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Guest dogdog1985

Wrong V1 VR V2 from FMC

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I took off at RJAA, wind calm, ZFW is around 422000lbs with FOB 270000lbsThe FMC calculated values for T/O is (159, 168, 168)However, my aeroplane couldn't pitch up until 180 knots, almost running the whole 13000ft RWY.So is that the FDE problem or I hadn't trimmed my aeroplane correctly or my aeroplane was overweighted???

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Himaybe a wrong N1 setting, i've almost the same. I run the whole runway lenght because my take off power is not enough according my gross weight.rgs,airnav

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And i don't know why 103.7% of N1 is a max for this a/c !!!!obviously there is a problem with this fmc. ;airnav

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>And i don't know why 103.7% of N1 is a max for this a/c !!!!>obviously there is a problem with this fmc. >>;airnavWill it be the trimming problemI haven't trim my aeroplane

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You haven't said which aircraft this is but if it's the 777 103.7% seems about right for max N1%, if possibly a percentage point or two low. What figure were you expecting?I know they are not the same but based on my Airbus experience I would say that the cause of the problem is definitely related to trim being incorrect.Rob Elliott, EGPE InvernessPSS Airbus Support andAirbus Fleet Training Captain, British Airways Virtual airbus@speedbirdonline.co.ukhttp://www.speedbirdonline.co.uk/airbus.htmlhttp://www.bavirtual.co.uk

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Patrick,Let me know the aircraft version, OAT and CofG you are using. I have just done the TO twice using your weights and I hit VR after 38 secs at about 1/2 runway length and rotated without problem.John Rooum

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>Patrick,>>Let me know the aircraft version, OAT and CofG you are using. >I have just done the TO twice using your weights and I hit VR>after 38 secs at about 1/2 runway length and rotated without>problem.>>John RooumIt should be sp2, and I installed totally 2 patches. The COG is around 20%

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Patrick,I meant which 777 version {LR, LRF or ER}, what temperature you had set in the FMC and what was the CoG calculated by the load editor?It is essential to have these factors set correctly in orfer to get the right performance from the aircraft.John R

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