"The BGA/instructors now teach that the hand must be on the release at least until the end of the ground run for all launches."
That may be appropriate for a winch launch but not for aerotow in the gliders I have the most time in. ASW-19b over 1500 hours and ASW-28 over 850 hours - I always started aerotow takeoff roll with airbrakes open and closed them when I have good roll control. Not possible to have the left hand on the release and the airbrake handle. Also not possible for flapped gliders which start with negative flap and then change flap setting when speed increases.
Andy
Last edited by EXDAC; 9th Oct 2017 at 20:12.