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FAA clears six daylight runs past Mach 1 for Hermeus's Quarterhorse Mk 2.2
The authorization names one test aircraft, two blocks of restricted airspace over White Sands and an expiry in August 2027, and the Ramjet-X flight test service Hermeus wants to sell on top of it still needs its own paperwork.
Publishers:interestingengineering.com
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