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[OT] boat wiring specificity

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Gilles.Thesee(at)ac-greno
Guest

Posted: Fri Feb 22, 2008 7:22 am Post subject: [OT] boat wiring specificity

Bob and all,



A buddy just asked me some advice about the electrical circuit of the 22 

ft sailing boat he is building for a transatlantic race this summer.

He intends to use lithium batteries and fuel cells to power a navigation 

unit, autopilot, LED navigation lights, one VHF, SSB and a basic GPS.

As several listers here may have experience with ocean racing, would 

anyone give opinions as to the main differences with aviation wiring 

techniques ?



Any input appreciated.

Thanks in advance

Best regards,

-- 

Gilles

http://contrails.free.fr

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nuckolls.bob(at)cox.net
Guest

Posted: Sun Feb 24, 2008 10:54 am Post subject: [OT] boat wiring specificity

At 04:19 PM 2/22/2008 +0100, you wrote:



 	  Quote: 	
		  

<Gilles.Thesee(at)ac-grenoble.fr>



Bob and all,



A buddy just asked me some advice about the electrical circuit of the 22 

ft sailing boat he is building for a transatlantic race this summer.

He intends to use lithium batteries and fuel cells to power a navigation 

unit, autopilot, LED navigation lights, one VHF, SSB and a basic GPS.

As several listers here may have experience with ocean racing, would 

anyone give opinions as to the main differences with aviation wiring 

techniques ?


	


   Energy management tasks for either environment are

   the same. Materials used might benefit from

   judicious selection to accommodate the wet and salty

   environment. Obviously, things not yet blessed

   by the aviation community for use aboard a/c could

   be considered aboard a boat . . . with reservations.



   Yeah, there's plenty of water around to fight fires

   and yeah, temporary distractions of the pilot due

   to systems crises is perhaps lower risk.

   But in my own mind, being hundreds to thousands of

   miles from terrafirm on water is no less hazardous

   than being 1000 feet above terrafirma on air.

   I think I would treat the two design tasks with

   similar caution, quest for robustness, and requirements

   for failure tolerance.



   Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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h&jeuropa

Joined: 07 Nov 2006
Posts: 645

Posted: Tue Feb 26, 2008 6:02 am Post subject: Re: [OT] boat wiring specificity

I've been considering switching to RG batteries in my sailboat.  Batteries are used for all power and the engine isn't run very often.  There is a power charger used in harbor.  The lead acid batteries go 3-4 days without recharge.  Would RG do better?  The conventional batteries are just auto batteries - supposedly deep cycle.  Would I need the same size RG batteries?



Thoughts, opinions, experiences?



Jim Butcher

Europa XS N241BW

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frazitl

Joined: 04 Feb 2008
Posts: 9

Posted: Wed Feb 27, 2008 10:09 am Post subject: Re: [OT] boat wiring specificity

On 2-26 you wrote:



"I've been considering switching to RG batteries in my sailboat. Batteries are used for all power and the engine isn't run very often. There is a power charger used in harbor. The lead acid batteries go 3-4 days without recharge. Would RG do better? The conventional batteries are just auto batteries - supposedly deep cycle. Would I need the same size RG batteries?"



I have no experience with sail boats. but lots of motor home experience.  The hot set-up for motorhomes is AGM battery technology.  About twice as expensive, but no fumes, no mess, better deep cycle performance, and about twice the life.  



I'm about to buy new batteries for my motorhome and am going with AGMs

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_________________
Terry Frazier
RV7A
Finishing

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