Parker variable wing
The Parker variable wing is a wing configuration in biplane or triplane aircraft designed by H.F. Parker in 1920. His design allows a supplement in lift while landing or taking-off.
The Parker variable wing is a wing configuration in biplane or triplane aircraft designed by H.F. Parker in 1920. His design allows a supplement in lift while landing or taking-off.
The Parker variable wing is a wing configuration in biplane or triplane aircraft designed by H.F. Parker in 1920. His design allows a supplement in lift while landing or taking-off.
Source: Wikipedia "Parker variable wing" · CC BY-SA 4.0
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