Many gliders will do 1:2 or even 1:1 at max airbrake speed (and some few 1:0). However it will then take 500 meters to slow down, so you're better off using a slip at reasonable speed unless the steep dive with brakes will bring you down to a normal approach angle well before the threshold.


1:0) ---- Emoticon of the student in the front seat the first time you demonstrate a slip at max airbrake speed to landing.

Learn to enjoy slips...it will save your bacon one day.