On Feb 7, 9:15*am, Derek Copeland wrote:

If you really want a new one design 'World Class' glider I
can't see that adding an extra 0.75 metres to each wing
to bring the span up to 15m is going to add all that much
extra cost, but will give a big improvement in
performance...

Says the man with a 25-foot garage and 30-foot driveway...