Hispano-Suiza V Type Note: This item is currently in storage. The French Hispano-Suiza (S/N 94757) V type, 8-cylinder, liquid-cooled engine was built in 1918 in the United States by the Wright-Martin Co. The first successful aircraft cannon -- a 37mm M3 cannon -- was mounted in the vee for firing through the hollow propeller shaft. The Hispano-Suiza engine powered the SPAD XII. Transferred from the Army Aeronautical Museum. Click here to return to the Featured Accessions index.