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Anyone install battery aft of Baggage bay bulkhead

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VE3LVO(at)rac.ca
Guest

Posted: Sat Sep 23, 2006 6:25 pm Post subject: Anyone install battery aft of Baggage bay bulkhead

Cheers,

            If you want to compare weights, I ordered 20 feet of #4 CCA 

(copper-covered alu) wire from Perihelion and Eric Jones. I expect to 

install a 17Ah battery under one of five compartments built under the 

extended bulkhead 'shelf'

It weighs 48.75 gm/ft. I was going to use #4 welding cable (rubber-covered) 

which is 127gm/ft - because of its flexibility and rather innocuous smoke 

when heated (archives). I don't know the weight /foot of #4aircraft cable 

but it may be determined I'm sure.

            The length involved may be less than 20 feet, but that too I 

leave to you. The advantages beyond the weight are (1) more flexible than 

a/c cable; (2) better insulation than welding cable (a/c standard); (3) 

yellow colour makes it more readily obvious; (4) fits neatly in 12mm/half 

inch copper tubing for nearby ground - watch the chafing..; (5) Eric is 

great to deal with and has excellent installation advice.

           Minor disadvantages :

(1) More expensive - stop smoking, nothing much on a big ship;

(2) slightly larger - see 4 above.

I feel better about shifting the battery with this material, but of course 

you are the final judge. Nevertheless, maximum time of starter engagement 

must be calculated when using aft battery........



Regards

Ferg Kyle

Europa A064 914 Classic

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wdaniell(at)etb.net.co
Guest

Posted: Sun Sep 24, 2006 4:24 am Post subject: Anyone install battery aft of Baggage bay bulkhead

Err another question "maximum time of starter engagement"  Whats this?



Will 



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paul.mcallister

Joined: 09 Jan 2006
Posts: 177
Location: Waukesha, WI USA

Posted: Sun Sep 24, 2006 6:34 am Post subject: Anyone install battery aft of Baggage bay bulkhead

I seem to recall putting in 22' of welding cable.  If I use Ferg's numbers

that gives a weight difference of 1741 gram / 3.7 pounds over #4 welding

cable.  Seems like a worth while saving.



Paul




 	  Quote: 	
		  Cheers,

            If you want to compare weights, I ordered 20 feet of #4 CCA

(copper-covered alu) wire from Perihelion and Eric Jones. I expect to

install a 17Ah battery under one of five compartments built under the

extended bulkhead 'shelf'

It weighs 48.75 gm/ft. I was going to use #4 welding cable (rubber-covered)

which is 127gm/ft - because of its flexibility and rather innocuous smoke

when heated (archives). I don't know the weight /foot of #4aircraft cable

but it may be determined I'm sure.

Ferg

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rparigor(at)suffolk.lib.n
Guest

Posted: Sun Sep 24, 2006 8:50 am Post subject: Anyone install battery aft of Baggage bay bulkhead

Wire weight in pounds per hundred feet:



Eric #4 Yellow Poly Vinyl TPE Property 105C                           

10.75

McMaster Vu-Tron#4weld1045strand Orange chlorinated polyethylene 90C  

21.00

McMaster Standard#4weld406strand Black EPDM rubber105C                

20.00

Spruce #4 MIL-W-22759/16 approx 133strand 25gauge 150C                

16.00

McMaster Vu-Tron#6weld660strand Orange chlorinated polyethylene 90C   

15.00

McMaster Standard#6weld259strand Black EPDM rubber105C                

14.00

Spruce #6 MIL-W-22759/16 approx 133strand 27gauge 150C                

10.50

Weight savings of Erics #4 for 25 feet:



Vu-Tron#4    2.56

Standard#4   2.31

Spruce #4    1.31

Vu-Tron#6    1.06

Standard#6   0.81

Spruce #6    (.06)



            Ohms/1000(at)20C  Voltage drop 20amps 25feet    Volatge drop

60/25 

Eric#4         ~.25                    .125                       .375

Vu-Tron        ~.26                    .130                       .390

Standard       ~.25                    .125                       .375

Spruce #4      ~.27                    .135                       .405

Vu-Tron#6      ~.44                    .220                       .660

Standard#6     ~.45                    .225                       .665

Spruce #6      ~.44                    .220                       .660



#6 would drop a little over a volt for 10 amps.



Ron Parigoris

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rparigor(at)suffolk.lib.n
Guest

Posted: Sun Sep 24, 2006 8:55 am Post subject: Anyone install battery aft of Baggage bay bulkhead

OOOOOOOPS thats a little over .1volts for 10 amps and #6



Ron Parigoris



On Sun, Sep 24, 2006, rparigor(at)suffolk.lib.ny.us said:



 	  Quote: 	
		   Wire weight in pounds per hundred feet:

 

 Eric #4 Yellow Poly Vinyl TPE Property 105C                           

 10.75

 McMaster Vu-Tron#4weld1045strand Orange chlorinated polyethylene 90C  

 21.00

 McMaster Standard#4weld406strand Black EPDM rubber105C                

 20.00

 Spruce #4 MIL-W-22759/16 approx 133strand 25gauge 150C                

 16.00

 McMaster Vu-Tron#6weld660strand Orange chlorinated polyethylene 90C   

 15.00

 McMaster Standard#6weld259strand Black EPDM rubber105C                

 14.00

 Spruce #6 MIL-W-22759/16 approx 133strand 27gauge 150C                

 10.50

 

 

 Weight savings of Erics #4 for 25 feet:

 

 Vu-Tron#4    2.56

 Standard#4   2.31

 Spruce #4    1.31

 Vu-Tron#6    1.06

 Standard#6   0.81

 Spruce #6    (.06)

 

             Ohms/1000(at)20C  Voltage drop 20amps 25feet Volatge drop 60/25 

 Eric#4         ~.25                    .125                       .375

 Vu-Tron        ~.26                    .130                       .390

 Standard       ~.25                    .125                       .375

 Spruce #4      ~.27                    .135                       .405

 Vu-Tron#6      ~.44                    .220                       .660

 Standard#6     ~.45                    .225                       .665

 Spruce #6      ~.44                    .220                       .660

 

 #6 would drop a little over a volt for 10 amps.

 

 Ron Parigoris

 

 

 

 

 


	


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