Newbie help required!
Lets suppose I am on a shallow final glide, 60k out in my 40:1 ship, cruising at 60 knots. Recent thermals have been at least 5 knots and I am coming into some big lift. For the discussion rough air Vne is 100 knots.
What strength thermal should I take to increase finishing speed to Vne and how much (if any) time will this save me?
How do I estimate this at the time? What is the latest point on track to take such a thermal?

Thanks, Bagmaker