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.

Created:

10/23/2018 1:05

Photographer:

Eric Long

ID #:

A19480187000-NASM2018-10844

Source:

Smithsonian's National Air and Space Museum

Copyright/Owner:

Smithsonian Institution

Rights Usage:

Public Domain

Rights Status:

No Known Copyright or Other Restrictions

Terms of Use:

Smithsonian Terms of Use
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