Subsequent work on the next versions of the Su-9 and Su-11 produced in 1947 a design of aircraft entitled "TK," or Su-13. The aircraft's basic design configuration was left unchanged; the wing area was expanded from 20.2m2 to 24.8m2; moreover, in order to increase the machine's critical Mach number, the airfoil thickness ratio was decreased from 12% to 9%, with a swept horizontal tail unit introduced. The aeroplane was designed in two variants, which differed in the array of equipment and weapons. The frontline fighter featured three 37mm cannons, and the fighter/interceptor variant featured two 37mm cannons and a Tory radar scanner. The aeroplane was expected to feature a pressurised cockpit. To increase the flight range up to 2,300 km, the aircraft was also intended to carry additional fuel tanks in the engine nacelles and external fuel tanks.
Two prototypes of the aircraft were planned to be built at plant No 381, but even with the shop drawings completed in their entirety, the failure of the USSR MAI to make a decision made it impossible to start work, there having been just some assembly tooling and a few wing parts produced.
In the summer of 1946, acting on their own initiative, the Design Bureau developed a conceptual design of a two-seat training aircraft with two RD-10 engines meant for training pilots to fly turbojet aeroplanes. The aeroplane's design was similar to that of the Su-9, with an unarmoured two-seat cockpit and two 20mm cannons being the only differences.
The opinion on the conceptual design said that ". In the light of the extreme need of the USSR Air Forces for the aircraft under design, it is imperative that the building of a prototype of aircraft be accelerated to make sure it will be available for governmental testing in January-February 1947." Nevertheless, that project, too, failed to be carried through.
|Join the GlobalSecurity.org mailing list|