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
A stroke is a disease, medical condition in which poor cerebral circulation, blood flow to the brain causes cell death. There are two main types of stroke: brain ischemia, ischemic, due to lack of blood flow, and intracranial hemorrhage, hemorr ...
of , for a
displacement of . Take-off power was around . The engine features steel
cylinders with aluminum-alloy
cylinder head
In an internal combustion engine, the cylinder head (often abbreviated to simply "head") sits above the cylinders and forms the roof of the combustion chamber.
In sidevalve engines, the head is a simple sheet of metal; whereas in more modern o ...
s.
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
*
Avro Anson Mk II and Mk III
*
Beechcraft Model 18D
*
Beechcraft F-17D Staggerwing
*
Fleet 50
The Fleet 50 Freighter was a Canadian twin-engine biplane general utility aircraft designed and built by Fleet Aircraft. This peculiar-looking aircraft had promise as a freighter and general use aircraft, but it was underpowered and only five we ...
*
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 FlightThe Canadian Museum of Flight - L-6
Retrieved: 31 January 2009
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.
External links
Bomber Command Museum of Canada - Nanton Lancaster Society
FAA Type Data Certificate Sheet - R-915
{{US military piston aeroengines
1930s aircraft piston engines
Aircraft air-cooled radial piston engines
Jacobs aircraft engines