Spiral Dives Explanation.

On Thu, 25 Aug 2005 02:39:58 UTC, "Sandy Stevenson"
wrote:

: I've gathered
: that
: it's related to lateral stability, and that the wings are not stalled, but I
: don't yet
: understand how it comes about that adding back pressure increases one's
: airspeed.

When a glider is turning it is simultaneously pitching and yawing. A
flat turn is entirely yaw and a 90 degree bank turn is entirely pitch.
The elevator controls the pitch, which is why you need more back
pressure in steeper turns. If the turn is less than 90 degrees bank.
pitching more also keeps the nose up, so the normal pull back - slow
down relationship holds.

If the turn is at more than 90 degrees, pitching more directs the
flight path down more, so you speed up as you pull back.

Ian