Originally Posted by
ezydriver
I recall doing an instructors course at Dundee many moons ago. I was north of Errol, full flap, idle power and side slipping and the little C152 remained in level flight, never having been in a glider before I'd seen nothing like it. We spun it to get down in the end.
I know a couple of glider pilots who were doing some sort of licence conversion 3-4 years ago. The instructor was puzzled when they encountered what you describe, he had no idea what was going on. They explained, the penny gradually dropped with him that he had met the reverse not long before. I was astonished that an instructor flying from somewhere that gets regular mountain wave didn't recognise it.
PS if you'd flown downwind into the sink that would have got you down as well!