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<br>
Use the ones with a failsafe switch. The Tech-aero regulators have
an adjustable output. The Jaccio ones available here do not appear
to be adjustable. It is nice to set the 2s lipo enough lower than
the main regulator that there is no drain on the backup. Jim's
suggestion of 6.3 and 6.0 volts is a good one. Then all you have to
do is check the reserve charge before each flying session. <br>
BTW, Keith Hoard and I have been flying this system since last
spring without any issues using Tech-Aero regulators.<br>
John<br>
<br>
On 1/23/2012 5:08 PM, Peter Vogel wrote:
<blockquote
cite="mid:CAGBB6kJi2jk17kyxRLaB9GuYMxoqh3==W2jsP3zRe81o7d6MLA@mail.gmail.com"
type="cite">I love this list, you learn something new everyday...
My thinking here was that since my RX has two battery leads, one
goes to a straight up 2S lipo, the other goes to the main 2S tap,
the voltage from the main should always be lower than the primary
RX battery so the RX will always use the primary unless something
bad happens at which point any power, even some rippling power
will be sufficient to bring the bird home safe.
<div>
<br>
</div>
<div>But, if that theory is wrong, what reg are folks using to get
HV (7.4v) power?</div>
<div><br>
</div>
<div>Peter+<br>
<br>
<div class="gmail_quote">On Mon, Jan 23, 2012 at 3:34 PM, Keith
Hoard <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:khoard@gmail.com">khoard@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF">
<div>Peter,</div>
<div><br>
</div>
<div> You will still want to use a regulator since the
ESC is causing the voltage to fluctuate (Castle calls it
"Voltage Ripple") while running. The regulator chops off
the voltage below where the volts are rippling. . . </div>
<div>.</div>
<div>And that's your technical 'esplanation of the day. <span
class="HOEnZb"><font color="#888888"><br>
<br>
<div><span>Keith Hoard</span></div>
<div>Collierville, TN</div>
</font></span></div>
<div>
<div class="h5">
<div><br>
On Jan 23, 2012, at 16:56, Peter Vogel <<a
moz-do-not-send="true"
href="mailto:vogel.peter@gmail.com"
target="_blank">vogel.peter@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>Ah. Now that's a good idea + point. And then,
in my case, where I'm running HV, I don't even
need a reg. That would provide true power
redundancy for almost no weight penalty, though it
does run the risk of yanking your RX out if your
main battery ejects, or, even if it doesn't yank
the Rx (which is held in by 6 servo leads after
all, it could yank the redundant battery lead
loose and the main system battery is of course
yanking itself, so you are left with no radio...
<div>
<br>
</div>
<div>Scott, how do you come up with 20g savings?
What size Rx battery are you running? My TP
1350's weigh 76g, even 900's are in the 60+g
range.<br>
<div><br>
</div>
<div>Peter+<br>
<br>
<div class="gmail_quote">
On Mon, Jan 23, 2012 at 2:51 PM, Keith Hoard
<span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:khoard@gmail.com"
target="_blank">khoard@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF">
<div>Only tap off two cells of your main
pack. You can then use a regular
regulator (as opposed to a non-regular
regulator). <span><font
color="#888888"><br>
<br>
<div><span>Keith Hoard</span></div>
<div>Collierville, TN</div>
</font></span></div>
<div>
<div>
<div><br>
On Jan 23, 2012, at 16:49, Peter
Vogel <<a
moz-do-not-send="true"
href="mailto:vogel.peter@gmail.com"
target="_blank">vogel.peter@gmail.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>And, of course, with a
non-switching BEC off a 10s or
even a 5s pack you would have
massive heat issues as it tries
to step down the voltage from
18.5 volts to 7.2 or 6 volts,
depending on whether you are
running an HV or standard
voltage setup, so the regulator
would probably need a fan or
heat sink of some sort, which
likely negates any weight
savings from not running with a
second battery.
<div>
<br>
</div>
<div>Peter+<br>
<br>
<div class="gmail_quote">On
Mon, Jan 23, 2012 at 2:30
PM, Scott McHarg <span
dir="ltr"><<a
moz-do-not-send="true"
href="mailto:scmcharg@gmail.com"
target="_blank">scmcharg@gmail.com</a>></span>
wrote:<br>
<blockquote
class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
You have to be careful
using the BEC, especially
from CC because it is a
switching regulator which
cannot be run in
parallel. It's really
best not to use the BEC
and set up a truly
separate system.<br>
<br>
Scott
<div>
<div><br>
<br>
<div
class="gmail_quote">On
Mon, Jan 23, 2012 at
4:28 PM, George
Kennie <span
dir="ltr"><<a
moz-do-not-send="true"
href="mailto:geobet4evr@gmail.com" target="_blank">geobet4evr@gmail.com</a>></span>
wrote:<br>
<blockquote
class="gmail_quote"
style="margin:0 0
0
.8ex;border-left:1px
#ccc
solid;padding-left:1ex">
<div>Could a CC
BEC also be used
instead of a
reg.? I don't
know how much
curent is passed
by a reg. </div>
<div>Sounds good
cause it's a
bummer trying to
solder an extra
lead to the
Deans.</div>
<div> </div>
<div>G.<br>
<br>
</div>
<div
class="gmail_quote">
<div>
<div>On Mon,
Jan 23, 2012
at 5:09 PM,
Scott McHarg <span
dir="ltr"><<a
moz-do-not-send="true" href="mailto:scmcharg@gmail.com" target="_blank">scmcharg@gmail.com</a>></span>
wrote:<br>
</div>
</div>
<blockquote
style="margin:0px
0px 0px
0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"
class="gmail_quote">
<div>
<div>
Guys,<br>
Chris Moon
just e-mailed
me about some
leads that
were done at
the factory.
These leads
run off your
balance leads
to a voltage
regulator and
allow your
main battery
pack to be
utilized as a
redundant
receiver
battery. It
is NOT meant
to be a
primary but it
will save 20+
grams if
you're running
2 rx
batteries.
You still have
to run the 2nd
regulator for
true
redundancy but
you eliminate
the 2nd
battery.
These leads
are factory
made and
eliminate the
need to make
them yourself
with the
concern about
plugging in to
the wrong
cell. I know
in my article,
I was pretty
much against
doing this as
a backup but,
with Chris
having this
made at the
factory, he
has all but
eliminated
making a
mistake by
tying to the
wrong cell. I
have the link
that I'll
e-mail you
off-list or
you can just
go to his
website. I
don't want to
break the
NSRCA list
rules by
advertising
for him even
though he
advertises
with the
NSRCA. The
leads are only
$3.99 each and
are found
under the
Connectors/Adapters
listing.<br>
<br>
Thank,<br>
Scott<span><font
color="#888888"><br clear="all">
<br>
-- <br>
<b
style="color:rgb(51,51,255)"><font
style="font-family:comic
sans
ms,sans-serif"
size="4">Scott
A. McHarg</font></b><br>
<br>
</font></span><br>
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<span><font
color="#888888">-- <br>
<b
style="color:rgb(51,51,255)"><font
style="font-family:comic
sans
ms,sans-serif"
size="4">Scott A.
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Flight Training</div>
<div>Santa Clara County Model
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