In article ,
Geir Raudsandmoen
om wrote:

If you were within the permitted CoG range, and used
the standard recovery method, the spin behaviour you
described is definitely non-compliant with JAR 22 certification
rules. JAR22.221 states that a sailplane certificated
for intentional spinning must be able to recover from
a fully developed spin (5 turns) within 1 turn after
recovery action is done. This has to be demonstrated
in several loading and control conditions.

Fine.


Additionally, this paragraph states that it must be
impossible to obtain uncontrollable spins with any
use of the controls.

But how on earth can that be demonstrated? No matter *what* you do, you
can't get into an uncontrollable spin? But there are an infinite number
of possible things you *might* do with the controls. They can't ALL be
tested.

-- Bruce