POPULAR SCIENCE May 1947: p. 115 INVENTIONS WING CHANGES ITS CAMBER An airplane wing that can be adjusted in airfoil thickness to meet changing lift requirements has been invented by Jacque Fresco, of Hollywood. Calif. A hublike hydraulic jack unit, joining a number of flexible spars from points along the wing's edges, increases or decreases the space between the wing's surfaces, thus giving the pilot constant control over the wing's performance. |