Double acting feathering system, Other Engineering

Assignment Help:

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.


Related Discussions:- Double acting feathering system

Principal of assembly buildings- fire protection engineering, Principal of ...

Principal of Assembly buildings- fire protection engineering: As assembly buildings accommodate members of the public they often accommodate people with disabilities. People

Angle rate systems , Traditionally, seekers have been simple correlation tr...

Traditionally, seekers have been simple correlation trackers and a set of gimbals that are used to measure the angle rates of the target.          - Infrared seekers detect a

Principles of fire alarm systems, Principles of Fire Alarm Systems: Fi...

Principles of Fire Alarm Systems: Fire alarm systems usually perform two primary functions.   Firstly, they provide a means for warning people throughout the building that the

Extractive metallurgy, differences between blast , reverbatory and electric...

differences between blast , reverbatory and electric furnaces

Boroscope inspections of air craft engine, Boroscope inspections: Boros...

Boroscope inspections: Boroscope inspections involve looking at components within an engine using an optical probe. The probes are inserted in to the engine through ports in th

What is raroc?, What is RAROC?  RAROC is a risk-adjusted structure for e...

What is RAROC?  RAROC is a risk-adjusted structure for earnings statistic and earnings control. It is a device for calculating risk-adjusted financial efficiency. And it provide

Assignment, I paid for and attached module 16 for answers this morning but ...

I paid for and attached module 16 for answers this morning but received answers for module 15. How can I get the correct set of answers for module 16 please

Explain the instruction format of an assembler, Question 1 What is a compu...

Question 1 What is a computer? Explain the block diagram of a general purpose digital computer Question 2 Explain the instruction format of an assembler Question 3

Static aeroelasticity, An object, such as an aerofoil, moving through a flu...

An object, such as an aerofoil, moving through a fluid disturbs the surrounding flow field. The fluid velocity varies along the aerofoil surface creating a variation in pressure as

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd