HOW THE FOOL-PROOF PLANE WORKS … The Appariitus is air-driven ; in other words, a small rropellcr-driven uir-pump compresses liic iiir In ilie reservoir. This iscarried by pipes attached to the struts throujiSh a check valve. Ihis valve is controlled hy a vane which is actuated by the wind-pressure and so works the valve that…
Aeronautics
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