This is a complicated vehicle to fly. Large prop is set on VTOL. Spin the smaller engines up till your going at least 60 mph (100KPH) then fire up the main rotor. Do not use pitch as it will mess up altitude, the main rotor will adjust it safely for you. Change the speed of the main rotor to change pitch while in turns and ascending. It is for emergency's when you are plummeting and you need to get altitude ASAP. Once airborne at around 250 to 300 MPH (402 to 482KPH) you can then turn the throttle down to 30% to conserve fuel. Flying at 100% with little engines all the time will give you a short flight. Once your main rotors out of action you will fall like a stone. There is also a sweet spot for rotor speed to get a relatively level flight. It is also able to land if you are skilled enough at piloting.