Bypass air valve for turbofan engine

摘要

A bypass air valve is provided which includes a liner, a strap, apparatus for biasing the strap into contact with the liner, a selective actuator, and apparatus for passage of bypass air. To open and close the valve, the selective actuator unwraps a segment of the strap from the liner before the strap is translated a distance around the circumference of the liner. The biasing apparatus biases the strap back into contact with the liner.