engine
The Curtis H-15 engine is an air-cooled, horizontally opposed four-cylinder aviation engine made by the Curtis-Wright Corp. It was first introduced in 1926 and was a popular choice of engine for early airplanes due to its compact size, good power, and ease of maintenance. The engine has a displacement of 8.18 liters, a dry weight of 149 lbs and a peak power rating of 125 horsepower. The engine is built with an aluminum alloy crankcase and cylinder heads, with steel connecting rods and bearings, and an overhead camshaft driven by the crankshaft. All parts are machined to precise tolerances, resulting in an engine that is highly reliable, with a long service life.