On Saturday, March 16, 2019 at 8:31:57 PM UTC-7, wrote:


Many of us are flying with multi-cell LiFePO4 batteries that have internal wiring and are not filled with resin. Is that a problem? Or is the location of the batteries in this specific glider such that the resin is advisable? A battery fire anywhere in a glider (even without a fuel tank) is catastrophic. OTOH I havn't heard of any fires with this type of battery. It's the lithium-polymer battery pack (also much larger, with many more cells) in the FES systems that has had fires.

Probably not if a self launch is electric or has a Wankel engine that isn't doing its best to rattle your teeth fillings loose. With an engine that could pass for a paint mixer, the resin may keep things from rattling enough to chafe and perhaps short the battery internals.