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The YB-49 was the jet-powered evolution of the B-35 program
Steven Gerrard - European Champion by Stephen Doig
Wing Commander Peter Parrott DFC AFC (deceased)
Lieutenant Colonel Don Nee
Published in 1988
Faster and Higher by Stan Stokes. (B) ART201 The YB-49 was the jet-poweredSTK0145B. Faster and Higher by Stan Stokes. In late 1954 requests for proposals went out for a hypersonic aircraft capable of Mach 7 and a ceiling of 50 miles. This was to be the third aircraft in the experimental series (following the X 1 and X 2), and its mission would be to explore the upper ranges of the atmosphere at hypersonic speeds. North American won the contract in 1955. The North American X 15 research aircraft, the most successful research