In a ______ duct air velocity decreases and air pressure ______.
Divergent, Increases
The air entering the first stage of compression on a supersonic airplane must be at a speed below ______.
Mach 1
In flight the foward motion of the air aircraft produces an increase in intake air pressure known as the ____ _____.
Ram Effect
the inlet for a turbofan is similar to that for a turbojet except that it discharges only a portion of its air into the engine the remainder passes through the ____.
Fan
SuperSonic inlet ducts must be designed to operate in three speed modes?
Subsonic
Transsonic
Supersonic
Supersonic aircraft will use a _____ _____ inlet duct.
Converging, Diverging
the inlet duct on a subsonic turbojet powered aircraft is a form of ____ duct
Diverging
When turbine engines are calibrated on a test stand, a ____ inlet is typically installed.
bellmouth
Helicopter operations may require the use of a ____ _____ on the inlet of the engine.