638 hp Packard V-12
Aeroplane Photo Supply No. 1312
Although the registration number painted on the aircraft is 40216, I think this is a painting error. Both Aerofiles.com and joebaugher.com list the number as 40126.
US Air Force photo
Engine detail
According to Mendenhall's book, “The Air Racer”, C.C. Mosely raced and won while flying #63 in the 1920 Pulitzer race at 156.5 mph.
