The Yakovlev Yak-19 (Russian: Як-19, USAF/DOD designation Type 7) was a prototype Soviet fighter built in late 1940s. It was the first Soviet aircraft to be equipped with an afterburning turbojet, the Klimov RD-10F that was derived from the German Jumo 004 engine. Only two examples were built as it was rejected for service by the Soviet Air Force. Development and description In April 1946, the Council of People's Commissars ordered several design bureaux (OKB – Opytnoye Konstruktorskoye Buro), included that of Alexander Yakovlev, to develop a single-seat jet fighter to be equipped with a single Lyulka TR-1 turbojet engine. The aircraft should have a maximum speed of at sea level and a speed of at an altitude of . It should be able to climb to that altitude in 3.8 minutes or less and should have a maximum range of no less than . Yakovlev and his team were well aware that any derivative of their earlier Yak-15 and Yak-17 fighters, then under development, could not reach the required speed because of their thick wings and chose to begin a "clean-slate" design. Preliminary work used the same "pod-and-boom" layout as had been used in the earlier Yakovlev designs, although the cockpit was located in front of the engine. The TR-1 engine was plagued by delays and Yakovlev devoted most of his efforts to designs that used the RD-10. By late June, Yakovlev had decided to use a more aerodynamically efficient "tubular" layout with the engine buried in the center of the fuselage. After it became clear that neither the TR-1, nor the imported British Rolls-Royce Nene or Rolls-Royce Derwent engines would be available to power the prototypes, Yakovlev settled on the newly available afterburning version of the RD-10. The first prototype was ordered to a very demanding schedule and was completed on 29 November 1946. The Yak-19 had an flattened oval-shaped, metal semi-monocoque fuselage with the single-seat cockpit and its teardrop-shaped canopy positioned just forward of the axial-flow RD-10F turbojet engine. Its air intake was in the nose and the afterburner was positioned at the rear of the fuselage, just below the tail structure. Fitted with tricycle landing gear, the main landing gear retracted inwards into the fuselage while the nose gear retracted forwards. The laminar-flow, two-spar, straight wing was mounted in the middle of the fuselage. It was equipped with modified Fowler flaps and Frise ailerons. The rudder