The engine collection at the Airpower Museum contains many vintage engines, including these two early "hot-water 8’s", a Hisso (Hispano-Suiza) and Curtiss OXX-6.
A selection of engines in the main exhibit area, including a number of radials.
Included in the collection is the remaining factory materials of the Ken-Royce engines from their plant in Kansas City, Missouri. the Ken-Royce materials were donated by the Rearwin family, who owned the Rearwin Aircraft Company and the Ken-Royce engine
