5Z wrote:
What I'm trying to say is that a one spoiler landing is, to me, a total
non event. But to some is has turned into a fatality. Why is that?

Well, there is one obvious possibility, not all gliders will necessarily
behave the same way with asymmetric spoiler deployment. For example,
the spoilers on my LAK-17 are relatively small and close to the fuselage
(to the point where full spoiler deployment causes noticeable buffeting
on the tail), whereas the spoilers on my DGs were larger and farther
outboard. My guess is that roll forces from a single deployed spoiler
would be larger on a DG...