I have a Slow Stick twin rotor gyro that I have flown about four times. It flies nicely when I get it off the ground successfully. Sometimes when doing a lift off it has banked hard to the right and crashed. Other times, when I was quick enough to correct with opposite rudder I was able to recover. My last attempt was pretty much the same only after correcting with left rudder it rolled over just the same. Is my problem that I am not getting the rotors up to full speed? If so, can anyone advise me on how to determine when I have reached sufficient speed. When flying fixed wing aircraft I have no problem in gaging take off speed. This is what I've been doing with the gyro and it has been a hit and miss situation.