On 3/16/19 9:31 PM, wrote:
On Saturday, March 16, 2019 at 8:34:16 PM UTC-4, Andrzej Kobus wrote:
On Saturday, March 16, 2019 at 7:35:22 PM UTC-4, kinsell wrote:
On 3/16/19 1:10 PM, Andrzej Kobus wrote:
On Saturday, March 16, 2019 at 1:04:19 PM UTC-4, kinsell wrote:
On 3/16/19 10:05 AM, Jonathan St. Cloud wrote:
Was wondering if others had read and were doing this:
https://www.dg-flugzeugbau.de/wp-con...2019-103-e.pdf

The ASG-29E has a gas tank directly above two batteries used to power flight instruments.


Interesting that they say to add epoxy to the casing. Putting a fuse at
one of the battery terminals would be a more conventional way of
handling it, and would allow for easier battery replacement.

You are missing the point. The fuse will not protect against internal short.


No, not missing the point. The way I read it, they're talking about an
battery holder added around the battery. You wouldn't normally call
internal wiring "battery cables". Maybe something got lost in translation.

If anybody is using a battery so poorly constructed that it shorts out
internally and catches fire, that battery should be discarded immediately.

They are not adding a housing they are internally fixing it with PU resin because they had internal short circuit.

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.


Well, the service bulletin talks about an LFP that burned. There was a
fire in an EB-28 in Finland last year with a 10 A-H LFP. Here's a video
of an LFP burning:

https://www.pilotsofamerica.com/comm...-fires.102016/

There have been claims that LFP's don't burn, but that's simply not true.