The hobby of mini engine building has taken scaled creations to an extreme. These mini engines are so detailed, in fact, that sometimes nothing except perspective allows us to differentiate between the mini engines and the real thing. Believe it or not, this hand started 44cc engine has just a 3/4″ bore and 3/4″ stroke!
Giant-scale model cars (and airplanes) powered by small gasoline engines have been popular with adult racers for quite a few years now. The largest scale models available through conventional RC hobby outlets are one-fifth or one-sixth scale, but the serious racers go quarter-scale. Now the smallest (quarter-scale) blown V8 gasoline engine in commercial production is being turned out by Conley Precision Engines to power.