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.
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.
Source: Wikipedia "Jacobs R-915" · CC BY-SA 4.0
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