Pratt and Whitney J57

Design and development

The J57 was a development of the XT45 (PT4) turboprop engine intended for the XB-52. As the B-52 power requirements grew, the design evolved into a turbojet, the JT3. The prestigious Collier Trophy for 1952 was awarded to Leonard S. Hobbs, Chief Engineer of United Aircraft Corporation, for "designing and producing the P&W J57 turbojet engine". On May 25, 1953, a J57-powered YF-100A exceeded Mach 1 on its maiden flight. The engine was produced from 1951 to 1965 with a total of 21,170 built.

One XT57 was installed in the nose of a JC-124C (BuNo 52-1069), and tested in 1956.

Variants

J57-P-1W

11,400 lbf (51 kN) s.t with water injection (B-52B)

J57-P-1WA

As P-1W

J57-P-1WB

As P-1W

YJ57-P-3

8,700 lbf (39 kN) thrust, used in the Convair YB-60

J57-P-4A

16,200 lbf (72.06 kN) thrust

J57-P-8A

10,400 lbf (46.26 kN) thrust

J57-P-10

12,400 lbf (55.16 kN) thrust

J57-P-11

9,700 lbf (43.15 kN) thrust, 14,800 lbf (65.83 kN) thrust

J57-P-13

14,880 lbf (66.19 kN) thrust

J57-P-16

16,900 lbf (75.17 kN) thrust

J57-P-20

18,000 lbf (80.07 kN) thrust

J57-P-20A

18,000 lbf (80.07 kN) thrust

J57-P-21

17,000 lbf (75.62 kN) thrust

J57-P-25

15,000 lbf (66.72 kN) thrust

J57-P-31

J57-P-37A

J57-P-43W

13,750 lbf (61.16 kN) thrust

J57-P-43WB

13,750 lbf (61.16 kN) thrust

J57-P-59W

13,750 lbf (61.16 kN) thrust

T57

15,000 hp (11,185.50 kW) turboprop

JT3C-2

Civilian derivative of the J57-P-43WB, 13,750 lbf (61.16 kN) thrust

JT3C-6

13,500 lbf (60.05 kN) thrust

JT3C-7

12,000 lbf (53.38 kN) thrust

JT3C-12

13,000 lbf (57.83 kN) thrust

JT3C-26

Civilian derivative of the J57-P-20, 18,000 lbf (80.07 kN) thrustJT3D/TF33:A turbo-fan derivative of the J57.

PT5

Company designation for the T57.

Applications

J57 (Military)

Boeing B-52 Stratofortress (dash 1W, 1WA, 1WB)

Boeing C-135 Stratolifter and KC-135 Stratotanker

Convair F-102 Delta Dagger (dash 25)

Convair YB-60 (dash 3)

Douglas A3D Skywarrior (dash 10)

Douglas F4D Skyray (dash 8, 8A, 8B)

Douglas F5D Skylancer

Lockheed U-2

Martin B-57 Canberra

McDonnell F-101 Voodoo (dash 55)

North American F-100 Super Sabre (dash 21 and 21A)

Northrop SM-62 Snark

Vought F-8 Crusader (dash 8)

JT3C (Civilian)

Boeing 707

Boeing 720

Douglas DC-8

T57 turboprop

Douglas C-124 Globemaster II testbed

Douglas C-132 (not built)

Engines on display

There is a J57 cutaway at the New England Air Museum, Bradley International Airport, Windsor Locks, CT.

Specifications (JT3C-7)

Data from Flight

General characteristics

Type: civil turbojet

Length: 155in (3937mm)

Diameter: 39in (9906mm)

Dry weight: 4200lb (1905kg)

Components

Compressor: all-axial, 9-stage LP compressor, 7-stage HP compressor

Combustors: cannular, 8 flame tubes

Turbine: all-axial,single stage HP turbine, 2-stage LP turbine

Performance

Maximum thrust: 12030 lbf (53.5 kN) @ Take-off, SLS, ISA

Overall pressure ratio: 12.5:1

Air mass flow: 180 lb/s (81.65 kg/s)

Specific fuel consumption: 0.785 lb/(h lbf) (22.24 g/(s kN)) @ Take-off, SLS, ISA and 0.909 lb/(h lbf) (25.75g/(s kN)) @Max Cruise 3550 lbf M0.85,35000 ft,ISA

Thrust-to-weight ratio: 3.44

Specifications (J57-P-23)

Data from

General characteristics

Type: Afterburning turbojet

Length: 244 in (620 cm)

Diameter: 39 in (100 cm)

Dry weight: 5,175 lb (2,347 kg)

Components

Compressor: Two-spool 16-stage axial compressor

Performance

Maximum thrust: 11,700 lbf (52.0 kN) dry, 17,200 lbf (76.5 kN) with afterburner

Overall pressure ratio: 11.5:1

Air mass flow: 165 lb/s (75 kg/s) at maximum power

Turbine inlet temperature: 1,600 °F (870 °C)

Specific fuel consumption: 2.10 lb/(lbf·h) (59 g/(kN·s)) with afterburner

Thrust-to-weight ratio: 3.32:1 (32.6 N/kg)