PP 09

How is a constant speed propeller set for take off position in relation to RPM and blade angle?. Low pitch, high RPM. Low pitch, low RPM.

What is the result of moving the throttle forward of a reciprocating engine operating at cruise power with the propeller in the constant speed range?. Opening the throttle will cause an increase in blade angle. Opening the throttle will decrease blade angle.

Most engine propeller combinations have one or more “critical ranges” within which continuous operation is not permitted. What is the purpose or what is being avoided when operating in these critical ranges?. Severe propeller vibration. Thermal runaway.

During an operational check of an aircraft using hydromatic full feathering propellers, the following observations are made. The feathering button after being pushed remains depressed until the feather cycle is complete, then opens. When unfeathering it is necessary to manually hold the button down until unfeathering is accomplished. Review these statements and determine if the feathering and unfeathering cycles are operating correctly and if not, what is the correct procedure?. Both the feather cycle and unfeathering cycle are functioning properly. Feather cycle correct, unfeathering cycle incorrect.

How does the feathering pump shut off in a hydromatic full feathering propeller?. The oil pressure cut out switch on the governor. Centrifugal stop pins.

What position should the blades of a hydromatic full feathering propeller be in before installing the dome?. Full feather. Flat pitch.

What are the advantages of a reversing propeller?. Reduced torque and fuel burn. Decreased landing roll, reduced brake wear, and increased ground maneuverability.

How can the pitch be changed in flight on variable pitch propellers?. Either by the action of the flight crew or by automatic response. Only manually by the pilot.

What is the requirement to repair a metal propeller blade struck by lightening?. An additional 0.020 of material must be removed below the damage. Replace the damaged blade.

What station is the propeller blade angle checked at on most propellers?. The 75% station. The 25% station.

What is required for constant speed propellers that have been kept in storage for over 10 years?. Complete O/H. Functional check only.

What is the most effective angle of attack of a propeller blade?. 2 to 4 degrees. 6 to 8 degrees.

What is the most common wood used in the manufacturing wood fixed pitch propellers?. Yellow birch. Maple.

How should propellers with wood blades be stored?. In a horizontal position. Suspended from hub.

What type of propeller shaft is normally used on modern horizontally opposed and turbo prop engines?. Flanged type shaft. Splined type shaft.

What is the minimum required contact area between the propeller hub and a tapered shaft?. 70%. 50%.

What is the purpose of the snap ring inside the propeller hub on a tapered installation?. To aid in removal of the propeller. To stop oil leakage.

What is the function and purpose of a master spline on a splined crankshaft?. For positioning the propeller correctly relative to the crankshaft throws. To increase torque transmission.

What material is the rear cone on a splined shaft made of?. Bronze. Aluminum.

What is the maximum out of track allowed for a 6-foot diameter wood propeller?. 1/16 of an inch. 1/8 of an inch.

What is the maximum out of track allowed for a 6-foot diameter metal propeller?. 1/8 of an inch. 1/32 of an inch.

What approved method is used to mark blade stations?. Grease pencil or crayon. Permanent marker.

Some types of propellers feather automatically during engine shutdown (normal operation), how are these propellers unfeathered?. By starting the engine. By applying manual feather lever.

What is the result of moving the throttle forward on a reciprocating engine when the propeller is in the constant range with the engine developing cruise power?. Opening the throttle will cause an increase in blade angle. Opening the throttle will cause a decrease in blade angle.

A piston engine aircraft with a constant speed propeller system is flying along in level flight with the RPM and manifold pressure set goes into a dive. What events take place in the governor and propeller to maintain a constant RPM?. The governor flyweights move outward (overspeed) raising the pilot valve, therefore allowing the propeller to move the blades to a higher blade angle (high pitch). Throttle closes and governor dumps oil.