Over-speed: Level to Descending (or unscrewing prop knob)

1. Accelerating rotation pulls fly weights outwards

Over-speed: Level to Descending (or unscrewing prop knob)

1. Accelerating rotation pulls fly weights outwards

2. Levers attached to fly weights reduce spring pressure

Over-speed: Level to Descending (or unscrewing prop knob)

1. Accelerating rotation pulls fly weights outwards

2. Levers attached to fly weights reduce spring pressure3. Valve opens allowing high-

pressure oil to prop hub.

Over-speed: Level to Descending (or unscrewing prop knob)

4. High pressure oil presses the piston that forces increased pitch which slows rotation.

1. Accelerating rotation pulls fly weights outwards

2. Levers attached to fly weights reduce spring pressure3. Valve opens allowing high-

pressure oil to prop hub.

Over-speed: Level to Descending (or unscrewing prop knob)

4. High pressure oil presses the piston that forces increased pitch which slows rotation.

1. Accelerating rotation pulls fly weights outwards

2. Levers attached to fly weights reduce spring pressure3. Valve opens allowing high-

pressure oil to prop hub.

5. Slowing rotation makes fly weights close the valve.

Under-speed: Level to Climbing (or screwing-in the prop knob)

1. Decelerating rotation moves fly weights inwards

Under-speed: Level to Climbing (or screwing-in the prop knob)

1. Decelerating rotation moves fly weights inwards

2. Levers attached to fly weights increase spring pressure on valve

Under-speed: Level to Climbing (or screwing-in the prop knob)

1. Decelerating rotation moves fly weights inwards

2. Levers attached to fly weights increase spring pressure on valve3. Valve opens allowing high-

pressure oil to be released from hub to sump.

Under-speed: Level to Climbing (or screwing-in the prop knob)

4. Less pressure on the piston allows prop to decrease pitch which speeds-up rotation.

1. Decelerating rotation moves fly weights inwards

2. Levers attached to fly weights increase spring pressure on valve3. Valve opens allowing high-

pressure oil to be released from hub to sump.

Under-speed: Level to Climbing (or screwing-in the prop knob)

4. Less pressure on the piston allows prop to decrease pitch which speeds-up rotation.

1. Decelerating rotation moves fly weights inwards

2. Levers attached to fly weights increase spring pressure on valve3. Valve opens allowing high-

pressure oil to be released from hub to sump.

5. Speeding-up rotation makes fly weights equalize and close the valve.