U.S. Patent Specifications

Abstract

A flying machine having stationary wings and rotating wing systems, said stationary wings having openings corresponding to a part of said rotating wing systems, said rotating wing systems being adapted to be in part retracted into said openings and to, in part, laterally protrude from said stationary wings when retracted and to supplement by that part which laterally protrudes from said stationary wings, the lift produced by said stationary wings.

Citation

(1937), "U.S. Patent Specifications", Aircraft Engineering and Aerospace Technology, Vol. 9 No. 1, pp. 26-26. https://doi.org/10.1108/eb030145