Bravehardt
0087 North American XB-70 Valkyrie North American X-15A-2
The North American XB-70,one of the world's most exotic,airplanes,was conceived for the Strategic Air Command (SAC) in the 1950s as a high-altitude bomber that could fly three times the speed of sound (Mach 3).Because of fund limitations,only two were built,not a bomber,but a research aircraft for the advance study of aerodynamics,propulsion and other subjects releated to large supersonic aircraft.
The Norh American XB-70 Valkyrie was built largely of stainless-steel honecomb sandwich panels and titanium.It was designed to make use of a phenomenon called "compression lift,"achieved when the shock wave generated by the airplane flying at supersonic speeds supports parts of the airplane's weight.For impoved stability at supersonic speeds,the North American XB-70 Valkyrie could droop its wingtips as much as 65 degrees.
The number #1 North American XB-70 masde its initial flight on September 21,1964,and achieved Mach 3 flight on October 14,1965.The number #2 airplane North American XB-70 first flew on July 17,1965,but on June 8,1966,it crashed following a mid-air collision.The number #1 airplane North American XB-70 continued in its reseach program.
North American X-15
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The NorthAmerican X-15,designed to provide datat on materail and human fators of high-speed,high-altitude flight,made the first manned probes into the lower edges of space.It was built for speeds of up to 4,000 mph and altitudes of 50 miles,but these goals were exceeded on numerous occasions.Several North American X-15 pilots earned 'astronaut" rating by attaining altitudes above 50 miles.The North American X-15 flight program contributed significantly to the Mercury project,Gemini project,and Apollo project.
The North American X-15 was carried aloft by Boeing B-52 Stratofortress and was released at about 45,000 feet and 500 mph.Its rocket engine than fired for the first 80-100 seconds of flight.The remainder of the 10-11 ninute flight was powerless and ended with a 200 mph glide landing on a dry lake bed.
The first powered North American X-15 flight was made on September 17,1959,and 199 flights were made between 1959 and 1968 by the three North American X-15s that were built.The number #3 North American X-15 was destoyed in a crash.The number #2 aircraft was retired.
0087 North American XB-70 Valkyrie North American X-15A-2
The North American XB-70,one of the world's most exotic,airplanes,was conceived for the Strategic Air Command (SAC) in the 1950s as a high-altitude bomber that could fly three times the speed of sound (Mach 3).Because of fund limitations,only two were built,not a bomber,but a research aircraft for the advance study of aerodynamics,propulsion and other subjects releated to large supersonic aircraft.
The Norh American XB-70 Valkyrie was built largely of stainless-steel honecomb sandwich panels and titanium.It was designed to make use of a phenomenon called "compression lift,"achieved when the shock wave generated by the airplane flying at supersonic speeds supports parts of the airplane's weight.For impoved stability at supersonic speeds,the North American XB-70 Valkyrie could droop its wingtips as much as 65 degrees.
The number #1 North American XB-70 masde its initial flight on September 21,1964,and achieved Mach 3 flight on October 14,1965.The number #2 airplane North American XB-70 first flew on July 17,1965,but on June 8,1966,it crashed following a mid-air collision.The number #1 airplane North American XB-70 continued in its reseach program.
North American X-15
-----------------------------
The NorthAmerican X-15,designed to provide datat on materail and human fators of high-speed,high-altitude flight,made the first manned probes into the lower edges of space.It was built for speeds of up to 4,000 mph and altitudes of 50 miles,but these goals were exceeded on numerous occasions.Several North American X-15 pilots earned 'astronaut" rating by attaining altitudes above 50 miles.The North American X-15 flight program contributed significantly to the Mercury project,Gemini project,and Apollo project.
The North American X-15 was carried aloft by Boeing B-52 Stratofortress and was released at about 45,000 feet and 500 mph.Its rocket engine than fired for the first 80-100 seconds of flight.The remainder of the 10-11 ninute flight was powerless and ended with a 200 mph glide landing on a dry lake bed.
The first powered North American X-15 flight was made on September 17,1959,and 199 flights were made between 1959 and 1968 by the three North American X-15s that were built.The number #3 North American X-15 was destoyed in a crash.The number #2 aircraft was retired.