Easier: Always take off with brake half open. This give you better
aileron control on takeoff. On a schleicher glider, you want the brake
open as the towplane takes out slack to have the wheel brake on so you
don't over run. Cycle the brakes a few times to show the tow pilot you
now what you're doing. Just leave your left and hand on the airbrake,
and close when you have aileron control (then move to flap handel).
It's really hard to forget a handle that is in your left hand!

John Cochrane