RE: E-FLIGHT BLADE CP
The pitch curve in the stock radio is something of a mystery. I still havent figured out exactly how they have it set.
At mid stick in idle-up or normal mode there is about +2-4 degrees of pitch (so the heli will stay airborne). When you start going negative, it will go to 0 pitch just a tad below mid-stick and expo's so that at full bottom stick you have between -8 to 10 degrees or so, so you still have equal throws both ways, but the transition point is under mid-stick. The heli is more sensitive on negative collective than on positive due to this.
As far as chargers and batteries.
Im running 1 E-tec 3cell 1250mah lipo.
I charge it on a Great Planes Triton charger at 11.1V 1.2A
Normally one battery is enough. By that time I'm tired of flying and need a break.