At 06:46 19 February 2016, wrote:
Have you tried rebuilding the drum brake? My club used to have a
Twin
Astir=
retractable and the drum - tiny though it looked - always did a fair
job
o=
f stopping the ship. It was strong enough to make rubbing the
underside of
=
the nose on the runway a concern.

Very true, the original Grob 103 Twin Astir had no nosewheel so a
super efficient brake is not a good idea, unless of course you want to
grind off the gel coat, or even worse the underlying structure under
the nose. The Grob103 Acro did have a nosewheel and therefore the
more efficient disc brake was not a problem.
I always wonder if people actually think through the implications of
making something "better". Perhaps there was a reason why the
original design did not have a super efficient brake.
Duct tape can't fix stupid, it can muffle the noise.