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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