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Bob.Fairall(at)fairalls.c
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 Posted: Sun Jun 06, 2010 12:04 pm Post subject: Europa - Battery cable sizing |
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Hi all,
Please may I have some advice on battery cable size.
My existing Europa uses 2AWG cables. In the interests of weight saving, on my new ‘XS’ Mono I have started installing 4awg cable for the approx 7’6” run. However, I’m now a little concerned that 4awg will be sufficiently heavy.
Many thanks in anticipation.
Bob Fairall
Kit 71 - 420 hours and going strong.
Kit 494 – getting there!!
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kevann(at)gotsky.com
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| Posted: Sun Jun 06, 2010 1:29 pm Post subject: Europa - Battery cable sizing |
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Hi Bob,
the link below will show you an option that I and many others have used.The 4awg is serving me well in my XS mono 914
Kevin
http://www.periheliondesign.com/fatwires_files/fatwire2flyer.pdf
[quote] ---
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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rparigoris
Joined: 24 Nov 2009
Posts: 796
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| Posted: Sun Jun 06, 2010 2:30 pm Post subject: Re: Europa - Battery cable sizing |
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Just a quick note on CCA, I too have an aft mounted battery on 914 mono (not yet flying) and am using #4 CCA, the dameter of #4 CCA is closer to #2 Tefzel standard copper wire than #4 Tefzel wire but the resistance is almost identical to #4 tefzel.
Ron Parigoris
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Bob.Fairall(at)fairalls.c
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tonyrenshaw268(at)gmail.c
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| Posted: Mon Jun 07, 2010 12:09 am Post subject: Europa - Battery cable sizing |
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Gidday,
Do I need the same gauge of AWG wire back to my battery from my negative terminal bus??
Reg
Tony Renshaw
Sydney Aussie
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tonyrenshaw268(at)gmail.c
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| Posted: Mon Jun 07, 2010 1:07 am Post subject: Europa - Battery cable sizing |
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Gidday Ron,
I see you have your battery in the back. Great. I will too, but how far back I'm not sure. I intend on placing it underneath the rear luggage area, on a suspended shelf. I did consider putting it further aft, and in fact I have built a fuselage mounted stowage just forward of the aft tail bulkhead, but I reckon if I had a big crash it might end up in the back of my head! So, I reckon if I put it behind the cockpit module, it has a long way to go to get to the back of my head, or the poor unfortunate that I crash with. I wouldn't normally tell this story but I did take a girl that I was newly dating in Papua New Guinea for her first flight in a light aircraft when I was hit by windshear landing on a 300 metre strip, with 14 degrees of slope, and we crashed. So, it can happen, and I know first hand.
Could you please tell me about your battery location, and maybe you could give me your opinion of my plan, to put it under the luggage shelf, to track the positive to a kill switch on the back of the passenger headrest, and then up to my positive bus bar. Thanks.
R
TR
On 07/06/2010, at 8:30 AM, rparigoris wrote:
| Quote: |
Just a quick note on CCA, I too have an aft mounted battery on 914 mono and am using #4 CCA, the dameter of #4 CCA is closer to #2 Tefzel standard copper wire than #4 Tefzel wire but the resistance is almost identical to #4 tefzel.
Ron Parigoris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=300261#300261
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Brian Davies
Joined: 10 Jan 2006
Posts: 124
Location: uk
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| Posted: Mon Jun 07, 2010 3:25 am Post subject: Europa - Battery cable sizing |
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Yes.
Brian Davies
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rparigoris
Joined: 24 Nov 2009
Posts: 796
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| Posted: Mon Jun 07, 2010 6:32 am Post subject: Re: Europa - Battery cable sizing |
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Hi Tony
"Could you please tell me about your battery location, and maybe you could give me your opinion of my plan"
My Odyssey 545 is mounted aft of baggage bay ribs, pretty stuck to fuse. I have a mono XS with 914, intercooler, Airmaster and SD20S alternator on vacuum pad, thus XS in this config tending to be nose heavy. It is accessible through d-opening without too much effort. Had problems with strobe noise from my Kunzleman strobes getting into AAE nav/com antenna on port side of fuse even with strobe PS on wingtips, battery influences antenna location.
As far as your plan, I don't know how aft you need CG. If you mount where you say, you could always add some lead to sternpost if needed. Many prefer to keep battery on firewall footwells and add lead aft if needed. I did calculation and with CCA will save weight over footwell mounting (just a little it is in links below I think). It also makes sense since I wanted battery switch and other electrics in headrest.
Links and details:
http://www.europaowners.org/forums/gallery2.php?g2_itemId=30502
http://www.europaowners.org/forums/gallery2.php?g2_itemId=30683
http://www.europaowners.org/forums/gallery2.php?g2_itemId=30710
If you want read about strobe problems that battery influences:
http://www.europaowners.org/forums/gallery2.php?g2_itemId=31409
Ron Parigoris
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