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.
Jet stream blasts BA plane across Atlantic in record time. Boeing 777 reported at speeds of up to 745mph as it flies from New York to Heathrow in just 5 hours 16 minutes. The Boeing 777-200 jet reached a ground speed of 745mph as it rode winds of more than 200mph across the Atlantic Photo: Alamy. By Rob Crilly, New York.