The SR-71 Blackbird, which is 107 feet 5 inches long, is the world’s fastest airplane. It can fly at three tim?
The SR-71 Blackbird, which is 107 feet 5 inches long, is the world’s fastest airplane. It can fly at three times the speed of sound (Mach 3) at altitudes of 80,000 ft. When it lands after a long flight it is too hot to be touched for about 30 minutes, and is 6.0 inches longer than at takeoff. How hot is the Blackbird when it lands, assuming its coefficient of linear expansion is 24 x 10-6 K-1 and its temperature at takeoff is 23 °C?
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107 ft 5 in = 1289 in
24e-6*delta t*1289 = 6
5.076e-3 * delta t = 1
delta t = 197deg C
landing temp = 197 +23 = 220 deg C
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The SR-71 Blackbird, which is 107 feet 5 inches long, is the world’s fastest airplane. It can fly at three tim?
The SR-71 Blackbird, which is 107 feet 5 inches long, is the world’s fastest airplane. It can fly at three times the speed of sound (Mach 3) at altitudes of 80,000 ft. When it lands after a long flight it is too hot to be touched for about 30 minutes, and is 6.0 inches longer than at takeoff. How...
107 Inches To Feet
It actually is not the fastest plane. But the fastest plane did not make the circuit that was required for the official speed record, since the X-15 flew in more or less a straight line.
The North American X-15, a rocket-powered research aircraft, bridged the gap between manned flight in the atmosphere and space flight. After its initial test flights in 1959, the X-15 became the first winged aircraft to attain hypersonic velocities of Mach 4, 5, and 6 (four to six times the speed of sound) and to operate at altitudes well above 30,500 meters (100,000 feet).
It doesn't answer your question, but does set the story straight.
Not thinking too clearly at the moment but wouldn't you need to know the mass as well. I've touched a cool SR71 at Duxford museum and it was cool, I mean really cool.