Double acting feathering system, Other Engineering

Double acting feathering system:

To prevent excessive drag in the event of a propeller on engine failure, the double acting propeller as with the single acting propeller requires a feathering system.

DESCRIPTION

The system has mechanical and electro hydraulic means of lifting the PCU control valve. An electrically driven pump supplies the feathering oil pressure. Oil is supplied from a 'Feathering' Reserve in the main engine oil tank.

1120_double acting feathering system.png

OPERATION

The control valve is lifted by moving the HP fuel cock lever to 'Feather' or by the piston lift solenoid valve opening and hydraulic pressure acts on the valve lift piston.
Oil pressure from the feathering pump is directed to the coarse pitch line to feather the blades. When the feathering is complete a pressure operated switch de-energises the pump-solenoid to stop the pump.
To unfeather the HP lever is opened and the feathering pump switched on for a few seconds.

MANUAL FEATHERING

HP fuel cock lever moved to 'feather'. Feathering pump started by Manual Feather Switch. Some systems have the feathering pump switch incorporated in the Engine Fire Handle.

1574_double acting feathering system1.png

AUTOMATIC FEATHERING

This uses the torque indicating system to sense engine failure.

When torque drops to a certain valve a low torque pressure switch completes a circuit to operate the piston lift solenoid and start the feathering pump.

Posted Date: 9/14/2012 4:17:25 AM | Location : United States







Related Discussions:- Double acting feathering system, Assignment Help, Ask Question on Double acting feathering system, Get Answer, Expert's Help, Double acting feathering system Discussions

Write discussion on Double acting feathering system
Your posts are moderated
Related Questions

Interest Rate Calculations In considering the time value of money, it is convenient to represent mathematically the relationship between the current or present value of a sing


Logic gates - and gate: Figure shows the symbol that represents 2 input AND gate together with its truth table. This gate will only adopt a 1 state at its output terminal when

Cash Flow Diagrams We will use a cash flow approach to analyze the flow of money through out a planning horizon. A cash flow occurs when money actually change hands. We will u


Combustion process: Air from the engine compressor enters the combustion chamber at a velocity up to 500 feet per second, but because at this velocity the air speed is far too

explain application of zener diode for meter protection

Genetic Algorithm Procedure Generate a "pool" of "genes" randomly These genes are then "mated" to produce the "mated" to produce the next generation Best genes have a

Providing fire resistant: If the building does not provide everyone with alternative exit routes then it may be acceptable for people to pass the fire if they are separated f