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Like other early manufacturers, engineer Charles L. Lawrance first designed racing car engines before founding the Lawrance Aero Engine Corporation in New York City in 1917.

Although designed by Lawrance, Excelsior Auto Cycle Motor Mfg. & Supply of Chicago, Illinois manufactured the Model A-3 engine. An interesting feature of this engine was that both pistons worked on the same crank. During World War I, it was used in the non-flying Breeze Penquin training aircraft. The purpose of that aircraft was to instruct student pilots in the use of aircraft controls while running on the ground. Beginning in January 1918, 301 Breeze Penguins were procured.

Lawrance later had a very successful career with the Wright Aeronautical Corporation, particularly in its development of the famous Whirlwind series of radial engines.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date Circa 1916 Country of Origin United States of America Type PROPULSION-Reciprocating & Rotary Manufacturer Excelsior Auto Cycle Motor Mfg. & Supply (Lawrance)
 Designer Lawrance Aero Engine Corp
 Physical Description Type: Reciprocating, in-line, 2 cylinders, air-cooled Horsepower: 20.9 kW (28 hp) at 1,400 rpm Displacement: Not available Bore and Stroke: Not available Weight: Not available Dimensions Depth 105.4 cm (41.5 in.), Length 119.4 cm (47 in.), Width 85.1 cm (33.5 in.)
 Materials Steel, Aluminum, Paint, Copper, Phenolic, Textile, Rubber
 Inventory Number A19560078000 Credit Line Gift of William D. Parker Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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