Proprotor with folding blades is mounted on a sled for track testing at flight-representative speeds. Credit: Bell A sled track normally used to test ejection seats has been employed by Bell to ...
A high-speed sled was recovered after accelerating to around Mach 5.6 on a 10-mi.-long, 9-in.-wide monorail track in the New Mexico desert, the U.S. Air Force said on June 2. The late-March test on ...
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