HIGH PRESSURE LOW PRESSURE Lift Production Level Three OHP # 1

Level Three OHP # 2 The Propeller BLADEHUBROOT TIP

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

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 OHP # 4

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