NASA 50th Anniversary Moment: Sharon Stack
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Sharon Stack: "The X-43A was exactly a subscale of the national aerospace plane. And it was built and scaled so it would fit in the eight-foot tunnel. The goal was to use the same, instead of messing around with scale issues, you have the vehicle that you can test in the eight-foot tunnel here. High temperature tunnel. And also fly it. And that was the goal. and it – there were analyses done to see how small can we go, and still get reasonable scramjet-- the scramjet engine is the reason for that test. Now aerodynamics -- I'm from the aerodynamics side of the house but with NASP and with the Hyper-X or the X-43A, I really mixed it up a lot with the propulsion boys, that's what we call them. So I did learn a little bit. I never got used to them always showing aircraft upside-down, engine on the top."
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