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  #1  
Old 08-14-2020, 05:27 PM
GHARBEN GHARBEN is offline
 
Join Date: Nov 2019
Location: Gainesville, Georgia
Posts: 31
Default Impossible Battery Location

I have owned N12HR for about 10 months. The battery must be replaced. It is located between your feet in the lower part of the aircraft. To replace it will require the removal of the transponder, navcom, and cdi indicator. Also possibly other wires and vacuum hoses.
It appears that an access hole in the lower skin could cure this problem. Any thoughts or experences?
Thanks
G Harben
N12HR
RV 4
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  #2  
Old 08-14-2020, 05:55 PM
fixnflyguy fixnflyguy is offline
 
Join Date: Jan 2006
Location: Winston-Salem, N.C.
Posts: 1,352
Default Thought about that too..

While I was building my -4, I gave a thought to a simple access door as you mention. After much pondering, i decided against it for several reasons. I also have some stuff in the way, but it's not bad to move it. Future plans will likely put the battery on the firewall, and be done with tunnel diving. I have been flying mine for 10 years, and dont really have much battery maintenance. I have it wired for a tender that has plug in oil door, and I use the Batteries Plus wheelchair battery that has been fly and forget..maybe just lucky!
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Bill E.
RV-4/N76WE
8A7 / Advance NC
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  #3  
Old 08-14-2020, 10:37 PM
N184DA's Avatar
N184DA N184DA is offline
 
Join Date: Jun 2007
Location: Tacoma, WA
Posts: 137
Default

Mine is in the same location, and to make matters worse, I have a center radio stack.
So yeah, it’s a half day job to replace the battery which is why I am on a three-year, mandatory replacement plan, whether it needs it or not.
I’d much rather deal with it in my own hangar.

If I could, I’d kick the builder in the behind for the design but that means I’d just be hurting myself
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Derrick L. Aubuchon
RV4 (Flying, approx 900hrs)
Tacoma Narrows Airport (TIW), WA
dlaubuchon@gmail.com

(2020/2021 dues paid)
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  #4  
Old 08-14-2020, 11:49 PM
Norman CYYJ Norman CYYJ is offline
 
Join Date: Feb 2005
Location: Victoria B.C.
Posts: 1,292
Default

When I redid the panel in my RV4 I removed the battery and put it on the engine side of the firewall. Extremely easy to service and you can reach the terminals thru the oil door if need be.
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  #5  
Old 08-15-2020, 06:08 AM
GHARBEN GHARBEN is offline
 
Join Date: Nov 2019
Location: Gainesville, Georgia
Posts: 31
Default

Sounds like moving the battery to the other side of the firewall is the answer. Should help the center of gravity also. Thanks for the help! In the meantime, I am headed to the airport to move the radios and replace the battery.
G Harben
N12HR
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  #6  
Old 08-17-2020, 09:25 AM
GHARBEN GHARBEN is offline
 
Join Date: Nov 2019
Location: Gainesville, Georgia
Posts: 31
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While we are talking about batteries. What battery is the best. I have to buy a new one. I have generally used Concord.
Thanks
G Harben
N12HR
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  #7  
Old 08-17-2020, 09:54 AM
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N184DA N184DA is offline
 
Join Date: Jun 2007
Location: Tacoma, WA
Posts: 137
Default

Quote:
Originally Posted by GHARBEN View Post
While we are talking about batteries. What battery is the best. I have to buy a new one. I have generally used Concord.
Thanks
G Harben
N12HR
I use the Concord RG-25 XC.

I can;t use an Odyssey because I need that extra weight up front
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Derrick L. Aubuchon
RV4 (Flying, approx 900hrs)
Tacoma Narrows Airport (TIW), WA
dlaubuchon@gmail.com

(2020/2021 dues paid)
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  #8  
Old 08-17-2020, 11:25 AM
MS1095 MS1095 is offline
 
Join Date: Jun 2016
Location: West Chester, PA
Posts: 123
Default

The Odyssey is much smaller and easier for a firewall mount, but I do understand wanting weight in the nose on a 4 too.
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  #9  
Old 08-17-2020, 07:31 PM
GHARBEN GHARBEN is offline
 
Join Date: Nov 2019
Location: Gainesville, Georgia
Posts: 31
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What model number of the Odyssey battery are you talking about?
Thanks
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  #10  
Old 08-18-2020, 06:34 PM
Vac Vac is offline
 
Join Date: Jul 2009
Location: Niceville, Florida
Posts: 453
Default

You may want to consider a PC-680 on the firewall and a heavier crush plate for the propeller to maintain desired CG. Battery maintenance is much simpler and battery and crush plate may weigh less than current Concord after you’ve done the math.

Cheers,

Vac
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Mike Vaccaro
RV-4 2112
Niceville, Florida
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