Read the information here: http://www.wattflyer.com/forums/showthread.php?t=18
and here: http://www.wattflyer.com/forums/showthread.php?t=1777

To take off, bring the plane to full throttle and as it accelerates, it should leave the ground on its own. If not, pull back on the stick VERY SLIGHTLY. Once theplane lifts off, level it so that it flies almost parallel to the ground for another 20-30 ft., giving it a chance to pick up speed. Then pull back SLIGHTLY to let it climb very gently. Don't make any turns until it is at least 50ft in the air. Make turns in small increments, always returning it to straight flight. The stick should not be moved more than 1/4 of its throw. Any more than that and you are overcorrecting. Remember, gentle movements. If you get into trouble, turn off the throttle and let go of the stick. Unless you are too close to the ground, the plane will automatically straighten out and go into a gentle glide. Altitude is your friend. Most new flyers fear getting too high, thinking that a crash from low altitude will do less damage than a crash from high altitude, or that their plane will get carried away by wind if they fly too high. basically, you should be flying about 150-200ft. above ground, or at least twice the height of the tallest nearby obstacle, like trees.