This is a plane glider I made from reference pictures and it glides pretty well. It doesn't look good and don't get me started on the plane I took 3 minutes to make that tows it. I know the cockpit isn't the prettiest and the tow plane sucks but my excuse is that I didn't spend a lot of time making it and my limited experience in building planes.

Anyways, AG 1 detacthes the two planes. I inverted the tow plane's yaw so it would be possible to make both of them roll and turn. The idea is that when theplane is being towed, yaw in the direction you want to roll. It might take some practice but you should get the controls eventually. Enjoy!