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09-20-2007, 06:38 AM #1
- Join Date
- Sep 2007
- Location
- Northern Italy
- Posts
- 160
Starter Cutout (correct N2 value) ...
Hello folks !
First, is it a correct statement that, on a B737-700, the starter cut-out should happen at 56 % N2 ?
Second, and if so, can anyone of you point me to the line of code where this is programmed within the PMSystems, in order to rectify it ?
Thanks and always three greens !
Eu
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09-20-2007, 09:35 AM #2
- Join Date
- Jan 2007
- Location
- Italy
- Posts
- 204
Yes, for the NG series it is 56% n2, classics series are 52%, don't know why in Pmsystems it is programmed wrongly also they use N1 value >10 for cut engine starters, normally i delete those lines 'cause i have SIOC that handle the code, but you can modify the value to >20 for example that contains,
For Engine 1:
else
manengstart1 = (fs1n1 > 10)
endif
And the for the engine2:
else
manengstart2 = (fs2n1 > 10)
endif
For your reference the section in .lgc file is below:
//EngStart-Begin
if ManEngStart1 = 0
if fsstartflag1 = 0
if bleed1ref > 0
fsStarter1 = 1
else
fsStarter1 = 0
endif
else
manengstart1 = (fs1n1 > 10)
endif
else
if elecbus1 and drive1cover
fsstarter1 = 2
else
fsstarter1 = 0
endif
endif
if ManEngStart2 = 0
if fsstartflag2 = 0
if bleed2ref > 0
fsStarter2 = 1
else
fsStarter2 = 0
endif
else
manengstart2 = (fs2n1 > 10)
endif
else
if elecbus2 and drive2cover
fsstarter2 = 2
else
fsstarter2 = 0
endif
endif
//EngStart-End
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