RE: single battery possible?
Ok so on my DLE 20 engined TWM Spot On I'm running Hyperion LiFe packs of 1600mAhr for the servos and Rx and the 1700mAhr for the ignition through a diode,
I use 120 mA.hr of Rx+Servo current per 10min flight time and 100mA.hr of ignition A draw.
I'm pretty sure I can get away with 2x 1100mA.hr LiFe Packs. or one 2100mA.hr pack.