Udo Rumpf wrote:
The sink rate for the fully loaded glider(190 litres) = 1.2m/s
for the none ballaste version 1.65m/s

And the vertical kinetic energy converted to altitude (the only place
where we can take the energy in a glider) would be
h=v^2/(2g)
so for 1.2 and 1.65 m/s the altitude losses would be
0.073 and 0.139 m respectively. Not a signifigant factor I would say.

Plus, we would have to take into account the fact that in the end as
well (after levelling out) their sink rates will be different. But still
no signifigant effect...

Jere

jere at iki.fi