More specs are here
http://www.me.vt.edu/unmanned/aircraft.html
but basically 94Kg max takeoff weight
Power plant is a twin cylinder Yamaha 2 stroke
ceiling is as high as we tell it to go (we are legally limited on height, basically we want to be able to see it for safety reasons)
The company only lists the speed as about 24km/hr likely limited by the autopilot used.
It is a Yamaha RMAX type G, initially meant for crop dusting, they outfitted them with gps and autopilots for research use.
Basics are here
http://www.barnardmicrosystems.com/L4E_rmax.htm#Item_2