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1950s United States military transport aircraft
Tandem rotor helicopters
United States military helicopters
Historic American Engineering Record in Texas
1950s United States helicopters
Aircraft first flown in 1952
Single-engined piston helicopters
Piasecki Helicopter aircraft

Piasecki H-21: page information

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Page ID1596180

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Words2,742

OriginImported

CreatedJun 20, 2026, 12:27 AM

UpdatedJun 20, 2026, 12:27 AM