Sukhoi Design Bureau began to develop the improved Su -9 fighter in 1946: Su-1 1. The basic shape of Su-1 1 is the same as that of Su -9, but according to the wind tunnel test results, the engine is hoisted from under the wing and installed in the wing, which reduces the interference resistance. In addition, the TR 1 in Lyulica also uses two engines with higher thrust. TR- 1 is the first generation jet engine in the Soviet Union, designed by Akiprulika, and its thrust reaches 1, 500 kg, which is also the beginning of long-term cooperation between Su Huoyi and Lulika.
On May 28th, 1947, Shi Yanov and Su-1/made their first flight. On August 3rd, Su-1 1 participated in the Tusino Aviation Festival. However, TR 1 finally only reached the thrust of 1 300 kg, but failed to reach the design index of 1 500 kg. The improved TR 1A will take some time. Su-1 1 Further test flight is suspended. Su-1 1 also has the problem of directional stability at high speed during the flight test. Su-1 1 kg conducted 54 test flights, totaling 2 1 hour and 8 minutes. The takeoff weight reaches 6350kg, the sea level speed is 940 km/h, the hollow speed of 3,000m is 9 10 km/h, and the ceiling is 13000m. Su-1 1 The final test flight is not suitable for mass production.
Subsequently, Su Huoyi designed an improved Su-13 fighter based on Su-1,which was dismounted before it entered the prototype manufacturing.