The Avion was often claimed to be an all-Yugoslav design, and was not based on any foreign fighter aircraft; however, France provided considerable technical assistance in designing many of the most complex components and elements of the aircraft that Yugoslavia lacked experience with, such as the Avion's multipurpose radar system. No engine had been selected to power the Avion prior to the 1991 design freeze; however, according to Flight International, the two most likely candidates were the American General Electric F404, and the French Snecma M88 turbojet engines, the latter of which being the same engine that was later used to power the Dassault Rafale. In addition, the majority of the armaments that the fighter would have carried in service were likely have been either French-designed weapons, or would have been domestically manufactured with assistance provided by France. The design requirements for the fighter were thought to have included a thrust-to-weight ratio in excess of 1:1. The fighter's anticipated maximum speed at sea level was to be no less than Mach 1.1, while its top speed when flown at an altitude 36,000 ft (11,000m) was to have been in the vicinity of Mach 1.8. Specifications See also References External links Novi avion at vazduhoplovnetradicijesrbije.rs, retrieved 4-12-2013 Canard aircraft Cancelled military aircraft projects Delta-wing aircraft Soko aircraft