Originally Posted by RC-JG
How long do you leave the camber on for up the line ?
You need some camber basically all the way until start of dip. If you remove camber you are in danger of losing tension.
Many good pilots use just one launch phase. As I wrote, I have goine to 2 launch phases. First phase is about 10mm camber (at wing root), second about 6mm. If moment is good and tesiong is building quickly up, I change to smaller camber practically straight from launch, hepls plane speeding up. In very strong wind I use only smaller camber. Also if I have very good helper throwing the plane, I know I do not need the big camber. On the other hand, in downwind or sinking air lauch I use the big camber all the up.
The idea is to maximise tension. Tension = speed = tension = speed = tension... In launch plane is flying at high lift coefficient. If you suddenly remove all launch camber, you break up the acceleration process. Only very very short launches (sub 1 second) can be made without camber.