Hobo wrote:



It is commonly said that delta wing designs lose an above average amount
of speed while turning and that this a deficiency of the design. Is this
true, and if why does this occur? Also, how does this reputed flaw
affect the potential performance of the Typhoon?
It primarily applies to "pure" deltas, like the Mirage
III and F-102/106.
You don't see this to the same degree in deltas with
tails or moving canards, like the MiG-21, Typhoon, Rafale,
Gripen, etc.
With a pure delta, the elevons act a bit like spoilers
when they are driven up to bring the nose up, so you need a
higher angle of attack for a given lift, and more induced drag.
--
--Matthew Saroff
Rules to live by:
1) To thine own self be true
2) Don't let your mouth write no checks that your butt can't cash
3) Interference in the time stream is forbidden, do not meddle in causality
Check http://www.pobox.com/~msaroff, including The Bad Hair Web Page