Gnome-Rhône 7K
The Gnome-Rhône 7K Titan Major was a seven-cylinder 370 hp ( 270 kW ) air-cooled radial engine , that started life as an enlarged Gnome-Rhône 5K with two extra cylinders . 
<triplet> Gnome-Rhône 5K <subj> radial engine <obj> engine configuration