We have been working on this copter for about 3 weeks. First one was made out of plywood and broke while maidening. (Actually never get in the air.) So we decided to build one using U shaped aluminum profiles.
Setup as follows :
4 Turnigy SK35-36 910kV with 2 12x6 hobbyking APC's and 2 12x6 reverse real APC's
4 Turnigy 60A ESC ( don't need that much but they can be used for bigger motors :) )
1 5000mAh 3S1P 40C Zippy Battery (will test with 2 of them)
Arducopter NG Code with a few thing changed ( to allow changing pid's while in the air and view a few key data)
After 5 minutes of short take of and landings to configure PID's we can fly this thing hands off the stick. Actually it flew itself :)
Here is the first battery being drained to the limits. :) Nothing happened to the copter. (Raw footage not edited yet )