Today's Message Index:
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1. 02:05 PM - Beginnings of my Tailwind Electrical System (Gerry van Dyk)
2. 04:09 PM - Re: Beginnings of my Tailwind Electrical System (M Wilson)
3. 07:17 PM - Re: Beginnings of my Tailwind Electrical System (Charlie England)
Message 1
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| Subject: | Beginnings of my Tailwind Electrical System |
Hello all
I'm deep in thought working on the power distribution for my Tailwind
Project. I'm working towards a Z13/8 implementation, the Z101 extras
don't hold much appeal or utility for me. I hope some of you learned
gents could give my proposed system a quick look. It's pretty basic so
far.
I'm not ready to offer my basic bus power distribution drawing or load
analysis just yet. But I'd like to ask a question or two as I'm
wrapping my head around all the issues.
I note on all the Z drawings the wire from the battery contactor to the
main bus is not fused. Is this similar to the starter cables, in that
it's a fat wire that is unlikely to be compromised?
On the Z13/8 drawing I see a double pole single throw switch is used to
bring up the main alternator (Plane Power AS 12-E160 in my case) and the
battery contactor / main bus. I'm considering using another DPST switch
to bring up the SD-8 and the alt E-bus feed. Is there any condition
where I would want one or the other of those to be switched off?
My current thought is to run the ignition start power for the pair of
P-Mags from the endurance bus. To start the engine I'd turn on the
endurance bus, the low voltage warning should come up as the battery
will be at rest. After starting the engine, the EFIS ammeter should
show the SD-8 supplying power. Bringing up the main bus I'd then switch
off the alt E-bus feed / SD-8 to run on the main alternator. That
should satisfy preflight testing of the backup systems would it not?
I'd appreciate any insights that I'm sure I'm missing so far. I've
attached a basic sketch of my proposed bus power distrubution drawing,
and load analysis. If any of you have thoughts or questions please
offer them. With any changes we find we need, I'll then get stuck in
with a more complete power distrubution drawing.
Thanks for any help you all can provide.
Gerry van Dyk
Tailwind W10 C-GVDZ
Message 2
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| Subject: | Re: Beginnings of my Tailwind Electrical System |
Hi Gerry,
I just finished my Tailwind this year.=C2- =C2-I went with a simple Z-1
1 approach.
The main feed from the battery contactor should be routed carefully to prev
ent compromise.=C2- If you smell smoke the first thing to do is turn of t
he master.=C2- That is what ultimately protects that line.I put my single
P-mag on the main bus.=C2- I don't know how you are wiring your starter
but it is typically powered off of the main which is where you want your P-
mag power to come from.=C2- To start I turn on the master with the e-bus
off.
After the engine starts I turn on the avionics master and e-bus ( which is
actually avionics alternate feed).=C2- The engine gauges (EIS) are powere
d off of the main bus so that I can check them before engine start.Just som
e thoughts.=C2-=C2-
-Mike
On Tuesday, December 26, 2023 at 04:17:35 PM CST, Gerry van Dyk <gerry.
vandyk@eastlink.ca> wrote:
Hello allI'm deep in thought working on the power distribution for my Tail
wind Project.=C2- I'm working towards a Z13/8 implementation, the Z101 ex
tras don't hold much appeal or utility for me.=C2- I hope some of you lea
rned gents could give my proposed system a quick look.=C2- It's pretty ba
sic so far.
I'm not ready to offer my basic bus power distribution drawing or load anal
ysis just yet.=C2- But I'd like to ask a question or two as I'm wrapping
my head around all the issues.
I note on all the Z drawings the wire from the battery contactor to the mai
n bus is not fused.=C2- Is this similar to the starter cables, in that it
's a fat wire that is unlikely to be compromised?
On the Z13/8 drawing I see a double pole single throw switch is used to bri
ng up the main alternator (Plane Power AS 12-E160 in my case) and the batte
ry contactor / main bus.=C2- I'm considering using another DPST switch to
bring up the SD-8 and the alt E-bus feed.=C2- Is there any condition whe
re I would want one or the other of those to be switched off?
My current thought is to run the ignition start power for the pair of P-Mag
s from the endurance bus.=C2- To start the engine I'd turn on the enduran
ce bus, the low voltage warning should come up as the battery will be at re
st.=C2- After starting the engine, the EFIS ammeter should show the SD-8
supplying power.=C2- Bringing up the main bus I'd then switch off the alt
E-bus feed / SD-8 to run on the main alternator.=C2- That should satisfy
preflight testing of the backup systems would it not?
I'd appreciate any insights that I'm sure I'm missing so far.=C2- I've at
tached a basic sketch of my proposed bus power distrubution drawing, and lo
ad analysis.=C2- If any of you have thoughts or questions please offer th
em.=C2- With any changes we find we need, I'll then get stuck in with a m
ore complete power distrubution drawing.
Thanks for any help you all can provide.
Gerry van DykTailwind W10 C-GVDZ
Message 3
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| Subject: | Re: Beginnings of my Tailwind Electrical System |
'Current thought'. I like it. ;-)
The master contactor provides circuit protection for the 'fat' wires
(manual trip mode).
Charlie
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On Tue, Dec 26, 2023 at 4:08=AFPM Gerry van Dyk <gerry.vandyk@eastlin
k.ca>
wrote:
> Hello all
> I'm deep in thought working on the power distribution for my Tailwind
> Project. I'm working towards a Z13/8 implementation, the Z101 extras don
't
> hold much appeal or utility for me. I hope some of you learned gents cou
ld
> give my proposed system a quick look. It's pretty basic so far.
>
> I'm not ready to offer my basic bus power distribution drawing or load
> analysis just yet. But I'd like to ask a question or two as I'm wrapping
> my head around all the issues.
>
> I note on all the Z drawings the wire from the battery contactor to the
> main bus is not fused. Is this similar to the starter cables, in that it
's
> a fat wire that is unlikely to be compromised?
>
> On the Z13/8 drawing I see a double pole single throw switch is used to
> bring up the main alternator (Plane Power AS 12-E160 in my case) and the
> battery contactor / main bus. I'm considering using another DPST switch
to
> bring up the SD-8 and the alt E-bus feed. Is there any condition where I
> would want one or the other of those to be switched off?
>
> My current thought is to run the ignition start power for the pair of
> P-Mags from the endurance bus. To start the engine I'd turn on the
> endurance bus, the low voltage warning should come up as the battery will
> be at rest. After starting the engine, the EFIS ammeter should show the
> SD-8 supplying power. Bringing up the main bus I'd then switch off the a
lt
> E-bus feed / SD-8 to run on the main alternator. That should satisfy
> preflight testing of the backup systems would it not?
>
> I'd appreciate any insights that I'm sure I'm missing so far. I've
> attached a basic sketch of my proposed bus power distrubution drawing, an
d
> load analysis. If any of you have thoughts or questions please offer
> them. With any changes we find we need, I'll then get stuck in with a mo
re
> complete power distrubution drawing.
>
> Thanks for any help you all can provide.
>
> Gerry van Dyk
> Tailwind W10 C-GVDZ
>
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