Book 2 - Subsonic Intakes

Question 1

for an aircraft that flies at subsonic, or very low ________ speeds, the short, circular, _____-type intake is preferred above all others

Answer 1

for an aircraft that flies at subsonic, or very low SUPERSONIC speeds, the short, circular, PITOT-type intake is preferred above all others

Question 2

a pitot-type intake is one that is slightly _________ from lip to engine

Answer 2

a pitot-type intake is one that is slightly DIVERGENT from lip to engine

Question 3

ideally, the pitot-type intake should be perfectly ______. this is to prevent setting up low-_______ areas within the intake which can induce ________ into the airflow and reduce _______ waste into the engine

Answer 3

ideally, the pitot-type intake should be perfectly ROUND. this is to prevent setting up low-PRESSURE areas within the intake which can induce VORTICES into the airflow and reduce ENERGY waste into the engine

Question 4

at subsonic speeds, the pitot-type intake is able to maximise the use of ___ pressure due to the forward speed of the aircraft. at these speeds, the intake is capable of retaining a good ram effect irrespective of aircraft ________

Answer 4

at subsonic speeds, the pitot-type intake is able to maximise the use of RAM pressure due to the forward speed of the aircraft. at these speeds, the intake is capable of retaining a good ram effect irrespective of aircraft ATTITUDE

Question 5

the intake of the engine must stall _____ the airframe to enable the engine to combat the effects of the stall

Answer 5

the intake of the engine must stall AFTER the airframe to enable the engine to combat the effects of the stall

Question 6

as the aeroplane reaches ____sonic velocities, a _____ wave begins to form at the forward ___ of the intake which will _______ air flow

Answer 6

as the aeroplane reaches TRANsonic velocities, a SHOCK wave begins to form at the forward LIP of the intake which will DISRUPT air flow