Pratt & Whitney Canada JT15D

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.The Development Of Jet And Turbine Aero Engines 4th Edition,Bill Gunston 2006,{{ISBN|0 7509 4477 3}},p.185. The fan for the original JT15D-1 was aerodynamically scaled to 75 lb/sec using the much larger JT9D fan.Gunston 1989, p.131.

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.{{cite journal|url=http://www.flightglobal.com/pdfarchive/view/1969/1969%20-%200289.html|title=On Test at Longueuil|journal=Flight International|date=13 February 1969|page=263}} 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.{{cite book | url=https://archive.org/details/beechcraftpursui0000phil/page/66/mode/2up | isbn=978-0-911139-11-2 | title=Beechcraft, pursuit of perfection : A history of beechcraft airplanes | date=1992 | author1=Philips | last2=Phillips | first2=Edward H. | publisher=Flying Books }}{{cite web | url=https://kingairmagazine.com/article/bygone-beechcrafts-part-two/ | title=Bygone Beechcrafts – Part Two }}

File:Pratt & Whitney Canada JT15D jet engine (Frontiers of Flight Museum).jpg]]

;JT15D-1:The first model was introduced to power the Cessna Citation I, then known as the Fanjet 500. Deliveries started in 1972, and eventually on 1,417 -1s were delivered.

;JT15D-1A:

;JT15D-1B:

;JT15D-4:Introduced in 1973, improving thrust to {{convert|2500|lbf|abbr=on}}. The -4 was the primary engine for the Cessna Citation II, and went on to find use on the Mitsubishi Diamond 1A, Aerospatiale Corvette and SIAI-Marchetti S.211. Eventually 2,195 engines of the -4 series were delivered.

;JT15D-4A:

;JT15D-4B:

;JT15D-4C:

;JT15D-4D:

;JT15D-5: Certified in 1983. The first versions delivered {{convert|2900|lbf|abbr=on}} and were used on the Beechjet 400A and Cessna T-47A. Several minor versions were introduced, the -5A for the Cessna Citation V, while the -5B powered the Beechcraft T-1A Jayhawk, the -5C the DASA Ranger 2000 and S-211A.

;JT15D-5A:

;JT15D-5B:

;JT15D-5C:

;JT15D-5D: Certified in 1993, increased thrust again, this time to {{convert|3045|lbf|abbr=on}}. The -5D is used on the Cessna UC-35A and Cessna Citation Ultra.

;JT15D-5F:

File:Solid air (537497676).jpg installation]]

• Aérospatiale Corvette
• Alenia Aermacchi M-311
• Ball-Bartoe Jetwing
• Boeing Bird of Prey
• Beechcraft Beechjet 400
• Cessna Citation I
• Cessna Citation II
• Cessna Citation V/Ultra
• EADS Barracuda
• Hawker 400
• Honda MH02
• Mitsubishi MU-300 Diamond
• Northrop Grumman X-47A Pegasus
• Raytheon T-1 Jayhawk
• Rockwell Ranger 2000
• Scaled Composites 401
• Scaled Composites ARES
• SIAI-Marchetti S.211/Aermacchi S-211
• Sport Jet II
• Stratos 716X

{{jetspecs|

| type = Turbofan

| length = {{convert|60.3|in|abbr=on}}

| diameter = {{convert|27|in|abbr=on}}

| weight = {{convert|630|lb|abbr=on}}

| compressor = Axial flow LP, centrifugal flow HP

| combustion =

| turbine =

| fueltype = Jet A/A1

| oilsystem =

| power =

| thrust = {{convert|3050|lbf|kgf kN|abbr=on}}

| compression =

| aircon =

| turbinetemp =

| fuelcon =

| specfuelcon = {{convert|0.562|tsfc|abbr=on}} at maximum thrust; {{convert|0.552|tsfc|abbr=on}} at cruise (typical)

| power/weight =

| thrust/weight = ≈ 4.58

}}

{{Reflist}}

{{refbegin}}

• Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. {{ISBN|1-85260-163-9}}

{{refend}}

{{Commons category|Pratt & Whitney Canada JT15}}

• [https://web.archive.org/web/20081226010132/http://www.pwc.ca/en/engines/jt15d PWC JT15D Product Overview page]

{{Pratt & Whitney Canada aeroengines}}

{{aeroengine-specs}}

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Category:1960s turbofan engines

JT15D

Category:Medium-bypass turbofan engines

Category:Centrifugal-flow turbojet engines