Powerplant Will Be Unveiled At AirVenture On July 20

Sport Performance Aviation LLC (SPA) has reached a milestone with their long-anticipated Corvair 3.3L Stroker engine with the first engine run on July 14.

This engine configuration uses a stroked version of SPA’s custom U.S.-made billet crankshaft installed in a machine-clearanced case, pistons and connecting rods. This engine configuration also uses SPA’s 2nd Generation 5th Bearing, reconditioned cylinder heads and rear alternator combined with FlyCorvair’s conversion parts.

The 3.0L Corvair configuration, developed by Dan Weseman of SPA, is a 3000cc (190 cubic inches). This configuration is a popular power plant for aircraft such as the Sonex, Zenith and most recently SPA’s Panther. The stroker engine is 3300cc (200 cubic inches). The thrust of this configuration is to have a similar output of the 3.0L, but with a lower RPM to make more efficient use of propellers.

The 3.3L Corvair Stroker engine will be unveiled on July 20th on the opening day of Airventure, in the North Aircraft Display area.

After Airventure, the Stroker engine testing will continue on a test stand and then move to a 3rd party Dynamometer for output verification. SPA expects to then re-engine their prototype Panther N515XP with this engine for flight testing. Based on testing orders will be accepted in Fall of 2015.

(Images provided by SPA)

FMI: www.FlywithSPA.com