I recently bought the Florian Schambeck EMAscale 1400 (http://www.klapptriebwerk.de/produkt...ebe/ema-scale/) for my 1:3 scale Ventus C.
To match the 1400, I purchased the YGE 90 HV speed controller (http://www.yge.de/artikel.php?search=yge90hv).
The glider is 6 meters and will likely be in the 20-30 lb range. The usage will be doing several 500 meter climbs with rest periods in between.
Can someone please recommend a known-working battery configuration and where I can purchase them? Len recommended the XPS batteries a while back but they are out of stock.