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 5.5 x, for a displacement of 915 cuin. Take-off power was around 330 hp. 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

 * 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