The Model 4X engine was built by the Roberts Motor Company of Sandusky, Ohio. An important design objective was light weight, which was achieved through the extensive use of aluminum and magnesium alloys in the cylinders and crankcase, and a hollow crankshaft. This engine was manufactured in 1911 and powered a Curtiss-type, float-equipped aircraft (hydroplane) built by Harry H. Ford. Highlighted in this image are gears of the Roberts 4X In-line 4 Engine.
Created by
Eric Long
Date Created
10/23/2018
Source
Smithsonian National Air and Space Museum
Keywords
Aviation; Engines; Piston; Pre-WWI; Propulsion
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