Module 17 – Propeller

COURSE DESCRIPTION

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.

PROPELLERS CONSTRUCTION

Construction methods and materials used in wooden, composite and metal propellers;
Blade station, blade face, blade shank, blade back and hub assembly;
Fixed pitch, controllable pitch, constant speeding propeller;
Propeller/spinner installation.

PROPELLER PITCH CONTROL

Speed control and pitch change methods, mechanical and electrical/electronic;
Feathering and reverse pitch;
Overspeed protection.

PROPELLER SYNCHRONISING

Synchronising and synchrophasing equipment.

PROPELLER ICE PROTECTION

Fluid and electrical de-icing equipment.

PROPELLER MAINTENANCE

Static and dynamic balancing;
Blade tracking;
Assessment of blade damage, erosion, corrosion, impact damage, delamination;
Propeller treatment/repair schemes;
Propeller engine running.

PROPELLER STORAGE AND PRESERVATION

Propeller preservation and depreservation.