[NSRCA-discussion] NiMH Question

[Bill Glaze]

Dean:
A while back, when I was living in Las Vegas and Greensboro, I made a quick trip to Vegas, got in late, and charged, my Extra 300 which had a Futaba radio.  Took the airplane off charge after an all night charge, went out to fly early the next morning. Put the plane in the air and everything was normal except that it seemed slow on ailerons; not much, just a little.  Flew it twice, finally checked the battery, and found a dead cell.  Range was fine, everything was good, except the ailerons were just a tad slow.  As an old-time friend used to put it, "God just gave you your airplane back."  Amen!
Bill Glaze
  ----- Original Message ----- 
  From: Dean Pappas 
  To: NSRCA Mailing List 
  Sent: Friday, February 24, 2006 11:47 AM
  Subject: Re: [NSRCA-discussion] NiMH Question


  Hey Bob,
  Remember the old Orbit ads with the picture of someone flying his plane and then showing the battery with one "cutaway" cell?



  Dean Pappas 
  Sr. Design Engineer 
  Kodeos Communications 
  111 Corporate Blvd. 
  South Plainfield, N.J. 07080 
  (908) 222-7817 phone 
  (908) 222-2392 fax 
  d.pappas at kodeos.com 

    -----Original Message-----
    From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Bob Richards
    Sent: Friday, February 24, 2006 11:38 AM
    To: NSRCA Mailing List
    Subject: Re: [NSRCA-discussion] NiMH Question


    >>>NiCad's normally fail shorted and you have enough power to land. NiMh's normally fail open and you will need another airplane to go with your new battery.<<<

    Some of the old radios (Proline, for instance) had diodes across each cell in the airborne pack, in case a cell went open. Also, if a cell died (lost voltage) it would minimize the problem by preventing a cell from reverse charging.


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


  _______________________________________________
  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/20060224/4d51ffc5/attachment-0001.html