I think the ugliest glider was the one flown by Icarus - you know the one
with feather wings held together by wax. Icarus ignored the placard about
flying the mountain wave and it came apart in flight. The Crete FAA issued
an AD note that no further gliders were to be constructed with wax.

Other than that, I do not think I have ever seen an ugly glider. They are
all so graceful in the air - doing what they are designed to do.

Colin