Pratt & Whitney T73 - Misplaced Pages

(Redirected from Pratt & Whitney JFTD12-4A) Turboshaft engine

T73/JFTD12

JFTD12-4A mounted on an Erickson S-64E Aircrane
Type	Turboshaft
National origin	United States
Manufacturer	Pratt & Whitney
Major applications	Sikorsky CH-54 Tarhe Sikorsky S-64 Skycrane
Number built	352
Developed from	Pratt & Whitney JT12

The Pratt & Whitney T73 (company designation JFTD12) is a turboshaft engine. Based on the JT12A, the T73 powered the Sikorsky CH-54 Tarhe and its civil counterpart Sikorsky S-64 Skycrane flying crane heavy-lift helicopters. Turboshaft versions for naval use are known as the FT12.

Variants

T73-P-1: Basic military model, rated at 4,500 horsepower (3,355 kW) takeoff power and 4,000 horsepower (2,982 kW) maximum continuous power

T73-P-700: Higher-power military model with improved internal components; rated at 4,800 horsepower (3,579 kW) takeoff power and 4,430 horsepower (3,303 kW) maximum continuous power

JFTD12A-3

JFTD12A-4A: Civilian equivalent of T73-P-1

JFTD12A-5A: Civilian equivalent of T73-P-700

FT12: Marine powerplant

Applications

Sikorsky CH-54 Tarhe (T73)
Sikorsky S-64 Skycrane/Erickson Air-Crane S-64 Skycrane (JTFD12)

Specifications (T73-P-1)

Data from FAA Type Certificate E15EA

General characteristics

Type: Turboshaft
Length: 107.0 in (2,718 mm)
Diameter: 30.0 in (762 mm) maximum
Dry weight: 966 lbs (438 kg)

Components

Compressor: nine stage axial compressor
Combustors: eight cans in annular configuration
Turbine: axial two stage gas generator turbine and axial two stage free turbine
Fuel type: aviation kerosene conforming to MIL-I-5161 E Grade I or II

Performance

Maximum power output: 4,500 horsepower (3,355 kW) takeoff, 4,000 horsepower (2,982 kW) maximum continuous; at sea level at or below -8°C (17°F)
Turbine inlet temperature: 688°C (1270°F)
Power-to-weight ratio: 4.66 hp/lb (7.66 kW/kg)

References

Connors, p.285
Greg Goebel's Vectorsite
Pratt & Whitney JT12 (United States), Aero-engines - Turbojet, Jane's Information Group, 2011.05.09
^ Type Certificate Data Sheet E15EA, US DoT - FAA, 2011.09.12

Connors, Jack (2010). The Engines of Pratt & Whitney: A Technical History. Reston. Virginia: American Institute of Aeronautics and Astronautics. ISBN 978-1-60086-711-8.
Federal Aviation Administration Type Certificate Number E15EA, Revision 8 retrieved 14 February 2014

External links

Atlantic Canadian Aviation: JT12 for Canadair aircraft

v t e Pratt & Whitney aircraft engines
Radial engines	R-985 R-1340 R-1535 R-1690 R-1830 R-1860 R-2000 R-2060 R-2180-A R-2180-E R-2270 R-2800 R-4360 Double Wasp Hornet (A) Hornet B Twin Hornet Twin Wasp (R-1830) Twin Wasp (R-2000) Twin Wasp E Twin Wasp Junior Wasp series Wasp Wasp Junior Wasp Major Yellow Jacket
H piston engines	X-1800/XH-2600 XH-3130 (XH-3730)
Free-piston gas turbines	PT1
Turbojets	JT3C JT4A JT6 JT7 JT8A JT9 JT11 JT12 J42 J48 J52 J57 J58 J60 J75 J91
Turbofans	GP7000† JT3D JT4D JT8D JT9D JTF10 JTF10A JT10D JTF14 JTF16 JTF17 JTF22 PW1000G PW1120 PW2000 PW4000 PW5000 PW6000 RTF-180† STF200 SuperFan† V2500† F100 F105 F117 F119 F135 F401 RM8† TF30 TF33 XA101 XA103
Turboprops/Turboshafts	APW34† JFTD12 PT2 PT3 PT4 PT5 T34 XT45 T52 XT57 T73 T800-APW† T900†
Propfans	578-DX†
Rocket engines	RL10 XLR-129
Aeroderivative gas turbine engines	GG3/FT3 GG4/FT4 FT8
Subsidiaries	Pratt & Whitney Canada Pratt & Whitney Rocketdyne
Key people	Leonard S. Hobbs George J. Mead Wright Parkins Perry Pratt Frederick Rentschler Richard "Dick" Soderberg Andrew Willgoos
† Joint development aeroengines See also: Pratt & Whitney Canada aeroengines

v t e United States military gas turbine aircraft engine designation system
Turbojets	J30 J31 J32 J33 J34 J35 J36 J37 XJ38 J39 J40 XJ41 J42 J43 J44 J45 J46 J47 J48 XJ49 J51 J52 J53 J54 J55 J56 J57 J58 J59 J60 J61 J63 J65 J67 J69 J71 J73 J75 J79 J81 J83 J85 J87 J89 J91 YJ93 J95 J97 J99 J100 YJ101 J102 J400 J401 J402 J403 J700
Turboprops/ Turboshafts	T30 T31 T33 T34 T35 T36 T37 T38 T39 T40 T41 T42 T43 T44 T45 T46 T47 T48 T49 T50 T51 T52 T53 T54 T55 T56 (variants) T57 T58 T60 T61 T62 T63 T64 T65 T66 T67 T68 T69 T70 T71 T72 T73 T74 T76 T78 T80 T100 T101 T400 T405 T406 T407 T408 T700 T701 T702 T703 T706 T708 LHTEC T800 APW T800 T900 T901
Turbofans	TF30 TF31 TF32 TF33 TF34 TF35 TF37 TF39 TF41 F100 F101 F102 F103 F104 F105 F106 F107 F108 F109 F110 F112 F113 F117 F118 F119 YF120 F121 F122 F124 F125 F126 F127 F128 F129 F130 F135 F136 F137 F138 F400 F401 F402 F404 F405 F408 F412 F414 F415
Adaptive cycle engines	XA100 XA101 XA102 XA103

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