Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
APU Engine
APU engines usually consist of a centrifugal compressor and a radial turbine however, axial compressors and turbines may be added or used in their own right. Centrifugal compressors are used because of their high compression and small size and when combined with a radial type turbine make the APU very compact. These components are also very robust and require less maintenance than axial flow components. Use is also made of reverse flow combustion chambers that again makes the overall size smaller.
In most cases there is a design compromise made between the ideal APU for an aircraft i.e. its ability to provide air and electricity throughout the operational envelope of the aircraft, and it weight and size. It is usual therefore to find that air and electricity are limited to various altitudes dependant upon the parameter required.
APU systems are very basic and the APU will shut down if a problem is sensed. Most APU's will shut down for the following faults:
Fault
Comment
Low Oil Pressure
Engine Overspeed
110% Honeywell 108% Sundstrand
High EGT
849°C Honeywell
Loss of Speed Signal
Electronically monitored APU's need this signal to control the APU.
Los of EGT Signal
Low Speed
Some APU's shutdown if they drop below 90%.
(Some will try and relight at 95%)
Electronic Unit Failure
Loss of Control
The APU may also shut down on the ground (not in flight) for the following faults:
Fire
May cause a warning horn in the u/c bay to sound
Generator Drive Low Oil Pressure or High Oil Temperature
vx woks is areal time operating system or not
What is the difference between real money & nominal money? 1) Nominal cash is related to the measure of counting. Moderate figure is what is written on the bill. Whereas actual
Re-heat Ignition The atomised fuel spray is fed into the re-heat jet pipe and ignited by one of three methods:- • Spark Ignition • Hot Streak Ignition • Catalytic Ignition a
PITCH LOCK MECHANISM The pitch lock mechanism is necessary to cater for the two fine pitch position of 'flight fine pitch' and 'ground fine pitch'. It acts as a safety device
based on your managemet style or your personal perspective, discuss how you developed your viewpoint how it will influence the way you manage, and what challenges you migt face if
asymmetric effect (p-factor)
Describe the method of undertaking an anemometer traverse for a airflow
Which type of financing is appropriate to each firm caselet
process / description.. if I put A=1000 and B=0100 A>B gate will show output 1 and dose A
why is it recommended then other energy source
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd