Garrett Engine Propeller System Flashcards
TPE-331 is what kind of turbine engine?
Fixed-shaft
what moves the blades to low pitch and reverse pitch?
Oil pressure
what moves the blades to high pitch and feather position?
a combination of spring pressure and centrifugal force
what is incorporated into the propeller hub to prevent the blades from rotating into the feather position during shutdown?
retractable start latches or pitch stops
What does Negative-Torque-Sense (NTS) System do?
automatically increases propeller pitch whenever
negative torque exists
On A Garrett engine the negative torque signal (NTS) provides a signal which does what to the propeller blade angle to limit negative torque or prevent the propeller from back driving the engine?
The NTS drives the propeller to coarse pitch to slow the propeller down and reduce the negative torque on the engine.
engine power output is controlled by the?
Fuel Control Unit
propeller blade angle is controlled by?
Prop Governor
power lever four positions
Reverse, Ground Idle, Flight Idle, Maximum
What is the function of the power lever during flight?
to directly adjust the fuel control unit.
What is the function of the power lever during Ground operations?
bypasses the propeller governor and directly controls propeller blade angle through the propeller pitch control unit.
The primary function of the condition lever
to control engine speed and to manually shut off the fuel and feather the prop
3 position of the condition lever
Cutoff, low RPM, and high RPM
How does the primary and underspeed governor connected to the conditon lever?
Through a mechanical linkage
When the pilot starts the engine under normal start conditions on an aircraft equipped with Garrett engines what must the pilot due to obtain full propeller pitch authority?
The pilot must select reverse pitch to allow the pitch stops to retract to gain full propeller pitch authority.
