Question though....is there not a a capacitor anywhere in the rotax charging
setup?
If there is, the switches would not save one from sparks as the charge on
the capacitor will more than happily provide a spark when it's wires get shorted
in a crash.
Cheers,
Pete
> On Oct 11, 2013, at 6:24 AM, Frans Veldman <frans@privatepilots.nl> wrote:
>
>
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>> On 10/11/2013 12:09 PM, Alan Carter wrote:
>>
>> I am wiring my new FFM directly to the battery with fuse and
>> switch, so in the event that If ever i kill the lot, I will still
>> have engine running and fuel indications.
>
> What's wrong with wiring the fuel pump to the alternator?
>
> If you wire it to the battery, you are defying the purpose of the
> master switch. In a crash landing, I wouldn't care whether the spark
> that ignites my leaking fuel was coming from my GPS or from my fuel
> indicators or fuel pump. (Not to mention the fact that the fuel pump
> may continue to run after the crash, something you might not desire if
> there is a fuel leak upstreams).
> If you wire to the alternator, nothing can go wrong, assuming that the
> engine will stop at impact and the electricity is long gone before you
> come to a stop.
>
> I must say that I'm a bit surprised how many people easily modify the
> fuel system and/or electrical system, without understanding what the
> reasons were why it was designed in that specific way.
>
> Don't fix something that isn't broken!
>
> Frans
>
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