Hello...I am flying a striker 27,(hand launch) it has elevons only. When launching it made a left dive to the ground.So what I do now is launch into the wind,upward and just a little to the right of level.I also trim the radio so it will climb and re-adjust in flight. I also start the motor before I launch. This may not be the way it is suppose to be done, but I works for me. Glad it is made of foam,tape and glue work wonders.
jugmaker