PPRuNe Forums - View Single Post - Max motoring or min N3 / N2 for fuel on at start ?
Old 24th May 2008, 21:35
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Angels 60
 
Join Date: May 2008
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1- No

2- No -

For the latter question, some people in here have decided to introduce fuel when the starter rpm has maxed out...to improve cooling, ect..

Ofcourse the checklist says something different..they give a minimum N1/2/3 to add fuel... which I personaly beleive is fine, because the manufacturer thinks it's ok, ....and I believe they don't want people sitting there for 5 minutes 'pre cooling thier engines' with a starter motoring at max, before they add fuel

If people use Max rpm before they add fuel, then it goes that someone will read this, take the cooling argument to it's logical extent and sit there with a motoring starter for much longer then the manufacturer intended.

And when the starter goes, no more flying untill it get's fixed....

Max starter rpm or how fast it accelerates to N1 desired varies just by hooking up a GPU....
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