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how do i calculate V1, VR, and V2 sppeds? help appreciated!
That's a complicated issue that you need manufactures data tables to compute. It varies with wind, temperature, weight, flap setting, runway elevation and even barometric pressure. The real tables/reference cards are not available to the lay person and would be expensive if you did find them. You have to look for V speed information within the documentation of the aircraft model that you're flying.