Hello again, I was wondering why do pilots have to enter slope, rwy condition, wind, and temperature in the take-off ref pages if the FMC does not calculate any v speeds in real life??. They get performance data from charts and enter v speeds manually or through ACARS so I don't see why they have to fill this info except maybe for take off runway and derated Take-off temp. Thank You :-)

I would imagine that the PIC team added those elements to the perf page so that the sim would automatically calculate v speeds making peformance data charts unnecessary.Just a guess.DSCVA3339

I'm at loss here. As far as I know (and accoirding to the FMC guide from Bill Bulfer) V-speeds are calculated (but can be overruled).Kind regards,Stephan Haas

Thanks for the response but now I

There are different FMC versions. One kind calculates V speeds automatically, provided that flaps setting, temp, etc. are entered. The kind that doesn't calculate V speeds only needs (and allows) input of assumed temp.At least this is how I understand it, but there are probably variations to this ...Martin767 fetishistIt's a lot like life and that's what's appealing

Do you know which type an airline like American uses?

The type in PIC! :(Lee Hetherington (KBOS)

It must be a carrier option.All the 767's I've ever flown you've had to get all the numbers out of the book and enter them into the FMC yourself.In reality you only need to do this for speedtape equipped aircraft.I know on our 744 fleet they get all their speeds out of the FMC.

At FedEx, on the scare-buses, they manually enter the V speeds into the FMC. They get the info from an APLC (Airport Performance Laptop Computer). Its an like an laptop that has a huge database of airport/runway data. You plug in your weights, winds, flaps, and runway condition, and it gives you your v speeds and runway stop margins, etc... You can also put in MEL items, like reversers inop.Does any other airlines use this too? Each of our planes has one on board, from the 727's to Md-11's. Bryan Cruse