FYI related to EU/EASA FES Battery Fire AD

[Bob Whelan[_3_]]

https://www.gov.uk/aaib-reports/aaib-special-bulletin-s3-2017-on-hph-glasflugel-304-es-g-gsgs

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Presumably the requirement for a fire warning will be followed by additional requirements once the deeper underlying cause has been ascertained. (?)

[son_of_flubber]

On Wednesday, September 27, 2017 at 1:57:40 AM UTC-4, Ramy wrote:

> Sigh, just when we hoped this is is the most reliable sustainer solution.

I wonder if we'll see 'Single Use' FES battery packs based on https://www.amazon.com/DURACELL-Package-PROCELL-Professional-Alkaline/dp/B00VOEP7Y0/ref=sr_1_5_a_it?ie=UTF8&qid=1506534470&sr=8-5&keywords=d%2Bcell%2Bbatteries&th=1

Cheaper than landing out.

[[email protected]]

On Wednesday, September 27, 2017 at 1:50:58 PM UTC-4, son_of_flubber wrote:
> On Wednesday, September 27, 2017 at 1:57:40 AM UTC-4, Ramy wrote:
>
> > Sigh, just when we hoped this is is the most reliable sustainer solution.
>
> I wonder if we'll see 'Single Use' FES battery packs based on https://www.amazon.com/DURACELL-Package-PROCELL-Professional-Alkaline/dp/B00VOEP7Y0/ref=sr_1_5_a_it?ie=UTF8&qid=1506534470&sr=8-5&keywords=d%2Bcell%2Bbatteries&th=1
>
> Cheaper than landing out.

How well do you think they will handle the 200 amp load?
UH

[Renny[_2_]]

On Tuesday, September 26, 2017 at 11:57:40 PM UTC-6, Ramy wrote:
> Thanks for sharing.
> This is not good.
> Thankfully in both cases it happened on the ground.
> The talks about improving the warning system, as if one can always "land immediately" if fire starts, does not make me feel any better. In fact, it may be better to bail out while high than attempt to land immediately.
>
> Sigh, just when we hoped this is is the most reliable sustainer solution.
>
>
> Ramy

Ramy,
Keep the faith on the FES. It is an excellent system and is here to stay. I have flown with the FES for 6 years without issue and plan to fly with it for many years to come.

Now, like any system it is crucial that the manuals be read and that all operational procedure be properly followed. If proper procedures are followed and the batteries are properly handled and maintained, then the FES is a safe system and will operate as advertised. Now, we know that the investigation is still on-going so let there be no doubt that whatever recommendations result, will make the FES system even better and safer!

Thanks - Renny

[Charlie M. (UH & 002 owner/pilot)]

Can't multi post here......:-(

Based on this..... https://d2ei442zrkqy2u.cloudfront.net/wp-content/uploads/2016/03/PC13US12141.pdf , they only show a max of 3A load for a single cell.
The link from SoF is just a bulk pack of D cells, not a "battery pack". So, to gets amps from 1.5VDC, you wire in parallel, lots of cells can be a lot of amps, but at 1.5VDC.
To get meaningful volts, you wire in series, lots of volts, but at about 3 amps.

To do FES, you need multiple groups. Each group in series to get the volts needed, lots of those to get the amps and runtime.

Sounds like thousands of dollars, lots of weight (alkaline has a low power density vs. weight compared to Lion or LiPo).

Just saying......at SoF............I know HN understands this.
;-)