Hey Guys,
A friend and I are embarking on a project to build a UAV. One of our many criteria is the flight lifetime, which needs to be around the hour mark. We have looked at LiPo batteries, and are confused about discharge rates and capacity. Somebody suggested that the discharge rate is relating to capacity, so a 45C 5000mAh battey can supply 225A for an hour. This is totally different to every other bettery I've seen, so I thought I would ask some experts to clarify.
The need for so much power comes from the fact we are using large EDF motors to get off the ground. We are planning on using four EDF motors with 5kgf thrust each. These will be powered by two of the 45C 5000mAh 6S batteries wired in parallel.
If you want more information about the craft, we have a 10 - 15kg payload, and a 2.9m wingspan. The reason to using the EDF motors over regular props is they have more thrust for less cost. A bonus is they wont break on a crash landing (yet to be confirmed!).
Thanks,
MM
http://phantomtwo.blogspot.com/