The X-15 speed 5,000+ mph been flown. fastest rocket powered Helios probe 100,000+ mph Never flown.
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The fastest rocket-powered aircraft is the North American X-15, which achieved a top speed of Mach 6.7 (about 4,520 mph). If you are looking for the fastest aircraft that is not rocket-powered, the X-15 still holds the record as it used rocket engines to reach its high speeds.
Italy did not use rocket missile or rocket-powered aircraft in World War II. They may well have fired off mortar shells which were and are essentially rockets- but so did most of the combatants. Italy had some neat submarines, but not rockets.
Spacecraft and high-altitude aircraft, like spy planes or research aircraft, can fly in the thermosphere. These vehicles are specially designed to withstand the extreme temperatures and low air density in this layer of the atmosphere. Commercial airplanes do not fly in the thermosphere as they operate in the lower layers of the atmosphere.
The fastest (Non rocket powered) aircraft in the world are1. LockHeed A-12 Mach 3.35+2. SR-71 Blackbird Mach 3.2+ (Mach 3.5 un-confirmed)3. MIG-25R Foxbat-B Mack 3.24. XB-70 Valkyrie Mach 3.15. MIG-31 Mach 2.836. MIG-25 Mach 2.8Used to be the Concord Jet (Commercial)So far:IN aircraft: The space shuttle, in excess of 26000 mph.IN spacecraft, The voyager II, 35,000 mph.
The fastest aircraft used by Canada is the CF-18 Hornet, which can reach speeds up to Mach 1.8 (1.8 times the speed of sound) or approximately 2,200 km/h.
The Tupolev Tu-114 is officially proven the fastest propeller powered plane.It travels at 870kmph.But there is one unorthodox plane in the British Navy that is not officially tested but it is said to travel at 980kmph.It is Lockheed XFV-1 Salmon.