Convertawings Model E Quadrotor helicopter. Figure 4, from Vertiflite (AHS Newsletter) Aug 1956.
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Convertawings Model E Quadrotor helicopter

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Convertawings Model E Quadrotor helicopter.

Figure 4, from Vertiflite (AHS Newsletter) Aug 1956.

 

Added to Historical Records - Conv... and categorized in — 6 years ago

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