Planes, construction of; balancing.—The upper surface of an aeroplane wing is provided with vents 4, 9 parallel to and respectively near the leading edge and near the junction of the wing and its aileron, these vents communicating with a region of higher pressure at the wing tip. The air intakes may be controlled by valves or louvres which may be interconnected with the ailerons. The lateral edge of the wing is bevelled to present a slope towards the underside, or it may be given a forward rake to provide an air intake.
(1930), "Month in the Patent Office: A Selection of the More Important Aircraft and Engine Specifications Published Recently", Aircraft Engineering and Aerospace Technology, Vol. 2 No. 8, pp. 216-216. https://doi.org/10.1108/eb029307
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