Engine Flashcards
What is the engine type
Roll’s Royce Trent 772b
How many spool does the engine has
3 spool, N1, N2 and N3
N1 is the low pressur spool
The fan and a 4 stage turbine
N2 is the intermediate spool
8 stage compressor and 1 turbine
N3 is the high spool
6 stage compressor and 1 turbine#
N1 and N2 are considered
Free spool
N3 is considered
A driven spool
How many fuel nozzles are there in the annular combustion chamber
24
The FADEC has how many channels
2 independent
A/THR is only available in what mode
EPR mode
What is the TR type
4 blocker door type TR
TR 1 and TR 2 are hydraulically controlled by
The blue system and yellow system
How many igniters per engine
2 identical
For automatic start, 1 ignition comes on and off when
N3 reaches 25-30% and cuts off at 50%
Both igniter will come on if
The residual EGT temperature is above 100 degrees or in case oa an auto restart after and auto start abort
In flight, you can select continuous ignition by
Putting the engine switch to IGN/START
The TR will remain idle until
The TR door are open at more than 70%
Full TR power is available when
The TR door are open at more than 90%
The OPU shutoff the HP fuel valve if
N1 reach 110% or N2 reach 117%
What are the 3 idle modes operated by the FADEC
Modulated idle, approach idle and reverse idle
The blue circle is
The TLA
EGT is amber if
Above 700 during ground start, or above 900
EGT is red if
Above 900 for +20 sec or above 920
The max permissible N1 value is
99%