Among its activities, this company is dedicated to the adaptation of automobile engines for its application to homebuilt aviation.

-Especially when Stewart made his project of a reduced Mustang P-51 model, the Stewart S-51.

"Un S-51"

-For maximum resemblance to the original engines of this replica and others such as P-40, Spitfire, Hurricane, etc. water-cooled automobile Vee-engines are chosen, the most similar to the Allison and RR Merlin.

"Florida AirBoat Chevy engine"

-Chevrolet Big Block engines of 398, 454 and 502 cu. in. are chosen. With these engines the propeller elevation is, thanks to the gearbox and the exhaust outlets, almost at the correct height.