Roberts 4X In-line 4 Engine

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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:

10/23/2018

Photographer:

Eric Long

ID #:

A19480187000-NASM2018-10846

Source:

Smithsonian's National Air and Space Museum

Copyright/Owner:

Smithsonian Institution

Rights Usage:

Public Domain

Rights Status:

No Known Copyright or Other Restrictions

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