Take off

[born_2_fly]

I was just wondering, how do pilots calculate take off speed? Just wondering if anyone knew. I know the pricible of it, so no one come and say "They do something with the weight and somthing else" cause i know that. it would be kewl if someone could give the real calculation! Thanks in advance

Born_2_fly

[beefhole]

Base VR is given by the manufacturer.  Speed is added or subtratced depending on weight, temp and winds.  All this info can be found in the aircraft's POH (there's a big graph/table normally)

[Saratoga]

Yup there is a big graph in the POH we use to get the "correct" V speeds for a given weight, temperature, flap setting, density altitude. Used to pilots figured it out manually, writing it down and doing the math, but it was all too easy to accidentally make a very small error, rotate five knots early, and stall happily into terra firma.