Cirrus ST-50

The Cirrus ST-50, also known as the Israviation ST-50, was a turboprop development of the Cirrus VK-30 homebuilt aircraft. Cirrus designed it and built the prototype under contract to the Israeli company Israviation, keeping the VK-30 configuration but adding a larger ventral fin, a slightly larger fuselage and a Pratt and Whitney Canada PT6-135 turboprop in place of the piston engine. The prototype first flew from Duluth, Minnesota in 1994, and the type was shown at the 1997 Paris Air Show. Israviation tried to certify and market it, but it never entered production and only two were built.