At Davenport, the largest annual antique swap meet in the US, you can find many things. This model 9-cylinder radial aircraft engine has over 600 pieces, each made by hand.
This is a 1928 BAC, designed by Louis Bac, an aircraft engineer for Peugot. It's a pacer for bicycle racing (on a boardtrack). The engine is a 2400cc twin cam OHV V-twin. They tried to get it running on Friday night at the races, but the belt (to the rear wheel) kept falling off.
Very nice Harley board tracker owned by Mike Lange.