Wright J65

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Wright J65

The Wright J65 was an American turbojet engine based on the Armstrong Siddeley Sapphire .

history

Curtiss-Wright had acquired a manufacturing license for the Sapphire in 1950 to adapt it to American needs. From 1953 on it was produced in larger series. The market launch was actually planned for 1951, but delays in production meant that it could only be delivered two years later. That is why only comparatively small numbers were achieved, because the demand in this performance class had largely covered the Pratt & Whitney J57 .

It was and remained the only jet engine from Curtiss-Wright and with the cessation of its production the company gave up the engine construction completely.

construction

The J65 is a single shaft engine. The axial compressor has 7 low pressure and 5 high pressure stages. The blades of the first 3 stages are made of steel, those of stages 4 to 7 are made of aluminum and the last ones in stages 8 to 13 are made of stainless steel. The compressor has ball bearings at the front and a roller bearing at the rear . The compressor housing is made of an aluminum alloy. The pressure ratio is 7: 1, the air mass passed through at the operating point is 55.3 kg / s.

With the J65, combustion takes place in an annular combustion chamber with 36 injection nozzles. The turbine is designed in two stages. Both stages are connected with taper pins. The first stage has 110 blades, the second 75. The turbine set is mounted on ball bearings towards the combustion chamber. The turbine inlet temperature is 802 ° C. The jet pipe is made of steel. The engine control is done hydraulically according to manual specifications by controlling the fuel flow. For lubrication, the engine has a closed oil circuit with a container of 18.9 liters. 2 gear pumps and 2 piston pumps ensure the oil circulation.

There are 3 attachment points for installation in the aircraft.

The engine is started, depending on the version, either with an electric starter, a small gas turbine (APU), with the help of a starter cartridge or with a pneumatic starter.

Executions

  • J65-W-3, gas turbine starter. Used on the Republic F-84 F Thunderstreak.
  • J65-B-3, like W-3, but made by Buick .
  • J65-W-5, starting with a starter cartridge for the Martin B-57 .
  • J65-W-7, gas turbine starter, used on the Republic RF-84F Thunderflash .
  • J65-B-7, like W-7, but made by Buick.
  • J65-W-16A, with pneumatic starter for the North American F-1 E and AF-1E Fury.
  • J65-W-16C, with pneumatic starter for the Douglas A-4 Skyhawk.

Technical specifications

Length [mm] Diameter [mm] Weight [kg] Thrust [kN] Specific consumption [kg / (kN · h)]
W-3 2921 953 1178 32.15 92.9
W-5 2921 953 1178 32.06 92.9
W-7 2921 953 1268 34.74 90.3
W-16A 3098 953 1244 34.74 92.9
W-16C 3098 953 1244 37.85 92.9

Web links

Commons : Wright J65  - Collection of Images, Videos and Audio Files

Individual evidence

  1. ↑ Description of J65 on flightglobal.com