Small E-Help super batteries to search a big range for lift
https://youtu.be/umxtBpbo2B8
Electric flight some far distance from Moseidmoen to Drivenes
north in Vennesla to search for weak thermic lift on a over-developed, zero wind
and weak lift day. Battery is a 4 kg mass 0.5 kWh Lithium Polymer 65C high tech
stuff. Capable of keeping a hang glider airborne for 15-20 minutes.
https://OzReport.com/1600358318
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