Westinghouse J46

From Wikipedia, the free encyclopedia

The Westinghouse J46 was an afterburning turbojet engine that was developed to power several United States Navy aircraft in the 1950s. It was intended to power the improved, swept wing, F3D-3 Skyknight (swept-wing version^[1] ultimately canceled). It also powered the F2Y Sea Dart and the F7U Cutlass jets, and Walt Arfon's Wingfoot Express^[2]^[3] land speed-record car.

Development and Design

The J46 engine was developed as a larger, more powerful version of Westinghouse's J34 engine, about 50% larger. The development program ran into many problems with this engine, including combustion instability and control issues at altitude.^[4]

The engine featured an 11-stage compressor that was driven by two turbine stages on a single spool. The engine also featured an early afterburner, which was a simple "eyelid" design that was actuated by a long control rod that ran the length of the engine.^[4]

Variants

Maintenance on the J46s of a F7U Cutlass aboard USS Hancock (CVA-19), 1957.

J46-WE-8: This variant powered the F7U Cutlass and produced 4800 lbf (21.4 kN) of dry thrust. The F7U-3 was re-engined with two J46-WE-8B turbojets giving a 680 mph (1,095 km/h) max speed.^[5] This variant also powered the Harvey Hustler, a speed boat designed to go faster than 275 mph.^[6]
J46-WE-18:This variant would have produced an increased 6100 lbf (27.1 kN) of dry thrust for the proposed A2U attack aircraft, an attack variant of the F7U. This variant was canceled with the aircraft program.^[7]
J46-WE-12:This variant powered the F2Y Sea Dart hydroski aircraft. It was equipped with a fresh water spray system that flushed salt deposits out of the engine before takeoff.^[7]

Specifications (J46-WE-8)

Data from ^[4]^[8]

General characteristics

Type: Afterburning Turbojet
Length: 198 in (5.0 m)
Diameter: 34 in (0.86 m)
Dry weight: 2100 lb (952.5 kg)

Components

Compressor: Single-Spool, 11-stage Axial
Combustors: Annular
Turbine: 2-stage turbine

Performance

Maximum thrust: 4800 lbf (21.4 kN) dry, 6,000 lbf (26.7 kN) afterburning
Overall pressure ratio: 6:1
Thrust-to-weight ratio: 2.3:1 dry, 2.9:1 afterburning

Survivors

Carolinas Aviation Museum, engine collection includes four (4) in storage, three came from Florida
Wings Over the Rockies Air and Space Museum, engine collection, dash 8 cutaway on display (see photo above)

References

↑ Vectorsite.net: F3D Skynight
↑ Air & Space Magazine,March 01, 2009, Oldies and Oddities: The Bonneville Jet Wars
↑ Air & Space Magazine,March 01, 2009, Oldies and Oddities: The Bonneville Jet Wars Photos
↑ 4.0 4.1 4.2 Aero Engines 1954 (1954). Flight. 9 Apr 1954. pg 461
↑ History Wars Weapons: F7U Cutlass
↑ Cady, Steve (1965). Californians Seek Water Speed Mark. The New York Times, 28 Nov 1965. pg. S11.
↑ 7.0 7.1 Aero Engines 1956 (1956). Flight. 11 May 1956, pg. 596
↑ Westinghouse Turbojets (1953). Flight. 13 Nov 1953. pg 642

v t e Westinghouse aircraft engines

Turbojets	J30 J32 J34 J40 J43 J45 J46 XJ54 J81

Turboprops/Turboshafts	T30 T70

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 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 T800

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 F135 F136 F137 F138 F400 F401 F402 F404 F405 F408 F412 F414 F415

v t e Lists relating to aviation

General	Aircraft manufacturers Aircraft engines manufacturers Gliders Airlines defunct Airports Civil authorities Museums Registration prefixes Rotorcraft manufacturers Timeline

Military	Air forces Weapons Experimental Missiles Unmanned

Accidents/incidents	Commercial airliners by location Fatalities by death toll General aviation Military

Records	Airspeed Altitude Distance Endurance Firsts Large Most-produced aircraft Most-produced rotorcraft

This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.