I have seen this bird fly many times. Mike (Mithy) has awesome power on this thing. If you calculate based on his numbers here, he has:FUNTANA 140S, 78 inch wing. 11.5 pounds.
Hacker C50-14XL w/6.7:1 Gearbox. & APC 22 x 10 Prop
HAcker Acro 90 ESC
10S4P x 6000 LiPo Packs
68 amps at about 40 volts max power. (2.7 Kw)
10 minutes of my flying uses about 3800 to 4200 mah
Oh.. yeah.. the above power system provides for AWESOME vertical performance!
2700W / 184ozs = 14.7 W/oz<---- nice!