Apu starting sequence in aircraft , Other Engineering

Apu starting sequence in aircraft :

In figure the APU control unit receives its power from the aircraft battery.

By moving the APU switch to ‘ON', power is provided to the intake door actuator and an LP fuel valve which starts to open. When they are both fully open, switches energise the starter system, igniters are energised and the APU accelerates with assistance from the starter motor to idle speed. The starter motor cuts out between 50 & 60%.

The fuel system controls the fuel flow during start. Once the engine is at idle (100%, lower if the APU is fitted with an idle power setting), the APU will be ready to load either electrically or pneumatically. This is indicated by a ‘Ready to Load' light or ‘APU Power Available ‘light coming 'ON'.

2290_apu starting sequence.png

Posted Date: 9/12/2012 7:36:01 AM | Location : United States







Related Discussions:- Apu starting sequence in aircraft , Assignment Help, Ask Question on Apu starting sequence in aircraft , Get Answer, Expert's Help, Apu starting sequence in aircraft Discussions

Write discussion on Apu starting sequence in aircraft
Your posts are moderated
Related Questions
i need 3 areasof application of lunear programming


Matrix laboratory solutions with matlab assignment help MATLAB (matrix laboratory) is an exact processing atmosphere and fourth-generation selection terminology. Designed by Nu


Question : (a) The Guide project has been developed to provide city visitors with a hand-held context-aware tourist guide. (i) In this case, what is the meaning of context-a

(a)  A section of road has a free flow speed of 55km/h and a jam density of 367 vehicles per kilometre. Assuming under a linear speed-density relationship, calculate the density at


If radial velocity is neglected, for a stat or there is no change from the cascade analysis. For a rotor this vectorial For a rotor this vectorial addition gives rise to graphical

Question: (a) What are the elements limiting high data rate in cellular networks? (b) Describe the following characteristics of 4G mobile networks: - Always on - RAN A

Lift and drag are merely the resolved components in specific directions of a resultant aerodynamic force caused by the relative velocity V of the vehicle through the air. If al