[NSRCA-discussion] electric brain fart have a nice chuckle

Tue Jun 13 04:20:43 AKDT 2006

 I've done 3C on 2100's after the first 5 or 6 1c forming charges and there
still in perfect condition after 40 cycles. 
 Got you Chad using 10s wired straight up is a weight savings for sure of
over an oz.
 All this maybe just my excitment of the electric pattern, it's got me to
practice more.
 I'm not really thinking outside the box here just throwing more thought
into the process.
 Trying to give anyone interested the idea that you don't need $3000 worth
of batteries to enjoy this side of the hobby.
 The biggest killer of electric is heat and overdischarge, and of course
charging at wrong cell count.

Steven Maxwell

> [Original Message]
> From: Chad Northeast <chad at f3acanada.org>
> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> Date: 6/13/2006 1:37:18 AM
> Subject: Re: [NSRCA-discussion] electric brain fart have a nice chuckle
>
> I didnt mean to imply that you cant 2 or 3C charge, I have been doing it 
> on 3s 2100's from charge #1 (mostly 2C rate) :)  Definately fast!  I am 
> just not convinced yet that there is no damage to the packs from doing 
> it!  I only have 15 cycles on them though so it will be a while yet 
> before I know.  I am now comfortable in leaving the packs over the 
> winter, which in our climate is an important piece of info as most will 
> be forced into that situation :)  Those of you in the south are lucky! :)
>
> I have my packs all wired up permanently as 10s packs, so >1C charging 
> is not an option unless I rewire the packs.  At a contest I agree you 
> dont need that many packs to get through the rounds easily...provided 
> you remember to charge them lol.  For me I really hate charging at the 
> field, and often I dont have time to do it anyways....so I went the lots 
> of packs route.  Hopefully they hold up well over time.
>
> Chad
>
> Steven Maxwell wrote:
>
> >  Good points Chad, my point was more of monetary of startup cost for 
> > some that feel it's just to expensive, money that could spent on 
> > generators or family. The newest Safety Instructions from Thunder 
> > Power states that "3c charging can be done on only prolite 
> > 910,1320,2000,and 2100 using only the TP 1010 charger in conjunction 
> > with TP balancer" as you know that the 5300 is made up of 4 1320's.
> >  I know of one person that is charging at1.5C without any problems.
> > * I'm in no way suggesting that everyone try this, *only people with 
> > experience, knowledge, and good safety practices try this. Also in the 
> > hope that this will spark someone to get some real data.
> >  Today with 2 packs and only one charger I flew as much as I wanted in 
> > fact my biggest thing was waiting for the motor to cool to ambient 
> > before I could fly again.
> >  I'm not a chemical engineer so I'm not sure how all this plays out 
> > discharge at 35-65 amps and can only charge at 5 amps just don't make 
> > sense to me, the future will tell how all this plays out.
> >  Everyone please be careful when doing anything out of the ordinary 
> > and never charge at wrong volts (cell count).
> >  Thanks for your reply Chad I was hoping to get many involved in this 
> > discussion with as much experience as you.
> >
> > Steven Maxwell
> >  
> >  
> >
> >
> > > [Original Message]
> > > From: Chad Northeast <chad at f3acanada.org>
> > > To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> > > Date: 6/12/2006 11:12:52 PM
> > > Subject: Re: [NSRCA-discussion] electric brain fart have a nice
chuckle
> > >
> > > Regarding shelf life...
> > >
> > > I just got a couple of new sets of 5300's....and compared them to my
> > > packs from last year with the micro logger (in flight data)....the 
> > packs
> > > sat around all winter with basically no use, and very little control
of
> > > storage voltage.
> > >
> > > The old packs perform identical to the new ones, in air performance is
> > > not different enough tell them apart really.  The packs that sat over
> > > winter did take a few cycles to get back up to par! though.
> > >
> > > Soooo....I dont think packs sitting for a winter is all that bad for
> > > them.  It can probably be argued that 2C charging is more harmful to 
> > the
> > > lifespan than sitting on the shelf is....but there is not enough
> > > information to form that as a factual conclusion :)
> > >
> > >
> > >
> > > Steven Maxwell wrote:
> > >
> > > >  I have about 38 flight on the new electric Smaracea (smaragd wings
> > > > and stab and Panacea fuse) Hacker C50-14XL, Jeti 90 controller, TP 
> > 10s
> > > > 5300, made my third flight today in about 13 MPH winds for some 
> > reason
> > > > I felt I was losing power starting at the 1/2 hourglass ( P-07) so
on
> > > > landing ran the throttle trim back to center to stop motor as usual
> > > > and for some reason I went up front to spin the prop man it's tight,
> > > > just regreased with new grease 6 flights ago, dejected to say the
> > > > least that ! something was wrong, carried it back to the flight 
> > stands
> > > > ; unplugged big batteries and receiver battery, went back up front
to
> > > > spin the prop again, smooth as silk, well crap whats this, Denny my
> > > > flying buddy said could it be programming, Duh we have brake active,
> > > > plugged everything back in included watt'sup meter and ran throttle
> > > > trim up took meter reading and 65.75 amps same as new, brought trim
> > > > back to center and yes the motor was tight again, the brake works 
> > well
> > > > LOL, hope youal! l get a good laugh out of this we did.
> > > >  As  side note I'm convinced that if you at contest that fly's every
> > > > class one round at a time you can get by with one set of batteries 
> > for
> > > > pattern, this has to be done with 2 chargers capable 10 amps and
cell
> > > > balancing, charging at 2c, charging in less that 30 minutes, no cool
> > > > down after flight *(if batteries are not really hot under say 140
> > > &g! t; degrees F and never fly more than one pattern (P-07)* I've 
> > tested this
> > > > and works well, so the expense is much lower than expected, chargers
> > > > are cheaper than batteries, this will also do other things like 
> > better
> > > > shelf life for batteries, it's been my felling that having to many
> > > > packs that you can't get enough flights for many years to get full
> > > > value out of batteries. Using just one set a year will bring cost 
> > down
> > > > to less than buying fuel for most people, I would love to prove this
> > > > but we fly back to back rounds at our contest so I have to have 2
> > > > packs. Would love to hear others comments.
> > > > 
> > > > Steven Maxwell
> > > > 
> > > >
> > > 
> >
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