[NSRCA-discussion] E-power

[Fred Huber]

NEVER use a partially charged LiPo with a Jeti or Dynam ESC.  They detect the VOLTAGE when you plug the battery in (durring those 5 beeps) and the LVC is based on a percentage of that. (with NO preprogramed relationship to a cell count)

Hopefully you'd notice a loss of performance before you damaged the packs, but the LVC won't protect the LiPos if you start with partially depleted batteries.

If you aren't sure if the pack is full... get the voltmeter.

Castle Creations you set the LVC voltage when programming (at least the ones I have).... other ESC's differ.
  ----- Original Message ----- 
  From: AtwoodDon at aol.com 
  To: nsrca-discussion at lists.nsrca.org 
  Sent: Tuesday, April 17, 2007 10:40 PM
  Subject: Re: [NSRCA-discussion] E-power


  One thing I have begun doing is checking pack voltage before I fly, verifying full charge condition. 

  Having multiple battery sets, I may have gotten confused once (I will deny it in public tho) and took off with a partially discharged pack, couldn't figure out why I lost power and had to land about half way thru a flight.......  Whoops....  If I had actually done that, I guesstimate I would have put back about 5200+ mah into a TP5300, not that I would have actually done that ever  

  Good news is, the pack seems fine, has over 70 cycles on it now and still going strong (when I charge it)

  Don

  In a message dated 4/17/2007 8:31:21 P.M. Pacific Daylight Time, robcase1 at cox.net writes:
    Thanks for all the inputs.  The second pac only took 2500 Mah, so may'be the 
    batteries just need more time to be formed.  I will continue to make short 
    4 - 5 minute flight for the next 6 flights to hopefully form the cells 
    better.  I feel better about it tonight after putting back 2300 and 2500 
    respectively, back into each pack :)
    ----- Original Message ----- 
    From: "Steven Maxwell" <patternrules at earthlink.net>
    To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
    Sent: Tuesday, April 17, 2007 9:11 PM
    Subject: Re: [NSRCA-discussion] E-power


    > Do 5 or 6 short flights to form the new batteries.  Don't get me wrong
    > here but for just starting out your pushing the limits but your last post
    > looks fine 3000's should be good. By pushing I mean for an E newbie, not
    > like I have this figured out, my wrost enemy is flying to far out I got 
    > out
    > to 225 or more with a wind to my back and put back in 2579 MAh
    > One of the big things I found with the 5330/F3A is it's real easy to use
    > more amps than you need, what I found was after a point there is no more
    > power just higher amps not sure why other than maybe the AXI is like a
    > torque curve, for lack of a better term, maybe the AXI peaks at say 68 
    > amps
    > maybe less maybe more, but the thing is if your running more than that,
    > whatever that number is you just pushing more amps.
    >
    > Steven Maxwell
    >
    >
    >
    >
    >> [Original Message]
    >> From: Robert & Casey Green <robcase1 at cox.net>
    >> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
    >> Date: 4/17/2007 10:27:49 PM
    >> Subject: Re: [NSRCA-discussion] E-power
    >>
    >> How many flights, should you put a new pack through to break them in?  I
    >> charged the first pack that I flew tonight and put back 2300 Mah, the
    > second
    >> pack looks like it will take 3000 to be replenished, which is about the
    > 80%
    >> of the pack.  After putting that much back in the pack earlier I am going
    > to
    >> have to throw these packs away as no good, or do I keep flying them and
    > see
    >> what happens?
    >> Thanks for your responses so far.  I think that I may have enough room
    > 10S
    >> 5000 extreme.  I am about three ounces over, sure I can find a way to
    > make
    >> it work for the NATS.
    >> ----- Original Message ----- 
    >> From: "Duane Beck" <duane.e.beck at comcast.net>
    >> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
    >> Sent: Tuesday, April 17, 2007 8:06 PM
    >> Subject: Re: [NSRCA-discussion] E-power
    >>
    >>
    >> > Robert & Casey Green wrote:
    >> >> Don I was pulling 72 Amps, on a 20x13 prop.
    >> >
    >> > Is that peak static, or unloaded in the air?  I assume those are 20C
    >> > packs.
    >> > _______________________________________________
    >> > 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
    > 


    _______________________________________________
    NSRCA-discussion mailing list
    NSRCA-discussion at lists.nsrca.org
    http://lists.nsrca.org/mailman/listinfo/nsrca-discussion







------------------------------------------------------------------------------
  See what's free at AOL.com. 


------------------------------------------------------------------------------


  _______________________________________________
  NSRCA-discussion mailing list
  NSRCA-discussion at lists.nsrca.org
  http://lists.nsrca.org/mailman/listinfo/nsrca-discussion


------------------------------------------------------------------------------


  No virus found in this incoming message.
  Checked by AVG Free Edition.
  Version: 7.5.446 / Virus Database: 269.5.1/764 - Release Date: 4/17/2007 4:43 AM
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20070418/61821f30/attachment-0001.html