Today's Message Index:
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1. 05:00 PM - Z13/8 VS Z12 (don van santen)
2. 07:03 PM - Re: Alternators - To Fuse or not to fuse - That IS the questio (kearney)
3. 07:24 PM - Local Automotive Source for Starter Contactor? (Jared Yates)
4. 07:59 PM - Re: Local Automotive Source for Starter Contactor? (user9253)
5. 08:16 PM - Re: Z13/8 VS Z12 (user9253)
6. 08:45 PM - Re: Re: Local Automotive Source for Starter Contactor? (Charlie England)
Message 1
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Listers,
Roughly eight months ago I asked a question relating to the Z12 diagram. I
stated that I have Z13/8 system and was considering changing to the Z12 to
take advantage of the additional power that the SD20 alternator offers.
Bob responded that he would not recommend this as the Z13/8 offers more
levels of protection. I decided to try to add the added layers of
protection to the Z12.Battery
I am using two PMAGS, the second edition versions that are powered by their
internal alternators as long as the engine rpm remains above 700.
My dual EFIS system uses the TCW backup battery system. The backup
functions as a third power source for the EFIS system. More importantly it
acts as a brown out battery to avoid EFIS rebooting which would cause me to
have no oil pressure information immediately after engine start.
In the end I decided to build the Z12 without the E Bus or the Battery Bus.
I would like to know what failure modes the Z13/8 would handle that the Z12
as described would not.
Thanks in advance for the information as well as any constructive
criticism.
Don
Message 2
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| Subject: | Re: Alternators - To Fuse or not to fuse - That IS |
the questio
Hi Bob
Thank you for the helpful comments. I will likely go with a battery bus and CBs
on the Alternator fields. As I also plan to use the B&C volt regulators shown
in the Z12, I will also have the requisite OV protection.
Cheers
Les
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=471890#471890
Message 3
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| Subject: | Local Automotive Source for Starter Contactor? |
When I attempted to crank my Z13/8 today I got nothing, no click or
anything from the starter contactor. It has been working fine for 250 hours
with no hints of any trouble.
First step was to verify with the meter that I am getting 12v at the
contactor when I engage the start switch, and that is verified, so I'm
thinking the contactor must have gone bad.
One easy option is to order one of these from B&C:
http://www.bandc.aero/intermittentdutystartercontactor.aspx
But he's in Kansas and I'm AOG in North Carolina. I'll call first thing in
the morning to see how long it will take for him to ship one to me.
Bob has said in the list archives that the B&C is a part with automotive
pedigree. Being that there are 5 different brands of auto parts stores
within short driving distance, has anyone found what that automotive
pedigree is? Usually around here the folks that work at those places can't
operate without a year/make/model to put into their computer. So has anyone
found a way to get a similar part from the local chain auto parts store?
Like what kind of car it might have once been used in?
Looking at ebay item 1639535936 it looks very similar, though I gather that
on the ebay option one of the two small terminals needs to be routed to
ground, instead of to a starter engaged indicator. The seller lists in his
compatibility charts that it fits a huge list of ubiquitous vehicles
including the F150, Taurus, etc. If there isn't a closer match to the B&C,
is there a good reason why this one wouldn't be a good choice to get back
in the air safely?
Thanks in advance!
Jared
Message 4
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| Subject: | Re: Local Automotive Source for Starter Contactor? |
Since the eBay seller lists compatible vehicles, why not go to your local auto
parts store and tell them that you want to buy a starter contactor for one of
those vehicles mentioned on eBay?
Bob's website has contactor manufacturer's datasheets.
http://aeroelectric.com/Mfgr_Data.html
Pick one that has mounting holes and internal connections like your old one.
Install an arc suppression diode across the coil with the banded end connected
to the small positive terminal.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=471892#471892
Message 5
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| Subject: | Re: Z13/8 VS Z12 |
I do not know the answer to your question, but I see nothing wrong with your plan,
which is how many aircraft are wired except with the addition of a second
alternator.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=471896#471896
Message 6
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| Subject: | Re: Local Automotive Source for Starter Contactor? |
+1 to what Joe said. Any locally available starter contactor you can
make fit will work.
On 8/15/2017 9:58 PM, user9253 wrote:
>
> Since the eBay seller lists compatible vehicles, why not go to your local auto
parts store and tell them that you want to buy a starter contactor for one of
those vehicles mentioned on eBay?
> Bob's website has contactor manufacturer's datasheets.
> http://aeroelectric.com/Mfgr_Data.html
> Pick one that has mounting holes and internal connections like your old one.
> Install an arc suppression diode across the coil with the banded end connected
to the small positive terminal.
>
> --------
> Joe Gores
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