[NSRCA-discussion] lipo flight pack question

[Courtney, Gary Ray]

Is the replacement cost of a new reciever pack worth your aircraft? no  
 
trash it and buy a new one
 
gary
 
 
 

________________________________

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Eddie
Batchelor
Sent: Wednesday, November 21, 2007 12:33 PM
To: 'NSRCA Mailing List'
Subject: [NSRCA-discussion] lipo flight pack question



OK all you E guru's. Please help me out here.

I inadvertently left my switch on after flying last weekend. The flight
pack with a 2s lipo and regulator sat on for 9 days and drained the
lipo. When I checked the voltage on the 2s 850mah lipo it read under 2.6
volts and dropping under load. Without the load it rose to just above 3
volts. SO obviously I drained my 7.4v 2s pack quite dead/flat/ ka-put.
:-(

 

I tried to recharge it and none of the lipo chargers I have would even
allow it to begin charging. Then thinking I had nothing to loose at this
point I put it on my nicad charger for a few moments and got the voltage
up some. ( Yes I know this normally is a NO-NO and I did it very
cautiously, outside.) 

Then the Accucyle Elite accepted it as a 2s pack and began charging. I
eventually charged back over 900 mah into this pack rated as 850mah.

 

I have not had time to cycle it yet but I will to see what capacity It
can output & recharge.

 

NOW , my question to the collective wisdom is.  Assuming the pack cycles
within acceptable output IE (800mah or more), Do you think the pack is
useable or should I just trash it. How much damage could have been done
by slowly draining  the pack flat. I think it wouldn't be as severe as
draining a pack flat under load( in flight).

 

I doubt I could ever feel comfortable flying my pattern plane with it,
but would it be usable for sport flying.

 

Just curious

 

Thanks

Eddie B

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