The AE-1 is a self-launching sailplane. The innovation is that the thrust
is given by electric motor! http://www.airenergy.de/silent/index.htm

I think that it is the first battery-powered glider with retractable
propeller but I am not sure. Have you already see this kind of propulsion ?

Do you think in 10 years (or more), the electric drive will be use on every
self-launching sailplane ?

Clément,