Pratt & Whitney Radial Aircraft Engine R985 Wasp Junior Aeroplane

  • 1200.00 £
  • Published date: December 28, 2022
    • Maidstone, Kent, United Kingdom

Pratt & Whitney Radial Aircraft Engine R985 Wasp Junior Aeroplane


⭕ Pratt & Whitney R-985 Wasp Junior Aircraft Radial Engine

For sale a P&W radial engine, which is an unfinished project which I have had on display in my garage for some years. I have slowly worked on the engine and frame over the years, with a view to eventually trying to start up the engine and run it.

The basic specification of the Wasp Junior R985 engine is as follows. This type of engine was used on a variety of different planes and more information can be found on the R985 by searching the Net.

Type: 9-cylinder supercharged air-cooled radial piston engine
•Bore: 5 3/16 in (132 mm), Stroke: 5 3/16 in (132 mm)
•Displacement: 985 cu in (16.14 L), Length: 41.59 in (1,056 mm)
•Diameter: 45.75 in (1,162 mm, Dry weight: 640 lb (290 kg)

Valve train: Two overhead valves per cylinder, pushrod-actuated, Supercharger: Single-speed gear-driven General Electric centrifugal supercharger, with impeller driven at 10 times crankshaft speed
•Fuel type: 80/87 grade aviation gasoline
•Reduction gear: Direct drive

Power output: 450 hp (336 kW) at 2,300 RPM for takeoff
•Specific power: 0.406 hp/in³ (18.5 kW/L)
•Compression ratio: 6.0:1
•Power-to-weight ratio: 0.625 hp/lb (1.03 kW/kg)

Model: R985-AN4

Compression Ratio: 6:1

Phone number ✆ 07924 764902
Maidstone, Kent




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