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