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
You are interested in proposing a new venture to the management of your company. Pertinent financial information is given below. BALANCE SHEET Cash 2,000,000 Accounts Payable and

what is the equation relating the real exchange rate to the nominal exchange rate and domestic and foreign price levels

Flight dynmaics The study of aircraft- Stability & Trim (Equilibrium)- Motion due to • Control inputs • Atmospheric Disturbances • We will consider for the most part f

ELECTRICAL DE-ICING SYSTEM MAINTENANCE: Tests of the system must be carried out when the servicing schedule required it or when a component has been replaced.  Typical tests ar

when same music is played in veena and violin , we shall hear the sound of

Method of calculating the thrust forces: The thrust forces or gas loads can be calculated for the engine, or for any flow section of the engine, provided that the areas, pressu

The self lubricating bearing is a typical application of metal powder parts or powder metallurgy process. The self lubricating bearings made from brass, iron, aluminium bronze etc,

#questionA piece of Al weighing 6 kg and initially at a temperature of 300OC is suddenly immersed in a fluid at a temperature of 20OC. The convectice heat transfer coefficient is 5

Capacitive transducers Consider a capacitor consisting of two parallel conducting plates with an insulator in between. Its capictance is C = ε 0 ε r  A/d where ε