreliner production came to a close in 1981. The next year, Rockwell sold its Sabreliner division to a private equity firm which formed Sabreliner Corporation, the support organization for continuing operators.^[1]

Over 800 Sabreliners were produced, of which 200 were T-39s.^[2] A number of retired military T-39s have also entered the civilian world, since the military versions also carry FAA type certification. As of May 2007, fifty-six examples have been lost in accidents.^[4] The Series 65 was the last series run and 76 of them were produced, mostly for the private market. Monsanto has the oldest continuously operating company corporate jet division starting with its purchase of a Saberliner 40.^[5]

The original Navy version, the T3J-1, redesignated T-39D after the 1962 re-designation of USN/USMC/USCG aircraft, was initially fitted with the radar system from the F3H-1 Demon all-weather fighter and used as a radar trainer for pilots of that aircraft. The T-39D aircraft was subsequently introduced into the Basic Naval Aviation Observer (NAO), later Student Naval Flight Officer (SNFO) program. Three versions of the T-39D were used throughout the 1960s, 70s and 80s: one without radar for high altitude instrument navigation training and low altitude visual navigation training in the SNFO Intermediate syllabus, a second variant equipped with the APQ-126 radar from the Vought A-7 Corsair II for training primarily bombardier/navigators, reconnaissance attack navigators and electronic countermeasures officers in attack aircraft, and a third variant with the APQ-94 radar from the F-8 Crusader for training radar intercept officers in fighter aircraft.

The T-39N and T-39G are currently used in the NFO Strike and Strike Fighter syllabi in training USN and USMC Student Naval Flight Officers, various NATO/Allied/Coalition student navigators. Foreign students also train in the T-39 in place of the Beechcraft T-1 Jayhawk during the Intermediate Jet syllabus.

The Sabreliner requires a minimum crew of two, and depending on cabin configuration, can carry up to 7 passengers (NA-265 through NA-265-40) or 10 passengers (NA-265-60 and subsequent models). As a Navy flight training aircraft, it will typically fly with a pilot, one or two NFO Instructors and two to three Student NFOs or student navigators/CSOs.^[2]

Variants

Civilian

Sabreliner

(NA265 or NA246) Prototype powered by two General Electric J85-GE-X turbojet engines, one built sometimes unofficially called XT-39.

Sabreliner 40

(NA265-40 or NA282) Civil production variant for 11 passengers powered by two Pratt & Whitney JT12A-6A or -8 engines, two cabin windows each side; 65 built.

Sabreliner 40A

(NA265-40A or NA285) Model 40 with Model 75 wings, improved systems and two General Electric CF700 turbofans, three cabin windows each side.

Sabreliner 50

(NA265-50 or NA287) One built in 1964 as a Model 60 with Pratt & Whitney JT12A engines, experimental platform for radome nose cowling.

Sabreliner 60

(NA265-60 or NA306) Stretched Model 40 for 12 passengers with two Pratt & Whitney JT12A-8 engines, five cabin windows each side, 130 built.

Sabreliner 60A

Series 60 with aerodynamic design improvements.

Sabreliner 65

(NA265-65 or NA465) Based on the Series 60 with Garrett AiResearch TFE731-3R-1D engines and new super-critical wing, 76 built.

Sabreliner 75

(NA265-70 or NA370) Series 60A with a raised cabin roof for greater cabin headroom, two Pratt & Whitney JT12A-8 engines; nine built.

Sabreliner 75A

(NA265-80 or NA380) Sabreline 75 with a number of aerodynamics and systems updates, and powered by two General Electric CF700 turbofan engines, 66 built.

Military

USAF T-39A

T-39A

Pilot proficiency trainer and utility transport for the United States Air Force. Based on Sabreliner prototype but powered by two 3,000 lbf (13 kN) Pratt & Whitney J60-P3 engines, 143 built.^[6]

CT-39A

T-39A modified as a cargo and personnel transport, powered by Pratt & Whitney J60-P3/-3A engines.

NT-39A

One T-39A modified for electronic systems testing.

T-39B

Radar systems trainer for the United States Air Force, fitted with avionics of the Republic F-105D Thunderchief fighter bomber (including R-14 NASARR main radar and AN/APN-131 doppler radar) and withstations for three trainees, six built.^[7]

T-39C

Proposed radar systems trainer fitted with avionics of McDonnell F-101B Voodoo all-weather interceptor. Unbuilt.^[8]

T-39D

(NA265-20 or NA277) Radar systems trainer for the United States Navy, equipped with AN/APQ-94 radar for radar intercept officer training and the AN/APQ-126 radar for bombardier/navigator training. (T3J-1 prior to 1962 redesignation program.), 42 built.

CT-39E

United States Navy cargo/transport version, with JT12A-8 engines, originally designated VT-39E, seven second-hand aircraft.

T-39F

Electronic warfare crew training conversion of the T-39A for the United States Air Force, for training of F-105G "Wild Weasel" crews.^[9]

CT-39G

United States Navy cargo/transport version based on the stretched fuselage Sabreliner 60, Pratt & Whitney JT12A engines equipped with thrust reversers, 13 bought.

T-39G

CT-39G modified for the Undergraduate Flight Officer Training program.

U.S. Navy T-39N in Centennial of Naval Aviation commemorative paint scheme in 2011.

T-39N

Navy trainer for the Undergraduate Flight Officer Training program.

T3J

Original United States Navy designation that became the T-39D in 1962.

Operators

 Argentina

• Argentine Air Force (One series 75A)
• Argentine Army (One series 75A)

 Bolivia

• Bolivian Air Force (One series 60 FAB-001 used as a Presidential transport)

 Ecuador

• Ecuadorian Air Force

 Mexico

• Mexican Air Force
• Mexican Navy

 Sweden

• Swedish Air Force (One series 65, local designation Tp 86)

 United States

• United States Air Force (149 with T-39 designations)
• United States Navy (51 with T-39 designations)
• BAE Systems Inc. (T-39A)
• Federal Aviation Administration (Series 80)
• National Test Pilot School

Accidents and incidents

• On January 24, 1964, a USAF T-39 Sabreliner flying from West Germany on a training mission crossed into East German airspace and was shot down by a Soviet MiG-19 near Vogelsberg, killing all 3 aboard. ^[10]
• On December 21, 1975, 157352 a USN T-39E conducting a Transport Aircraft Commander-Syllabus One (TAC-1), crashed along the Mendocino Ridge, approximately 10 miles southwest of Ukiah, California. Two Navy pilots were aboard, and both were killed. ^[11]
• On April 1, 1977, 150545 a USN T-39D was conducting a low-level flight training sortie and crashed in the Laguna Mountains 8 miles east-southeast of Julian, California killing all 5 aboard.^[12]
• On April 20, 1985, 62-4496 a USAF CT-39A experienced brake failure on landing at the Wilkes-Barre Scranton International Airport, killing all 5 people aboard, including General Jerome F. O'Malley, Commander, Tactical Air Command.^{[13] [14]}
• July 12, 1988 A US Navy T-39 ditched off the coast of Vietnam after running low on fuel following failure of the aircraft's navigation issues. The crew of 3 was rescued by the Vietnamese Navy and returned to the United States. ^[15]
• On December 10, 1992, an Ecuadorian Air Force Sabreliner clipped a building and crashed in a residential area of Quito, killing all 10 people on board (including the commander of the Ecuadorian Army), and another 3 people on the ground.^{[citation needed] [16]}
• On May 8, 2002, two USN T-39s from VT-86 in Pensacola, Florida collided mid-air, 40 miles off the Gulf Coast and killed all 7 on board.^[17]
• On January 13, 2006, a USN Sabreliner conducting low-level flight training crashed in a densely forested area in rural Georgia, killing all 4 crew members.^[18]

Aircraft on display

• CT-39A at Jimmy Doolittle Air & Space Museum, Travis Air Force Base, Fairfield, California
• CT-39A at the Presidential Gallery of the National Museum of the United States Air Force^[19]
• Sabreliner 50 at Evergreen Aviation & Space Museum in McMinnville, Oregon. It was donated to the museum in January 2013 ^[20]
• T-39A at Strategic Air and Space Museum in Ashland, NE
• Sabreliner 40 at Spartan College of Aeronautics and Technology in Tulsa, Oklahoma. It was Bob Hoover's demonstration plane.

Specifications (T3J-1/T-39D)

Data from T-39 Sabreliner on Boeing History site^[1]

General characteristics

• Crew: 4–5
• Capacity: 5–7 passengers
• Length: 44 ft (13.41 m)
• Wingspan: 44 ft 6 in (13.56 m)
• Height: 16 ft (4.88 m)
• Wing area: 342.1 ft² (31.79 m²)
• Empty weight: 9,257 lb (4,199 kg)
• Loaded weight: 16,340 lb (7,412 kg)
• Max. takeoff weight: 17,760 lb (8,056 kg)
• Powerplant: 2 × Pratt & Whitney J60-P-3 turbojet, 3,000 lbf (13.3 kN) each

Performance

• Maximum speed: 478 knots (550 mph, 885 km/h)
• Cruise speed: 435 knots (500 mph, 800 km/h)
• Range: 2,170 nm (2,500 mi, 4,020 km)
• Service ceiling: 40,000+ ft (12,200+ m)
• Thrust/weight: 0.338

See also

Aircraft of comparable role, configuration and era

• Raytheon T-1 Jayhawk
• British Aerospace 125

References

Notes

Bibliography

• Type Certificate Data Sheet A2WE
• "Model Designation of Military Aerospace Vehicles" (PDF). United States Department of Defense. 2004-05-12. pp. 60–61. Retrieved 2007-01-20. 
• "The Stylish Sabreliner". Air International, Volume 11, No. 1, July 1976. pp. 7–14, 36–39.

External links

Wikimedia Commons has media related to North American Sabreliner.

• Civil support site, Sabreliner Corporation
• T-39 / CT-39 Sabreliner. GlobalSecurity.org.