Wright R-760 Whirlwind
The Wright R-760 Whirlwind was a series of seven-cylinder air-cooled radial aircraft engines built by the Wright Aeronautical division of Curtiss-Wright . 
<triplet> Wright R-760 Whirlwind <subj> aircraft engine <obj> use <triplet> radial <subj> aircraft engine <obj> use <triplet> Wright Aeronautical <subj> Curtiss-Wright <obj> followed by <triplet> Curtiss-Wright <subj> Wright Aeronautical <obj> follows