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Training manual - Module 17. Propeller

Content

1. Fundamentals

Blade element theory;

High/low blade angle, reverse angle, angle of attack, rotational speed;Propeller slip;

Aerodynamic, centrifugal, and thrust forces;

Torque;

Relative airflow on blade angle of attack;

Vibration and resonance.

2. Propeller Construction

Construction methods and materials used in wooden, composite andmetal propellers;

Blade station, blade face, blade shank, blade back and hub assembly;

Fixed pitch, controllable pitch, constant speeding propeller;

Propeller/spinner installation.

3. Propeller Pitch Control

Speed control and pitch change methods, mechanical andelectrical/electronic;

Feathering and reverse pitch;

Overspeed protection.

4. Propeller Synchronising

Synchronising and synchrophasing equipment.

5. Propeller Ice Protection

Fluid and electrical de-icing equipment.

6. Propeller Maintenance

Static and dynamic balancing;

Blade tracking;

Assessment of blade damage, erosion, corrosion, impact damage, delamination;

Propeller treatment/repair schemes;

Propeller engine running.

7. Propeller Storage and Preservation

Propeller preservation and depreservation.