Ian wrote:
There was a condition, wasn't there, that the plans had to be
available to multiple manufacturers? I suppose that would have put S-H
off a bit. But then, how many manufacturers ever made PW-5's?

Two, actually, PZL Swidnik and PZL Bielsko which, despite the similarity
in names, are competing companies. There is also a third set of molds
from which one glider was built, the builder was killed in an off-field
landing accident...

Marc