Module 17 – Propeller
17.1 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.
17.2 Propeller 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.
17.3 Propeller Pitch Control
Speed control and pitch change methods, mechanical and electrical/electronic;
Feathering and reverse pitch;
Overspeed protection.
17.4 Propeller Synchronising
Synchronising and synchrophasing equipment.
17.5 Propeller Ice Protection
Fluid and electrical de-icing equipment.
17.6 Propeller Maintenance
Static and dynamic balancing;
Blade tracking;
Assessment of blade damage, erosion, corrosion, impact damage, delamination;
Propeller treatment/repair schemes;
Propeller engine running.
17.7 Propeller Storage and Preservation
Propeller preservation and depreservation.
EASA part 66 module 17 is about studying the construction operation and maintenance of propellers. The syllabus to set to prepare the student for a real maintenance environment as a mechanic. Question can be on practicals aspects as well as theoretical of propellers.. no Essay Questions.
Module 17 questions can be straight forward or lil tricky. .most of the propeller operation and maintenance syllabus is set to level 3,so its very important to have level 3 knowledge. Thismodule is not applicable for B2.
But its important to remember the right mathematical methods of vernier instruments and torque calculation. These questions are considered easy and at least two questions will be present from that. Questionnaire most probably contains multi choice questions (MCQ).
- Cat A- 20 multi-choice and 0 essay questions. Time allowed 25 minutes.
- Cat B1-30 multi-choice and 0 essay questions. Time allowed 40 minutes.
- Cat B2-None.
EASA Part 66 Module 17 questions.