[NSRCA-discussion] Electricity to the on-board radio system

[brett terry]

Looks good Eric!  I just worried when you mentioned using the smaller
packs.

On 2/13/06, Grow Pattern <pattern4u at comcast.net> wrote:
>
> Brett,
>          I have flown the CAP 232 already, thanks to some super January
> weather in NJ. I have a series of posts on RCU.
> http://www.rcuniverse.com/forum/m_3707956/mpage_1/key_/tm.htm
>
> I put meters between the battery and the servos. I never saw much over 500
> ma even when I loaded up multiple servos. The battery used up about 40% of
> its "safe" capacity in three flights. I'm looking at the 2100 mAh packs.
>
> I heat sink my regulators.
>
> Regards,
>
> Eric.
>
>
>
> ----- Original Message -----
> *From:* brett terry <brett.terry at gmail.com>
> *To:* NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> *Sent:* Monday, February 13, 2006 8:05 PM
> *Subject:* Re: [NSRCA-discussion] Electricity to the on-board radio system
>
> Eric,
>
> make sure the battery pack is up to the current consumption your servos
> will dish out!  If you figure each digital servo can draw more than 3A, that
> is 18A out of the pack.  This is only momentary, but some of these smaller
> packs can be damaged but the high current spikes.  Maybe you want to try a
> couple of the packs in parallel?
>
> Also, the Li-Poly packs are very vibration sensitive.  Make sure you
> shock-mount them!  And you probably don't want to use the MPI regulators
> unless you parallel them so they draw 3A max each, and have plenty of
> airflow.
>
> Good luck!  I want to hear how that Cap flies.  It looks very nice.  What
> motor are you using?
>
> Brett
>
> On 2/13/06, Grow Pattern < pattern4u at comcast.net> wrote:
> >
> > Triggered by the tease I wrote on the "Smoking li-Po" I remembered that
> > way back I photographed Jason's Impact at the beginning of the National's.
> > The FAI where he won.
> >
> > In his plane I saw a small (900 mAh) Li-Poly that he was using to work
> > the radio. I am/was not sure if the electric community were still doing
> > this, or if they had passed on the tip.
> >
> > I know that a separate battery has saved quite a few electric pattern
> > panes already. You tend not to hear about the catastrophic motor/Li-Po
> > failures from the sponsored guys. So for what it's worth here it is.
> >
> > Also, I am running one of these 2-cell 7.4V packs in a six digital servo
> > Great Planes 79" CAP 232. Still measuring the consumption.
> >
> > The pack weighs 1.33 oz BTW
> >
> > Regards,
> >
> > Eric.
> >
> > _______________________________________________
> > NSRCA-discussion mailing list
> > NSRCA-discussion at lists.nsrca.org
> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> >
> >
>  ------------------------------
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20060213/d4f739f9/attachment.html