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Jacobs Aircraft Engine Co.


 The Company




Model Military Number Name
1933 L-4 R-755  
The Jacobs Aircraft Engine Company was formed in 1929 in Philadelphia.  Later the company moved to Pottstown, Pennsylvania.

An early product was a small 55 hp 3 cylinder engine.  By 1933, Jacobs had developed its most famous engine, the L-4, better known as by its military designation, the R-755.

After World War II, Jacobs became a division of Republic Industries (not Republic Aircraft).  Jacobs type certificates are currently held by Air Repair, Inc.


Related Websites

The Lancaster Museum website (Jacobs Engine page)



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Kenneth W Shanaberger 2000 - 2010