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