What do you mean by large ?
Something like this :
It's a 6m ( 236 in. ! ) span model of a Klemm 35, with a big torcman outrunner motor, and 2 30cell packs in parallel, batteries alone are about 6 kg ( 211 oz. )
This model was shown at this years Aspach E-flight meeting. Aspach is THE e-flight meeting in Germany.
For anybody who is interested, a bunch of pictures from that meeting can be seen here :[link=http://www.wherzog.de/aspach2003/]Aspach[/link]
Michael