Maybe true if "near vertical", however, staying at a near vertical dive is
something that requires a conscient effort.
The glider won't just stay there on its own.
To remain in a 90 degree vertical dive requires a significant amount of
forward stick force and concentration.
As speed increases, the nose will come up (away from vertical) even if you
don't want it to, and even with full forward trim, it would still require an
honest push on the stick to maintain that attitude.

If you're recovering from an unusual attitude that puts you in a near
vertical dive, just don't sweat it.
Open the airbrakes and slowly pull out of the dive. There is no need to
overstress.

If you want to feel safer, go for aerobatic training.
You will see that you can actually dive 90 degrees down and recover without
exceeding VNE, without using the airbrakes and not getting even close to G
limits.
Even if you lag behind the glider and airspeed gets close to VNE, just open
the airbrakes and do a gentle pull out.




"Todd Pattist" wrote in message
...
"Arnold Pieper" wrote:

In most modern design gliders, the airbrakes can be deployed up to VNE,
and
they will prevent the glider from reaching VNE when fully opened.

The airbrakes are designed for this purpose.

Not in any modern glider I know of. Anywhere close to
vertical will exceed Vne with the brakes open.
Todd Pattist - "WH" Ventus C
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