| 摘要 |
623,321. Aircraft control surfaces. SOC. NATIONALE DE CONSTRUCTIONS AERONAUTIQUES DU NORD. April 29, 1947, No. 11492. Convention date, July 24, 1946. [Class 4] A metal control surface for aircraft is formed by the combination of two panels and a solid leading edge section forming a balancing mass, the two panels having out-turned flanges directly connected by solid rivets and the solid leading edge section being secured by screws to a portion of one of the panels located in contact with the rear face of said section. The upper panel P<SP>1</SP> is formed from ribs 6 and stringers 5 connected by plating 1 formed at the leading edge into a spar having a web 2 and a lower flange 4. The lower panel P<SP>2</SP> is constructed in a similar manner except that at the leading edge the plating is extended forwardly and riveted to the spar flange 4. The trailing edge is formed by riveting the top and bottom panels together on an intervening wedge-shaped member 26. Balancing of the control surface is effected by a profiled nose section A which is secured to the spar web 2 by screws 23 engaging nuts 12 fixed to the rear face of said spar web. Adjustment of the balance is obtained by forming grooves in the rear face of the weight A.
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