Jacobs R-915
330 HP RADIAL AIRCRAFT ENGINE
Jacobs L-6; Air Repair Incorporated L-6; Jacobs Model L-6; Jacobs R-915-1
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.Gunston 1989, p.