POF Q32 - Propeller Design and Effects Flashcards
The torque effect during the take off run in respect of a right hand propeller, when viewed from behind, will tend to:
a.pitch the aeroplane nose down
b.roll the aeroplane to the right
c.pitch the aeroplane nose up
d.yaw the aeroplane to the left
d.yaw the aeroplane to the left
On a clockwise rotating propeller, the P-factor will cause the aircraft to
a.Roll Right
b.Yaw Left
c.Yaw Right
d.Roll Left
b.Yaw Left
Propeller diameter must be restricted in size for what following reasons?
PICK ALL THAT APPLY
a.To increase propeller solidity
b.To increase power absorption
c.To reduce noise created by the propeller tips
d.To provide adequate ground clearance.
c.To reduce noise created by the propeller tips
d.To provide adequate ground clearance.
Propeller solidity is the ratio of
a.Number of blades : Propeller frontal area
b.Propeller disc area: Number of blades
c.Propeller Chord length: Propeller disk area
d.Propeller blade frontal area : Propeller disk area
d.Propeller blade frontal area : Propeller disk area
What is a negative effect of increasing blade chord?
a.decreases power absorption
b.decreases solidity
c.Increases tip vortices
d.decreases tip clearance
c.Increases tip vortices
Two propellers on the same shaft, rotating in different directions are known as what?
a.Contra Rotating Propellers
b.Clockwise Rotating Propellers
c.Counter Rotating Propellers
d.Continuous Rotating Propellers
a.Contra Rotating Propellers
A single engined aircraft with a clockwise rotating propeller, during the take off roll will have a tendency to
a.Yaw left due to P-Factor
b.Yaw left due to Torque reaction effect
c.Yaw right due to torque reaction effect
d.Yaw right due to P-Factor
b.Yaw left due to Torque reaction effect
An aircraft has a right hand rotating propeller. The pilot pitches up, Gyroscopic effects will cause the aircraft to
a.Roll Left
b.Pitch up
c.Yaw to the Left
d.Yaw to the Right
d.Yaw to the Right
The effect caused by a propeller that results in air hitting the fin at an angle and creates a yawing moment is known as what?
a.The asymmetric blade effect
b.The slipstream effect
c.The gyroscopic effect
d.The torque effect
b.The slipstream effect
During a Go Around manoeuvre, what propeller effects can be expected?
a.P-Factor and Gyroscopic effects
b.Slipstream effect only
c.All propeller effects are to be expected during a go-around.
d.Gyroscopic and Torque effects
c.All propeller effects are to be expected during a go-around.
