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WorksheetsCPL Acft Tech - Propellers
Total questions: 10
Worksheet time: 6mins
A disadvantage of a fixed pitch propeller is...
it has only one speed at which it reaches maximum efficiency
it has only one altitude at which it reaches maximum efficiency
it has only one temperature at which it reaches maximum efficiency
it has only one air density at which it reaches maximum efficiency
You are flying an aircraft fitted with a Constant Speed Unit (CSU). The aircraft is in the cruise at 8,500 feet and a TAS of 150 knots. What will the CSU do if you were to lower the nose of the aircraft without touching any other controls?
increase the propeller blade angle
reduce the propeller blade angle
place the propeller into reverse thrust
It would not do anything
When you want to increase the speed of an aircraft fitted with a CSU, the correct method is to;
select a rich mixture, select a finer pitch, increase the throttle
select a rich mixture, select a coaser pitch, increase the throttle
increase the throttle, select a rich mixture, select a finer pitch
select a coarser pitch, increase the throttle, select a rich mixture
Consider an aircraft fitted with a Constant Speed Unit (CSU). At a given RPM setting, if the throttle is advanced (increased), what will happen?
propeller RPM will decrease
propeller RPM will increase
engine torque will increase
propeller torque will decrease
If power is applied whilst a propeller is being moved from fine pitch to the reverse thrust angle, what is likely to result?
Normal operation of the propeller in reverse thrust
A propeller overspeed
Engine torque will be negated by propeller torque
A critical engine
Select all of the following actions that are likely to assist if you suffer a Constant Speed Unit (CSU) failure while flying an aircraft in the cruise, causing the propeller to begin overspeeding.
Reduce the throttle
Lower the nose of the aircraft
Put the pitch control into full coarse
Enter a steep turn
When you want to decrease the speed of an aircraft fitted with a CSU, the correct method is to;
adjust the mixture, adjust the pitch, reduce the throttle
select a rich mixture, adjust the pitch, reduce the throttle
reduce the throttle, adjust the pitch, adjust the mixture
adjust the pitch, reduce the throttle, select a rich mixture
When flying an aircraft fitted with a constant speed unit, what controls the manifold pressure?
throttle
mixture
pitch lever
carburetor heat
Select all of the correct options...
A typical Constant Speed Unit (CSU) governor incorporates...
flyweights
oil
a speeder spring
barometric sensing
If a Constant Speed Unit (CSU) fails it can immediately cause...
the engine to seize
the engine to stop, due to the increased propeller torque
the propeller to become detached from the aircraft
the propeller blade angle travelling to full coarse
