When London Sailplanes were still the Schleicher agents they imported at
least one K21 fitted with the tail weight kit, I flew it with the kit.
They also converted one of their machines, EDW, the one which was sold to
University College London and later went to Halton, where I believe it is
now.

You could ask the people at Halton how they find it, or go there to try it
yourself.

I believe that Caracole Soaring in California use K21s with the tail weight
kit for spin training.

Both Dunstable and the Midland Club, Long Mynd went to a K21 fleet for
training, but retain a K13 used for spin training.

W.J. (Bill) Dean (U.K.).
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"Chris Marren"
wrote in message ...

At my club we still retain a K-13 for spin training
as our K-21's are almost impossible to spin. We checked
with the BGA some time ago and they confirmed that
it is a requirement to undergo full spin training prior
to solo.

We also explored the possibility of using
the spin kit (tail weights) as supplied with one of
our K-21's. We got no-where with this in regards certification,
manuals etc.

However we're getting a DG-1000 and so
we will then sell the K-13. It will be sad to see it
go; we've crunched it around since 1968 and it's still
going strong. Many of our instructors still prefer
to instruct in it. Provided you do in house maintenance
on the cheap with club members then your costs are
lower. One thing we are finding is the size of your
average pilot has grown since 1968 and 40% don't fit
in it. We operate alongside Vikings (Grob Acro) and
they are a fine trainer although the undercarriage
is not as strong as either the K-13 or K-21.