Just seen this on the web. with an efficient hexa or quad powered by for example, the new KDE motors, are current draws of 2C or less possible?.. considering you would only have to be carrying half the battery weight!.. If not I'm sure it will be possible soon! http://flitetest.com/articles/ncr18650b-the-future-of-rc-aircraft-batteries
Looks very interesting...wish someone would make break through on weight vs power for UAV work... Thank you,