Ignition Override said......
"Good points, gang. When this styrofoam glider (at least 4' wing span) is thrown, even slightly nose down into a steady headwind, there must be some bit of assymetry-either a little Dutch Roll or maybe one wing has more scrapes and resulting drag-or both wings are not held at equal angles in the wing slots."
Aviate 1138 says......
Any unswept high aspect ratio wing suffers from large moments of adverse yaw. That is why we pilots who trained initially on gliders, have plenty of rudder practice in maintaining the ball somewhere near its centre line - the hand launched glider with no moving surfaces has no such luxury.
... "Take up slack......."
Aviate 1138