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The Westinghouse J46 is 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.

J46
J46-WE-8 cutaway
Type Afterburning Turbojet
National origin United States
Manufacturer Westinghouse Aviation Gas Turbine Division
Major applications Convair F2Y Sea Dart
Vought F7U Cutlass
Developed from Westinghouse J34

Design and development


The J46 engine was developed as a larger, more powerful version of Westinghouse's J34 engine, about 50% larger. The Westinghouse model number was a continuation of the "X24C" series of the J34. The model number assigned was X24C10, even though the J46 differed in many design features from the smaller J34. It was seen as a lower development risk than the Westinghouse J40 which was in parallel development at the same time.

The development program ran into many problems with this engine, including the original electronic control system, compressor/turbine mismatches, combustion instability and control issues at altitude leading to compressor stalling The produced -8, -8A and -8B engines were all derated from the original design specification on both thrust and specific fuel consumption.[4]

The engine's 12-stage compressor was driven by two turbine stages on a single shaft. Early development engines included a simple "eyelid" afterburner, actuated by control rods that ran the length of the engine. By the time the engine reached production, the rear nozzle had an iris-type "petal" design. The same long control rods now pushed or pulled a ring that ran on rollers, which in turn opened or closed the iris. The original design, using an electronic control system, would have allowed continuous adjustment of afterburner thrust from minimum to maximum. This was abandoned when the electronic control could not be made acceptably reliable; the final afterburner was an "ON/OFF" unit.


Variants


Maintenance on the J46s of a F7U Cutlass aboard USS Hancock (CVA-19), 1957
Maintenance on the J46s of a F7U Cutlass aboard USS Hancock (CVA-19), 1957
J46-WE-2
J46-WE-3
3,980 lbf (18.15 kN) thrust[5] Was to be used the Douglas X-3 Stiletto. Failed to exit testing due to thrust shortfalls.
J46-WE-4/-10
3,980 lbf (20.02 kN) thrust[5] The non-A/B version of the J46-WE-2/-8B. Intended for the Douglas F3D-3 SkyKnight but did not go into production because of schedule slippage and the F3D-3 cancellation.
J46-WE-8
J46-WE-8A
This variant powered the F7U-3 Cutlass and produced 5,500/5,800 lbf of A/B thrust. All -8A engines were upgraded to the -8B build standard after being produced.
J46-WE-8B
The F7U-3 was equipped with two J46-WE-8B turbojets giving a 680 mph (1,095 km/h) max speed.[6] This variant also powered the Harvey Hustler, a speed boat designed to go faster than 275 mph.[7]
J46-WE-8
3,980 lbf (20.46 kN) (5,800 lbf (27.13 kN) thrust with afterburner)[5] This variant powered both the F7U-3 and F7U-3M, the missile-capable Cutlass.
J46-WE-12
This variant powered the F2Y Sea Dart hydroski aircraft. Basically identical to the -8/-8B, the aircraft was equipped with a fresh water spray system that flushed salt deposits out of the engine before takeoff and after shutdown.[8]
J46-WE-18
This variant produced an increased 6,100 lbf (27.1 kN) of A/B thrust for the proposed A2U-1 attack aircraft, an attack variant of the F7U. This variant was canceled with the aircraft program.[8][9]

Applications



Surviving engines



Specifications (J46-WE-8)


Data from [4][10]

General characteristics

Components

Performance


See also


Related development

Related lists


References



Notes



Bibliography



На других языках


- [en] Westinghouse J46

[fr] Westinghouse J46

Le Westinghouse J46 était un turboréacteur à postcombustion américain qui fut développé par Westinghouse Aviation Gas Turbine Division (en) pour propulser de nombreux avions de la marine militaire américaine dans les années 1950. Il devait servir de groupe propulseur à l'avion F3D-3 Skyknight[2] (version avec les ailes en flèche), qui fut finalement abandonné. Il équipa également les F2Y Sea Dart et F7U Cutlass, ainsi que la Wingfoot Express (en)[3], un véhicule de records qui parvint à atteindre 665 km/h et battit ainsi le record de vitesse terrestre le 2 octobre 1964.

[it] Westinghouse J46

Il Westinghouse J46 era un motore aeronautico turbogetto dotato di postbruciatore sviluppato negli anni cinquanta per diversi aeroplani della United States Navy.



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