Jacobs R-915


The Jacobs R-915 or Jacobs L-6 is a seven-cylinder, air-cooled, radial engine for aircraft manufactured in the United States, production started in 1936.

Design and development

The R-915 was effectively an enlargement of the R-755 with strengthened stressed parts. With a bore and stroke of, for a displacement of. Take-off power was around. The engine features steel cylinders with aluminum-alloy cylinder heads.

Variants

;R-915A1:Baseline variant; an enlarged R-755
;R-915A3:Similar to the A1 but with Scintilla magnetoes
;R-915A4:With a power take-off for autogyros

Applications