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-915A1Baseline variant; an enlarged R-755
R-915A3Similar to the A1 but with Scintilla magnetoes
R-915A4With a power take-off for autogyros
Applications
Avro Anson Mk II and Mk III
Beechcraft Model 18D
Beechcraft F-17D Staggerwing
Fleet 50
Howard DGA-15J
Kellett KD-1
Waco AQC, AGC, ARE, AVN
Engines on display
A preserved Jacobs R-915 is on display at the Nanton Lancaster Society. A Jacobs L-6 is on display at the Canadian Museum of Flight
Specifications (R-915A1)
See also
References
Notes
Bibliography
Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. Jane's Fighting Aircraft of World War II. London. Studio Editions Ltd, 1989.