[NSRCA-discussion] LiPO Receiver packs

[Dave Lockhart]

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

 

  _____  

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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