Jacobs R-830


The Jacobs R-830 or L-5 is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States by the Jacobs Aircraft Engine Company, beginning in 1935.

Design and development

The R-830 was effectively an enlargement of the R-755 with strengthened stressed parts. With a bore and stroke of 5.0 in × 5.5 in the displacement was 831 cu in, takeoff power was around 285 hp. The engine features steel cylinders with aluminum-alloy cylinder heads.

Applications