Sen Ki-85

The Sen Ki-85 is a single-seat supersonic fighter first flown by the Vlokouzian State Air Force in 1979. The Ki-85 was created by rebuilding former Imperial Japanese Army Air Service Nakajima Ki-84 Hayates and Nakajima Ki-43 Hayabusas from propellor-powered aircraft into supersonic fighter jets.

905 examples were rebuilt by Sen Motors at their Fusa Aircraft Production Center and by Vlokaero at the Romrac Aerospace Equipment Center.

Development
The first airplane to be rebuilt into a Ki-85 was a prototype Ki-84 with a unique exhaust stack, similar to a Ki-43's. The Nakajima Ha-45 engine and associated equipment was removed and the propeller was sawed off and a nose was installed. Next, the airplane was given a sleek, modernized look and advanced microprocessor technology was installed along with computer systems, and the cab was majorly overhauled for better visibility. Two Klimov RD-33 afterburning turbofan jet engines were installed, and experimental CB radio equipment was installed for communication between aircraft.