bildan wrote:

I think the correct JAR 22 is standard recovery UNLESS the
manufacturer specifies an alternative method.

Wrong. A glider *must* meet the standard recovery requirement to be
certified. And it must recover with *all* allowed loading distributions
and also with asymmetrical water ballast, and from a fully developed
spin, defined as 5 turns (unless the spin converts to a spiral dive
earlier). (Yes, 5. The FAR only ask for 3 turns.)

Of course, manufactureres may define other recovery procedures which may
work faster, but nevertheless the standard procedure *must* work. (E.g.
the Cap 10 aerobatic airplane recovers much faster with the stick held
fully back.)

JAR 22 also asks that the spin must recover in less than something like
2 turns (I'm not entirely sure). Note that 2 turns will feel extremely
long!!! E.g. the ASK 21 (with tail ballast) usually recovers in less
than half a turn, but in certain circumstances (weight distribution,
moment of recovery in the pitch oscillation rythm) may last up to 2
turns. If you are not aware of this, then it will frighten you to death
and you will tell everybody that the ASK 21 is a potential killer, which
it's not.