Lawrance J-1

Lawrance J-1 aircraft engine at the New England Air Museum


Type:   9-cylinder, air-cooled, radial, piston
Displacement:   787 cu. in.
Weight:   476 lbs.
Power Output:   200 hp @ 1,800 rpm
Year:   1921
NEAM Id:   38
Location:   Connector between the Military and Civil Hangars

The J-1 was designed by Charles E. Lawrance in response to a request by the U.S. Navy for an air-cooled 200 hp engine for its new shipboard aircraft. Approximately 250 J-1's were produced and primarily used in the Navy Curtiss TS-1 fighter. This was the first successful fixed radial air-cooled engine to be produced in the U.S.

Lawrance Aero Engineering's limited production capacity motivated a merger, urged by the U.S. Navy, with the Wright Aeronautical to expedite the completion of the J-1 production orders. Wright's top team of George Mead and Andrew Willgoos initiated design refinements which then brought about the development of the famous Wright Whirlwind J3-B through J-6 engines.

Meade and Willgoos left Wright in 1924 to design the first “Wasp” engine and help establish Pratt & Whitney Aircraft.

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