On Jan 25, 7:58*pm, Eric Greenwell wrote:
...I'd assume a modern 13 meter glider should be capable
of better performance than a Std Libelle.

I still think that the minimum span for a person-carrying sailplane of
40:1 L/D is 14.3m. I think you could match the Libelle's 38:1 with
about 13.6m.

Thanks, Bob K.