Aircraft Propeller Systems Overview

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Questions and Answers

What direction do the blades move when oil pressure in the propeller hub increases on a multi-engine aircraft with a full-feathering propeller?

Toward low-pitch, high rpm (correct)

Toward high-pitch, low rpm

Toward high-pitch, high rpm

Toward low-pitch, low rpm

What is the recommended bank angle when performing turns with one engine inoperative?

25 degrees

5 degrees

15 degrees (correct)

10 degrees

What causes asymmetry in thrust during a high angle of attack situation on a multi-engine aircraft?

The ascending blade generating more effective thrust

A higher thrust generated than the ascending blade (correct)

The prop having 2 blades

The descending blade being longer

Which factors result in a lower Vmc?

An increase in weight and a forward CG Signup and view all the answers

Which statement about the left turning tendency in conventional airplanes is true?

It is caused by propeller asymmetry Signup and view all the answers

What is likely observed during a sudden power reduction while on approach?

Reduced induced airflow Signup and view all the answers

What is Vxse defined as?

Best angle of climb OEI Signup and view all the answers

What should a pilot monitor during the takeoff run in addition to RPM and oil temperature?

Fuel flow and airspeed Signup and view all the answers

What is the correct procedure for performing tight turns on the ground in a multi-engine airplane?

Power differential Signup and view all the answers

What is the speed for the best rate of climb in a multi-engine airplane called?

Vy Signup and view all the answers

Is it true that the left engine is always the critical engine in all twin-engine aircraft?

False Signup and view all the answers

Which factor causes more drag during an engine failure?

Windmilling propeller Signup and view all the answers

What defines the takeoff decision speed (V1)?

The highest speed at which the pilot must initiate action to stop the airplane in the event of an aborted takeoff Signup and view all the answers

Is it true that the landing gear warning horn will not sound if the gear is up and only one throttle is reduced to idle?

False Signup and view all the answers

During an engine failure, what is the minimum rate of climb that determines the single-engine service ceiling for a twin-engine airplane?

50 ft/min Signup and view all the answers

Is it advisable to feather the propeller if an engine is determined inoperative after a failure?

True Signup and view all the answers

Study Notes

Propeller Blade Movement

Increasing oil pressure in a conventional constant-speed, variable-pitch, full-feathering propeller moves the blades toward low-pitch, high rpm.

Recommended Bank Angle

The recommended bank angle for turns with one engine inoperative is 15 degrees.

Propeller Assymetry

In high angles of attack (AoA) situations, the descending propeller blade generates higher thrust than the ascending blade due in part to the propeller having three blades.

Factors Affecting Vmc

An increase in weight and a forward center of gravity (CG) lowers Vmc.

Propeller Turning Tendency

Propeller asymmetrical load contributes to a left turning tendency in conventional airplanes.

High RoD During Power Reduction

A high rate of descent (RoD) during a sudden power reduction in an approach is due to reduced induced airflow.

Fuel Pump Types

There are engine-driven fuel pumps and electrical boost pumps.

Recommended Takeoff Speed

Recommended takeoff speed is Vmc + 5 knots.

Instrument Approach on One Engine

Execute instrument approaches on one engine by planning the final approach at Vyse or Vmc (whichever is lower.)

Critical Engine

The right engine is not the critical engine in all multi-engine airplanes where both propellers turn clockwise.

Definition of Vxse

Vxse is defined as the best angle of climb with one engine inoperative.

T/O Run Checks

During takeoff run, pilots should monitor RPM, map, oil temperature and pressure.

Stabilized Approach

Executing a stabilized approach prevents a risky engine-out go-around.

Power Differential

Power differential is a factor for considerations during departures.

Engine Failure Consideration

Engine failure must be considered during all departures in multi-engine aircraft.

Best Rate of Climb Speed

The speed for best rate of climb in a multi-engine airplane is Vy.

Density Altitude and ASD

The longer the ASD, the lower the density altitude.

Critical Engine in Twin Engine Aircraft

The left engine isn't the critical engine in all twin-engine aircraft.

Propeller Tendency

Propeller asymmetrical loading tends to cause a left turning tendency in conventional airplanes.

Landing Gear Warning Horn

The landing gear warning horn will not sound if the gear is up and only one throttle is reduced to idle.

Single-Engine Service Ceiling

The single-engine service ceiling for a twin-engine airplane is determined by a 50 ft/min rate of climb.

Propeller Feathering

If an inoperative engine cannot be restarted, feather the propeller to reduce drag.

Decision Speed

The decision speed (V1) is the highest speed at which a pilot can initiate action to stop the aircraft in the case of an aborted takeoff.

Propeller Synchronizer

A propeller synchronizer may be used to balance the rpm between engines during takeoff.

Flaps During Approach

Flaps should be operated as little as possible during an OEI aircraft approach until the landing is ensured.

Engine Failure Drag

Full flaps cause more drag during engine failure.

Takeoff Altitude and Engine Failure

If a takeoff is initiated at an altitude greater than the OEI service ceiling, engine failure will result in a level flight.

Altitude at Equal Vx and Vy

The altitude at which Vx and Vy are the same is known as the absolute ceiling.

Gear Indication System

A red light on the landing gear indication system implies that the wheels are in an ascending, descending, or unlocked position.

Turbocharging and Service Ceiling

Turbocharging increases the service airplane's ceiling, it does this by providing more airflow which enable a better air-fuel ratio and provides a sea level or greater map at high altitudes.

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Description

Explore the fundamentals of aircraft propeller systems through this quiz. Learn about propeller blade movement, bank angles during turns, and asymmetrical loading effects. Test your knowledge on factors affecting Vmc and different fuel pump types used in aviation.