The Soviet MiG-17 fighter was indeed built to become more stable than its predecessor, The MiG-15 was unstable at high rate and too tight a big change could trigger an uncontrolled snap roll and spin. To conquer this dilemma, the fuselage finished up being lengthened, small 'fences' were set up regarding top aspects of this wing to regulate airflow, plus the wings swept straight back 45 degrees. The excess space to the fuselage enabled the inner design and systems become revised, and a far more angular end was added. These changes offered the aircraft great security, necessary for a successful tools platform. The MiG-17 joined frontline solution in February, 1953. The Fresco-A maintained the first VK-1 turbojet for the MiG-15. A VK -1F engine with afterburner had been then suited to the latest Fresco-C, or MiG -17F . A fixed-scan radar had been placed into the MiG-17PF, or Fresco-D. The MiG-17PFU, Fresco-E, became the Soviet Union's very first interceptor using its cannon deleted and four air-to-air missiles included.