I built a Pieienpol Aircamper , extended the 80" wing to 86" plus drooping wingtips, 5" wheels. Axi 4120/18 Motor direct drive 15/8 Pro. 16 cell 3000mAh Sub C cells, covered with Solartex. The Pane has Copilot, and carries 2 video cameras,(one for check on the insstruments like compass , Altimeter and Wattmeter, the other looks outside)
The Video equipment has 800mW transmitter Audio/video and supplied be 10 Nimhi 2100mAh batteries. Total wight 13.68 lbs. Flight time about 9 minutes.
The Pane flies very stable, not arobatic. beautiful video pictures, no vibration. It climbs very good Over 1050 Feet AGL. It is so stable that we had it land itself, with only a little rudder input.
We tried smaller props, and they don't work nearly as good. 15/8 seems to be just right. I can monitor the Amps and Watts during flight, and it uses abaut 550 plus Watts on takeoff. Level flight is susstained with 300Watts. Sometimes we use 757 Watts on takeoff. but now we fly more conservative.