Hi guys,
ref the Cybird and other Ornithopters, try the following http://www.ornithopter.org

Loads of info/video/forum on ornithopters.

I recently bought a Cybird, flys really well (light winds only), and is an amazing sight. BUT the gear box pinion sheared on only about forth flight. The bird came down like a sack of spuds!! [&o] No damage!!
However I was flying it with a 9.6 V pack when a 7.2 - 8.4 max is recommended (don't berate me too harshly for this, it didn't seem too overly stressed and it was the only pack I had).

Be flying again soon with recommended pack, keep you informed.

Also, I agree with Dennis, the only large terrosaur models I have seen were gliders.

Ted