Fan jet engine bypass air delivery system for blown wing aircraft lift augmentation device

Claim 1

In a fixed wing aircraft, at least one fan jet engine having a housing and a fan bypass air passage within the housing in surrounding relationship to an engine compressor and turbine, a bypass air bleed-off conduit coupled in said housing and communicating with said passage and adapted to conduct fan bypass air to a wing lift augmentation system of the aircraft, and a fan bypass air shunting device on the engine housing and being movable to an active position within said passage near said bleed-off conduit and to an inactive position substantially outside of said passage, and an actuator means for said shunting device, said shunting device comprising a normally flat metallic strip coupled to said actuator means to be moved thereby, and coacting spaced relatively stationary guide devices for said strip within said passage and attached to said housing, said guide devices adapted to shape said strip into a helix of approximately one convolution within said passage and to impart to the strip an arcuate configuration at all points on the circumference of the strip, whereby the strip will act as an air scoop in said passage to shunt fan bypass air into said bleed-off conduit.