Hi Jagipson, Vfto is you best rate of climb speed in a gear up, flaps up scenario. Typically, this is the speed a pilot would climb out at in the event of an engine failure during the takeoff/climb phase until all known obstacles are cleared. Vfto is also used to determine at what speed it is safe to retract the flaps. In the case of the CRJ, use Vfto - 30 knots to retract from 20 deg to 8 deg, and Vfto - 10 for retracting flaps from 8 to 0 degrees. Most takeoffs in the CRJ should be accomplished at 8 degrees. Use 20 degrees for shorter runways and high altitude departures. Unless you are single-engine, once flaps are retracted you can accelerate out to 250 knots and climb at that speed. Hope this answers your question. Nano