1. HIGH PRESSURE LOW PRESSURE Lift Production Level Three 416.01OHP # 1

2. Level Three 416.01OHP # 2 The Propeller BLADEHUBROOT TIP

3. Level Three 416.01OHP # 3 Propeller Pitch LONGITUDINAL AXIS PLANE OF ROTATION BLADE ANGLE

4. PITCH The pitch is the forward distance traveled by the propeller in one revolution. It is defined by the blade angle. When the propeller blade is set at a large angle it is called course pitch. When the propeller blade is set at a small angle it is called fine pitch. Level Three 416.01OHP # 4

5. TYPES OF PROPELLERS Fixed-pitch Adjustable-pitch Controllable-Pitch Propeller Constant Speed Propeller Level Three 416.01OHP # 5