The Soviet built Mikoyan-Gurevich MiG-17 (Fresco) was initially called the MiG-15bis+45 and completed its maiden flight on January 14, 1950 and entered service in 1952. There were five variants of the MiG-17 with the MiG-17F (Fresco C) becoming the main variant. The new Klimov VK-1F engine was the first Soviet built engine with an afterburner and variable nozzle. The installation of this new engine gave the MiG-17F double the rate of climb of previous variants and greatly improved vertical maneuvers. This aircraft lacked radar and was purely a day-time fighter.