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Picture No 12024627
Date 1929
Description Latest word in aviation 1929
Details

Diagram showing the experimental helicopter design by Saunders Helicogyre. Instead of fixed wings, the Autiogiro depending very largely on four slowly rotating wings which rotated with forward motion of the aeroplane.
Source Drawn by Douglas MacPherson in 'The Sphere', 4 May 1929, page 229
Credit © Illustrated London News Ltd/Mary Evans
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