REFLECTOR: Batteries

David Scharfenberg dave at winco.net
Tue Jul 21 08:30:12 CDT 2009


My batteries are in the nose, ahead of the canard bulkhead.  I ran a  
short #2 cable from battery 2 (+) to the support on the bottom of the  
battery bracket and bolted it to the fiberglass support with a 3/8"  
bolt and two nuts.  The same for the common battery ground.  Also put  
terminal caps on the bolts.  Now it is very easy to jump the batteries  
by reaching into the nose gear hole, plus I use the ground bolt to  
ground the plane for fueling when the truck is parked in front.

Dave Scharfenberg




On Jul 21, 2009, at 5:47 AM, Terry Miles wrote:

I am going to tack on to what Jim has said here.  I have a pair of  
925s that is run to isolated buses for pre-flight and start up ground  
ops.  I then switch to parallel ops when the alternator is on line.  I  
have the batts over on their side and worry about the bolts getting  
loose w/ vibration.  The metal is very soft so you can't honk down on  
the torque with abandon, and there is not a lot of working space to  
fit a wrench.

Ditto too on planning for access for ground charging, and for relative  
ease of removal/replacement out the top hatch as Jim points out.  As  
everyone has pointed out the 925 has plenty of power, but remember if  
you use the lighter skytec starter you have to get something like 10v  
back to the starter coil so it can do it's thing and port all that  
juice to the starter itself.  I have had trouble in that department.
Terry

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]  
On Behalf Of Jim Agnew
Sent: Monday, July 20, 2009 18:45
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Batteries

OK Brooke here we go,

Start with the top terminal battery and bolts for really reliable  
connections and it  is easist to get at the terminals if you need to  
hook up a charger or anything else.

I have a metal cased battery and by the use of a thin putty-knife you  
can separate the steel case from the battery (the battery people  
recommend this) drill some holes in the bottom and countersink for  
some SS flat head machine screws and bolt the case to the battery tray  
(4-6 # 10 machine screws will do nicely) and you have a very strong  
battery box that you can drop the battery in or replace it. You can  
either buy a battery hold down at an automotive store or make your own.

I like to place the terminals closest to the hull to keep them as far  
away as I can from anything that might come loose and short. I also  
prefer the positive terminal closest to the canard bulkhead if  
possible so I have the lead to the Master solenoid is as short as  
possible.

Remember if you use the steel battery box that you must have enough  
space to get the battery in with the upper fuselage in place. It also  
has to go thru you access hatch so check carefully.

Jim




James F. Agnew

Jim_Agnew_2 at Yahoo.Com

Tampa, FL

Velocity 173 Elite Aircraft Completed & Flying



From: Brooke Wolf <bwolf1 at tds.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Sent: Monday, July 20, 2009 5:52:20 PM
Subject: REFLECTOR: Batteries

I was contemplating installing the battery tray on my XLRG-5.  Like  
everything else, one thought leads to another and pretty soon I am  
thinking about the entire electrical system and still not getting  
anything done!  Well, I know 2 things for sure....I'm going to need a  
battery and a place to put it.  I've got the battery tray so why not  
order the battery so I can make sure it all fits together.  That is  
where I need the help of the collective.

I like the Odyssey 925.  I talked to Scott Swing today and Velocity  
likes the Odyssey 925.  So, an Odyssey 925 is what it is going to be!   
There are a variety of 925's.  See http://www.odysseybatteries.com/battery/pc925lmj.htm 
.  My question is which one is best?  Terminals up or on the side?   
Negative terminal forward or aft?  SAE or M6 bolt terminal? Metal  
jacket or not?  What kind of hold down is best?  Lots of questions.  I  
am hoping somebody who has already gone through this will be able to  
shed some light on the battery installation so I don't have to later  
say, "Well I  should have...."  >:)

Any help would be appreciated!  Thanks.

Brooke

BTW, I am also installing Composite Design's Landing Gear Control  
(Gold Box) System.





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