FS2004/FSX – Boeing 777 V-Speed Calculator v1.0. This Ruperts Software program is designed to calculate the V-speeds (V1, VR, V2) of the B777-200/300 for people who don’t have an FMC that calculates takeoff speeds. The program is a standalone program so you will either have to run it on a separate PC, minimize FSX or plan it before you start your flight. The only information you need to know is your takeoff weight (payload), and your desired Flap setting. By Rupert Smith.