Ackermand et al.(2006): Lazulite-bearing metaquartzite of the Itremo Group (Central Madagascar); Scientific significance and economic importance in Proceedings of the Malagasy-German Research Cooperation in Life and Earth sciences, 5-18
The fastest fighter aircraft is the MiG 25, with speeds topping at Mach 3.2 (2,450 mph/4,000 km/h). Pilots were not allowed to go beyond Mach 2.8. Above Mach 2.8, the engines would overheat and burn up.
The single-seat, single-engine aircraft features advanced stealth capabilities, combined with improved avionics and sensors. The F-35 has a maximum speed of Mach 1.6, which is 1.6 times the speed of sound, or about 1,200 mph (1,930 km/h). Despite boasting of unparalleled capabilities, the F-35 program has been plagued by delays and cost overruns.