Complex sentence: Salmson 9Ad, 46 hp (40 hp nominal power), 9-cylinder air-cooled radial engine in front, driving two-blade metal propeller (wooden in the prototype).
Split into simpler sentences: Salmson 9Ad, 46 hp (40 hp nominal power), 9-cylinder air-cooled radial engine. Two-blade metal propeller (wooden in the prototype).