REFLECTOR: Battery Questions

Chuck Jensen cjensen at dts9000.com
Sat May 26 16:35:50 CDT 2007


Hiroo,
 
I just drilled a hole in each side of the battery support base and ran
the lightest gauge battery cable I could find down to bolts with wing
nuts on them.  The wing nuts give you something to hook the jumper
cables or battery charger alligator clamps on.  Of course, this works
best on an RG so that a person can reach up into the nose area from the
nose gear opening.  If you have a fixed gear, then a Piper or Cessna
plug might be a smarter way to go.  Incidently, I put one of those big
stick on "+" and "-" that you can buy and any auto parts place.  Might
save hooking it up backwards.  Naturally, a power plug has orientated
pins that you can only plug it in the correct way.  
 
You can also configure a cigarette lighter plug with two leads so you
can charge and jump through the cig lighter, but then you have to leave
your door ajar for the wires or power cable running if the battery
charger is set inside the plane. 

Chuck Jensen 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Hiroo Umeno
Sent: Saturday, May 26, 2007 11:42 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Battery Questions



Quite an interesting stuff.  The datasheet provided all the information
I needed.

 

It seems like they can take quite a bit of punishment and recover fairly
simply.  

 

On a related note, has anyone installed a ground support power plug on
your V?  I am keeping it a habit to plug in a "top-off" charger after
each flight and I am getting sick of undoing the nose hatch every time.

 

Hiroo

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Saturday, May 26, 2007 6:26 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Battery Questions

 

Sid's right, the Odyssey is not a gel-cell.  Most called it a "starved
electrolytic".  

The formula used in their plates can stand a deep cycle much better than
you average "car" battery.

As too how much life you used up is hard to say.  Depends on how old
they are and how they've been treated during that time.  If you had data
on them when they were fresh, you could after recharging do a timed
discharge and measure their response.

 If you are following Knuckoll's method of cycling out a battery every 1
to 2 years I don't think you will have a problem.

Scott



Sid Knox wrote: 

The Odyssey is not a "gel cell", it is a quite different animal.   If
they 
become discharged, they must be bulk-charged properly or they will not
fully 
recover.  They usually come with a "maintenance manual" that describes
the 
proper charging method (otherwise, visit the web site for instructions).
 
My understanding is that if you do the recharge properly, they will
recover 
with no degradation of capacity or life.
 
$ 0.02
 
Sid Knox
Oklahoma
 
Velocity  173 RG  N199RS
Starduster  N666SK
KR2         N24TC
W7QJQ
 
 
 
 
----- Original Message ----- 
From: "Hiroo Umeno" <humeno at microsoft.com> <mailto:humeno at microsoft.com>

To: <reflector at tvbf.org> <mailto:reflector at tvbf.org> 
Sent: Saturday, May 26, 2007 12:06 AM
Subject: REFLECTOR: Battery Questions
 
 
I have a dual Odyssey 680 setup in my plane with a small avionics
backup.
 
Last time I was up at the hangar working on avionics, I managed to
forget to 
turn off the master switch before I left.  I went up today on a
beautiful 
Seattle day and found that both batteries are completely drained.
 
Now, I know the "gel cell" like Odyssey are supposed to be able to
handle 
deep cycle better than the regular batteries  but I am thinking going 
completely dead can't be good for it.  I know on a car batteries, once
you 
let it go completely dead a few times, they are pretty much "done for".
 
Is the gel-cell able to handle the punishment I dished out?  Did I
damage 
the battery and should expect to replace all of them soon?
 
Hiroo
 
 
 
 
 
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