[NSRCA-discussion] LiPO Receiver packs

[Fred Huber]

double paks and regulators is fine... but the added reliability can lead to added complacancy about checking the LiPos before each flight.

#1 source of reliability is proper pre-flight.
  ----- Original Message ----- 
  From: Dave Lockhart 
  To: 'NSRCA Mailing List' 
  Sent: Wednesday, January 03, 2007 9:22 PM
  Subject: Re: [NSRCA-discussion] LiPO Receiver packs


  Colin,

   

  Any non-redundant component that fails can kill the plane.

   

  A very simple way to avoid single components in the power system is to double them -

   

  TP2s1p480 #1 into Vreg#1 into RX battery port

  TP2s1p480 #2 into Vreg#2 into RX spare channel port.

   

  With the Tech Aero Vregs I'm using, the total weight is only 3 oz.  I am not using switches, as the plane is electric and I am "under the hood" each flight anyway.  If you want to use a switch, just use 2.

   

  You can pretty effectively monitor lipo health with a voltmeter with a switchable load.  Check the voltage after each flight, and you'll probably see a fairly consistent drop in resting voltage after each flight.  Apply the load and you should see a fairly consistent drop in voltage.  When the lipos get old, the voltage drop per flight will increase, and the amount of voltage drop under load will also increase.

   

  Regards,


  Dave

   


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  From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of colin chariandy
  Sent: Wednesday, January 03, 2007 10:06 PM
  To: NSRCA Mailing List
  Subject: Re: [NSRCA-discussion] LiPO Receiver packs

   

  Thanks Jason. 

   

  What about reliablity? How do these batteries fail? Is it detectable before it's too late?

   

  Is there a not too expensive charger ( not the 10101) that can be used to minitor the LiPO condition?

   

  I have been using SR batteries forever and I have learned how these batteries fail. As a result it's easy to avoid the failure in the air. How do you plan to ensure that the LiPOs don't fail in the plane?

   

  Colin.

  JShulman <jshulman at cfl.rr.com> wrote:

    With my new Integral with the OS-200/YS-160, I am running a TP-910 2-cell lipo with a Shulman Aviation 6V regulator. After 3 flights, I put in 380 mah's. I would imagine on a 2C it might be a bit better.

     

    Regards,
    Jason
    www.jasonshulman.com
    www.shulmanaviation.com
    www.composite-arf.com 

      -----Original Message-----
      From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of colin chariandy
      Sent: Wednesday, January 03, 2007 9:51 PM
      To: NSRCA Mailing List
      Subject: [NSRCA-discussion] LiPO Reciever packs

      Hi all

       

      Just trying to get some background on the use of LiPOs for reciever packs.

       

      What are you guys using...2 cell, 3 cells?

       

      Which regulators do you recommend? 

       

      How do you monitor performance? 

       

      How reliable are they in a 2C airplane?

       

      Appreciate any advice.

       

      Thanks

      Colin.

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