For a home robotics project I want to fly a kite using a computer. For this to happen I need an electro motor up in the air (attached to the kite) which obviously needs a battery up there as well. From some smart people I understand that using a LiPo battery would be the best for this (because of the high energy to weight ratio). I also understand however, that a LiPo battery needs a special charger. My end goal is to charge this battery in the air by also hanging a small wind-generator under the kite so that the kite can fly indefinitely. If the battery cannot be charged while it is being used I can of course use two batteries, charging one while the other one is used.
So let's say I've got a 11.1V LiPo battery which uses about 500mA to 1A for the motor.
My question: is it possible to charge this battery from a wind generator, and if so, what hardware (preferably very low-budget) would I need for this to happen?
All tips are welcome!
[EDIT] Wow! I am overwelmed by the amount of in depth answers. I am a bit lost in them as well though, and I think I am after a bit more of a "beginners answer". As far as I understand, a wind generator supplies AC power in varying amount of Volts and Amps (right?), which needs to be converted to DC power with a constant amount of Amps (right?). So I guess that would mean I need the following order: Wind generator => Rectifier => Li-Polymer Battery Charge Management Controller (like e.g. this one) => LiPo battery pack.
Is this correct?