Today's Message Index:
----------------------
1. 12:44 AM - Re: New toy in the AEC shop . . . (Michael Pereira)
2. 06:54 AM - Re: New toy in the AEC shop . . . (Eric M. Jones)
3. 08:53 AM - Re: New toy in the AEC shop . . . (Robert L. Nuckolls, III)
4. 03:23 PM - acs sb92-01 (Bill and Marsha)
5. 04:08 PM - Re: acs sb92-01 (Sam Hoskins)
6. 06:19 PM - Ignition control in a dual alternator dual bus system (Dr. Leo Davies)
7. 09:27 PM - Re: Ignition control in a dual alternator dual bus system (Robert L. Nuckolls, III)
8. 10:50 PM - Re: Ignition control in a dual alternator dual bus system (Dr. Leo Davies)
Message 1
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Subject: | Re: New toy in the AEC shop . . . |
> > Hmmmm . . . wonder if I need to hit up Mr. Gore
> > for some carbon-credits. I'm going to dump about
> > 100# of CO2 this weekend. Maybe I'd better get
> > him to plant some trees for me or something.
> >
>
> If planting a young tree earns carbon credits, then not cutting down an
> old tree should be worth even more credits. I have a few thousand pine
> trees that I promise not to cut down. You are welcome to apply those
> credits to your temperature chamber.
I'll just promise not to exhale on alternate breaths. If that doesn't work,
well, reduce co2, kill a mammal.
c'ya,
Mike
Message 2
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Subject: | Re: New toy in the AEC shop . . . |
We once developed a device that had designers in Switzerland and the US. Whenever
the power supply in the device was tested in Switzerland it passed all tests
in the environmental chamber. When tested in the US it flunked due to a load
resistor that would overheat an output filter capacitor in a purchased UL/CSA/IEC/TUV
power supply. The prototypes seemed to be in Fedex transit permanently
and accusation flew, and schedules flew too...out the window. The Swiss environmental
chamber was super-high tech and had powerful mixing fans to make sure
that nothing in the chamber deviated from anything else by more than 1/10 degree.
The power supply worked very well inside the chamber. But no place else.
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones@charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=167238#167238
Message 3
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Subject: | Re: New toy in the AEC shop . . . |
At 02:16 PM 3/1/2008 -0500, you wrote:
><retasker@optonline.net>
>
>
>Robert L. Nuckolls, III wrote:
>>Hmmmm . . . wonder if I need to hit up Mr. Gore
>>for some carbon-credits. I'm going to dump about
>>100# of CO2 this weekend. Maybe I'd better get
>>him to plant some trees for me or something.
>You are dumping pre-existing CO2 - not making more of it. Carbon credits
>apply to a process that creates CO2 from a source where carbon is
>previously trapped, chemically or otherwise. Granted, compressing it does
>take energy, but probably not any more than using a refrigerated
>environmental chamber rather than one cooled by CO2.
Good point.
Bob . . .
Message 4
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Can anyone point me to a link wha I can find this service bulletin (acs
sb92-01) Thanks Bill S.
Message 5
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Just plug it into Google.
*Sam Hoskins
Murphysboro, IL
Quickie Blog <http://www.samhoskins.blogspot.com>
Quickie Website <http://home.mchsi.com/%7Eshoskins/index.htm>
**On Sun, Mar 2, 2008 at 5:19 PM, Bill and Marsha <docyukon@ptcnet.net>
wrote:
*
>
> * Can anyone point me to a link wha I can find this service bulletin (acs
> sb92-01) Thanks Bill S.*
>
> *
>
> *
>
> *
*
Message 6
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Subject: | Ignition control in a dual alternator dual bus system |
Dear List,
I am currently designing the electrical system for my "all-electric" RV
10. I have been very happy with Bob's architecture for my RV6A which
worked beautifully the day my alternator died in the clouds.
I am looking at the Z-14 schematic which involves two batteries, two
alternators and a cross feed for starting and for electron sharing in
failure mode.
I note that there are no switching diagrams for mags or other ignition
systems on this diagram. I wondered what the implications for mag
switching were in this setup. Should they just have simple switches but
only turn on the impulse coupled mag for a start? If so, how serious are
the implications if the non-coupled mag is accidentally enabled at
startup? If I ran an electronic system on the left would you only turn
this on after start and again stick with impulse coupling on the
standard mag for the start.
I would be pleased to hear from anyone who has used this schematic as
the basis for their electrical system as to how they had handled the
ignition switching.
Thanks for your help.
Leo Davies
--
A/Prof Leo Davies,
Sub-Dean, Head of Assessment,
Faculty of Medicine,
Edward Ford Building,
University of Sydney 2006
Message 7
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Subject: | Re: Ignition control in a dual alternator dual bus |
system
At 01:30 PM 3/3/2008 +1100, you wrote:
><leo@icn.usyd.edu.au>
>
>Dear List,
>
>I am currently designing the electrical system for my "all-electric" RV
>10. I have been very happy with Bob's architecture for my RV6A which
>worked beautifully the day my alternator died in the clouds.
>
>I am looking at the Z-14 schematic which involves two batteries, two
>alternators and a cross feed for starting and for electron sharing in
>failure mode.
>
>I note that there are no switching diagrams for mags or other ignition
>systems on this diagram. I wondered what the implications for mag
>switching were in this setup. Should they just have simple switches but
>only turn on the impulse coupled mag for a start? If so, how serious are
>the implications if the non-coupled mag is accidentally enabled at
>startup? If I ran an electronic system on the left would you only turn
>this on after start and again stick with impulse coupling on the standard
>mag for the start.
>
>I would be pleased to hear from anyone who has used this schematic as the
>basis for their electrical system as to how they had handled the ignition
>switching.
>
>Thanks for your help.
Leo, Why such a heavy, complex, expensive electrical system?
How about going with Z-13/8 and use the money you saved to
put at least one E-Mag on? Leave your impulse coupled mag in
place and replace the non-coupled with an E or better yet,
a P-Mag. Then, both ignitions can be ON for cranking. If
you ever have the coupled-mag crap, you can put the non-
coupled back on and wire it like Z-27. Make both ignition
switches a DPDT ON-ON (S702-3 or equal) from the get-go.
This will produce an exceedingly reliable system with
a minimum of cost and get you a really nice sparking
ignition for cranking.
Bob . . .
Message 8
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Subject: | Re: Ignition control in a dual alternator dual bus |
system
Robert L. Nuckolls, III wrote:
> <nuckolls.bob@cox.net>
>
> At 01:30 PM 3/3/2008 +1100, you wrote:
>
>> <leo@icn.usyd.edu.au>
>>
>> Dear List,
>>
>> I am currently designing the electrical system for my "all-electric"
>> RV 10. I have been very happy with Bob's architecture for my RV6A
>> which worked beautifully the day my alternator died in the clouds.
>>
>> I am looking at the Z-14 schematic which involves two batteries, two
>> alternators and a cross feed for starting and for electron sharing in
>> failure mode.
>>
>> I note that there are no switching diagrams for mags or other
>> ignition systems on this diagram. I wondered what the implications
>> for mag switching were in this setup. Should they just have simple
>> switches but only turn on the impulse coupled mag for a start? If so,
>> how serious are the implications if the non-coupled mag is
>> accidentally enabled at startup? If I ran an electronic system on the
>> left would you only turn this on after start and again stick with
>> impulse coupling on the standard mag for the start.
>>
>> I would be pleased to hear from anyone who has used this schematic as
>> the basis for their electrical system as to how they had handled the
>> ignition switching.
>>
>> Thanks for your help.
>
>
> Leo, Why such a heavy, complex, expensive electrical system?
>
> How about going with Z-13/8 and use the money you saved to
> put at least one E-Mag on? Leave your impulse coupled mag in
> place and replace the non-coupled with an E or better yet,
> a P-Mag. Then, both ignitions can be ON for cranking. If
> you ever have the coupled-mag crap, you can put the non-
> coupled back on and wire it like Z-27. Make both ignition
> switches a DPDT ON-ON (S702-3 or equal) from the get-go.
>
> This will produce an exceedingly reliable system with
> a minimum of cost and get you a really nice sparking
> ignition for cranking.
>
> Bob . . .
>
Bob,
Thank you for your prompt reply.
The thing that had primarily motivated me towards the Z-14 was the fact
that I am planning to install a Garmin G900X. The specs for this
nominate a current draw of 16-28 amps!
With this mighty beast sucking electrons I was moved towards the B&C 20
amp alternator as a backup and the added reserve of two PC680 batteries
to provide some buffer, as well as additional cranking power for that
big 6 cylinder engine.
I have, as stated above, been very happy with the performance of your
architecture in my current plane so am not inclined to ignore your
suggestions. Having said that, the B&C alternator and regulator have
performed so nicely I was quite looking forward to having two of
them.... ;-)
Do you think the Z 13/8 would carry the Garmin? I sure hate to turn off
all that good stuff just cause an alternator has gone belly up.
Thanks again,
Leo
>
>
> !DSPAM:47cb911624381654078673!
--
A/Prof Leo Davies,
Sub-Dean, Head of Assessment,
Faculty of Medicine,
Edward Ford Building,
University of Sydney 2006
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