The Hornet .”R” .60 is a single-cylinder engine made by Victory Tool & Die in Fresno, CA in 1945. The engine is Serial No. V6460. It has a bore of .940 and a stroke of .875 for a total displacement of .607 cubic inches. This is the 60-A version with the extra long shaft for an aircraft propeller. There was also a B version with flywheel for boats, and a C version with a race car type flywheel. This engine has a 1/4-32 spark plug thread.