Pratt & Whitney R-985 Wasp Junior

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History and specifications

Conceived in 1929, this engine is one 9 star cylinders. It was designed to equip light sport, training planes, or helicopters.

Standard specifications
1st rev 1929
1st flight 1930
Capacity 16,15 L
Weight 254 kg -309 kg
Speed 2000-2300 tr/mn
Power 450 CV
Production date 1929-1953
Production 39037

Logo Pratt & Whitney
MH-1521 Broussard

MH-1521 Broussard with French Navy colour sheme
Photo CELAG - L.MONIER 1989

WS-51 Dragonfly

Westland WS-51 Dragonfly
International Helicopter Museum
Photo CELAG - F. WASSONG 1998

CELAG's specimen

CELAG has one R985-AN4 engine built under licence by Jacobs Aircraft Engine Co in 1944 with the contract n°AC-21062-DA-378. It was used on MH1521 Broussard, provided with a Hamilton Standart two-bladed propeller with variable step.

It is currently in restoration to be presented to the public.

Plaque constructeur

Pratt & Whitney R-985 Wasp Pratt & Whitney R-985 Wasp Pratt & Whitney R-985 Wasp


Versions and Use

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