PPRuNe Forums - flight idle N1

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AdamG

22nd March 2006 01:22

flight idle N1

Hi
Can anybody tell me what the flight idle N1 ranges are for B777 equipped with any of the 90,000 lbs engines (200ER with either GE, PW, or RR). How does that value change with altitude ? Also, what is the N1 figure for approach idle and when does the approach idle kick in ?
Thanks
Adam

Fish Out of Water

13th April 2006 13:11

Can't remember what the N1's are but the type of engine idle is dictated by the EEC. Approach idle kicks in when the flaps are away from up or when engine anti-ice is detected/on - i.e. to aid with the go-around case for spool up times!

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