REFLECTOR: 12 Volt .vs. 24 Volt

[Scott Baker]

14v hydraulic gear pumps are available.  Simple motor swap; plus the relays, 
of course.
SB

----- Original Message ----- 
From: "Andrew Ellzey" <ajlz72756 at yahoo.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Sunday, May 17, 2009 6:32 PM
Subject: Re: REFLECTOR: 12 Volt .vs. 24 Volt



The main issue that kept me from going 28 volt is the XLRG retract system 
hydraulic pump for our Velocities is 12 volts and needs a 30 amp power 
source.

Andy Ellzey



----- Original Message ----
From: Gary Stull <gstull at tampabay.rr.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Sent: Sunday, May 17, 2009 3:53:12 PM
Subject: Re: REFLECTOR: 12 Volt .vs. 24 Volt

Actually in my opinion a 12 v system is much less expensive with minimal
weight gain. As far as circuit breakers, on A/C Spruce's site, the
difference between a 10 amp and 20 amp breaker is between zero and 2
dollars. But check out the difference between a 12v and 24 v battery. It is
double. You could use 2 12 v batteries in series, but that would more then
offset your weight savings from smaller wire. Your options for numerous
components are limited with 24 v systems, primarily aircraft only, no
automotive components could be used anywhere unless you reduced the voltage.
I'm a working A&P and realize there are some advantages with a 24 v system,
but unless it's a large aircraft like an airliner, the savings in weight are
minimal. Very few of the homebuilt aircraft I have seen use a 24 v system.
Maybe there are more 24 v converts out there, but I can't imagine any real
savings from 24 volts. Just my 2 cents
----- Original Message ----- 
From: "Brooke Wolf" <bwolf1 at tds.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Sunday, May 17, 2009 3:31 PM
Subject: REFLECTOR: 12 Volt .vs. 24 Volt


> All
>
> Almost every time I start a new phase in the building process of my
> XLRG-5, I am a bit slowed because I have not decided on an electrical
> system. I would be interested in hearing the opinions of the collective
> as to any advantage of a 24 volt system. It would save some weight with
> smaller gauge wire, but I think the weight savings in negligible. Other
> than that, I can't think of an advantage. One major sticking point in
> the decision making process is Cessna, Cirrus, and others. Are they
> putting 28 volt systems in their new airplanes? If so, one would assume
> there are good reasons for doing so. Does any one know what those good
> reasons might be? I've got to get off this fence and get on with my
> project!!
>
> BTW I plan on a robust electrical system (probably 2 alternators, 1
> battery) to support a fairly sophisticated IFR panel with sufficient
> redundancy for serious weather flying.
>
> Thanks.....Brooke _______________________________________________
> To change your email address, visit
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>

_______________________________________________
To change your email address, visit 
http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery! www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose
Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html


_______________________________________________
To change your email address, visit 
http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!  www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose
Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html