Propeller Ice Control
Aircraft electrical power for propeller deicer systems is transferred from the stationary engine to the rotating propeller hub assembly by means of these two components.
What are slip rings and brushes?
Most reciprocating multiengine aircraft use this system to reduce vibration and eliminate unpleasant noise.
What is propeller synchronization?
High RPM and low-pitch angle describe the position of a constant-speed propeller during this phase of flight.
What is takeoff?
The propeller governor is also known as a ____ sensing device.
What is Speed?
During normal operation, moving the control lever for a constant-speed propeller forward will do this to the propeller RPM.
What is increase?
This force is used to eject anti-icing fluid from the slinger ring to the blades on a propeller.
What is Centrifugal force?
This type of imbalance will cause a two-blade propeller to have a persistent tendency to come to rest in a horizontal position (with the blades parallel to the ground) while being checked on a propeller balancing beam.
What is Vertical imbalance? (hub imbalance)
Constant-speed, non-feathering propellers without counterweights increase pitch angle using one of these:
What is oil pressure?
During the on-speed condition of a propeller, the centrifugal force of the governor flyweights is equal to this component' force.
What is the speeder spring force.
During an overspeed condition, the propeller governor flyweights will tilt this way.
What is outward?
Some propeller fluid anti-icing systems use this instead of TKS fluid.
What is Isopropyl alcohol?
Correct blade contouring and angle setting will help eliminate this type of propeller imbalance.
What is thrust or aerodynamic imbalance?
This component on a governor limits the maximum engine rpm on takeoff.
What is the adjustable pulley stop screw?
These spinning components actuate the pilot valve in the governor of a constant speed propeller.
What are the flyweights?
Some propellers are able to move their blades to a negative angle of attack. Another name for this is _____.
What is reverse?
Ice formation on a propeller blade can cause this undesirable condition.
What is unbalance and vibration.
To avoid severe vibration, many tachometers are marked showing where continuous operation is not permitted. These speeds are known as _____.
What are Critical ranges?
A powerplant using a hydraulically controlled constant-speed propeller is operating within the propeller's constant-speed range at a fixed throttle setting. If the tension of the propeller governor control spring (speeder spring) is reduced by movement of the flight deck propeller control, the propeller blade angle will do this.
What is increase?
During an under-speed condition, the governor will cause a change in blade angle in order to cause a change in RPM. State the change for each in the correct order.
What are "decrease" and "increase"?
During high-speed, high-altitude cruising flight, the blade pitch angle of a constant-speed propeller will be at its greatest or at its least?
What is greatest angle?
Added weight and limited quantity are disadvantages of this type of ice protection system?
What is a Fluid system?
A propeller synchrophasing system reduces noise and vibration by adjusting this instead of RPM.
What is the phase angle between the propellers?
With no pilot adjustment, a constant-speed governor’s flyweights will initially move to this position as an aircraft in flight begins to climb while the governor is in its constant speed range.
What is underspeed or tilt inward?
A powerplant using a hydraulically controlled constant-speed propeller is operating within the propeller's constant-speed range at a fixed throttle setting. If the throttle is moved toward open (increasing Manifold Pressure and Fuel flow), the propeller RPM will do this.
What is "remain constant"?
On a multi-engine aircraft, the propeller must be capable of moving to this position if there is an engine malfunction.
What is feather?