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Hyper or Just Supersonic?

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In the Stan Delaplane article of Nov. 22 there is a typographical error that renders it laughable to an aerospace engineer. The article states that the Concorde travels at mach 22. I believe you meant to say mach 2.2. The world knows of no hypersonic commercial transport at this point.

RICHARD P. CARRANO

Oxnard

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