One method of creating a low fidelity throwaway prototype is paper prototyping. GE built its first electric locomotive prototype in 1895. New objects can be created based on already existing objects chosen as their prototype. These were developed directly from the Hawker P.1127 prototype and the Kestrel evaluation aircraft. The Ka-50 is the production version of the V-80Sh-1 prototype. However, the high speed stability issues seen during testing of the first prototype remained. Construction of the first prototype was completed in 1968. The first Model 369 prototype flew on 27 February 1963. There was also another aircraft named Yak-25 - a light fighter prototype of 1947. The initial prototype Super Heavy will be full size. The Toyota "Jeep" BJ prototype was developed in January 1951. No YB-25 was available for prototype service tests. The initial prototype was named Lecture Quiz. This resulted in the production of seven prototype vehicles. Flight testing of the sole remaining YB-49 prototype ended 14 March 1950.