JT15D | |
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Aerocardal JT15D | |
Type | Turbofan |
National origin | Canada |
Manufacturer | Pratt & Whitney Canada |
First run | 1967 |
Major applications | Cessna Citation I Cessna Citation V Hawker 400 SIAI Marchetti S.211 |
Number built | >6,000 |
The Pratt & Whitney Canada JT15D is a small turbofan engine built by Pratt & Whitney Canada. It was introduced in 1971 at 2,200 lbf (9,800 N) thrust, and has since undergone a series of upgrades to just over 3,000 lbf (13 kN) thrust in the latest versions. It is the primary powerplant for a wide variety of smaller jet aircraft, notably business jets.
The JT15D was first run in 1967. Its use of a centrifugal compressor as the high-pressure stage in a turbofan engine was followed in 1970 by the Garrett TFE731.[1] The fan for the original JT15D-1 was aerodynamically scaled to 75 lb/sec using the much larger JT9D fan.[2]
About 70% of the air passing through the fan goes down the bypass duct. The JT15D-4 and later variants use a "booster" axial stage behind the fan which runs at the same speed as the fan and directs the remaining 30% of the air into the high-pressure compressor, after which it passes into a reverse-flow annular combustor. The hot gases flow through a high-pressure turbine that drives the centrifugal compressor, and a low-pressure turbine that drives the fan and booster.
The engine was first run in August 1967 before being test flown on an Avro Canada CF-100 Canuck in an underslung external test pod.[3] In 1975 a unique over-wing installation in place of Pratt & Whitney Canada PT6 turboprops was fitted to a Beechcraft Super King Air and flown for 93 hours to investigate the use of turbofan engines on that airframe.[4][5]
Engine | Takeoff thrust (kN) |
Continuous thrust (kN) |
Length (mm) | Fan Diameter(mm) |
Diameter.(mm) | Dry weight (kg) |
Bypass ratio |
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JT15D-1 | 9.8 | 9.3 | 1506 | 691 | 223.5 | 3.3 | |
JT15D-4 | 11.12 | 10.56 | 1600 | 686 | 253 | 2.6 | |
JT15D-4C | 11.12 | 10.56 | 1600 | 686 | 261 | 2.6 | |
JT15D-5 | 12.92 | 1600 | 287 | 2 | |||
JT15D-5A | 12.92 | 1600 | 287 | 2 | |||
JT15D-5B | 12.92 | 1600 | 292 | 2 | |||
JT15D-5C | 14.21 | 1600 | 302 | 2 | |||
JT15D-5D | 13.56 | 1531 | 520 | 686 | 292.6 | 3.3 | |
JT15D-5F | 12.92 | 1600 | 288 | 2 |
Pratt & Whitney Canada (PWC) aircraft engines and United Aircraft of Canada (UAC) aircraft
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Turbojets |
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Turbofans |
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Turboprops/Turboshafts |
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Auxiliary power units |
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Aircraft |
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See also: Pratt & Whitney aircraft engines |
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