The A-3 was Charles R. Lawrance's first aircraft engine. Intended for use in the Shinnecock lightplane, this 28-hp engine was used in the Breese Penguin, a non-flying pre-flight World War I trainer.

With both pistons on the same crank throw, the A-3 vibrated fiercely. However, Army and Navy interest in his engines enabled Lawrance to experiment and design the 9-cylinder J-1 radial, which led to the famous J-5 Wright Whirlwind.

Specifications: Model A-3; two-cylinder horizontally opposed, air-cooled; 28 hp at 1400 rpm.

Accession no. 1992G46

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