The hard-working, multi-role Piasecki H-21 helicopter, known as the "Flying Banana," was the brainchild of Frank Piasecki, who founded the P-V Engineering Forum alongside his college buddy, Harold ...
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Piasecki H-21
The 1950s were an era of aircraft innovation. Engineer Frank Piasecki believed that conventional helicopters were not designed to their full potential, so he came up with a unique blueprint that would ...
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