In article ,
Mark Parker wrote:

Plus in a glider if the wave/ridge is strong
enough you can get to VNE can't you?

Yery easily. Most gliders have descent rates less than 1000 feet per
minute at Vne, and the better ones are more like 500 fpm. That's 5 - 10
knots down, which means that a 10 - 20 knot wind hitting a reasonably
steep hill (30 degrees, sin = 0.5) is enough to keep a glider at Vne in
level flight. And if the hill is 45 or 60 degrees...

-- Bruce