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From: Dale Rogers <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: How long can you fly on your battery??
Date: Sun, 15 May 2005 19:36:22 -0400
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Drilled down one more level to:

http://www.batterymart.com/battery.mv?p=ODY-PC625

IIRC, there was a discussion on Odyssey Batteries on the 
COZY list < Cozy_builders@mailman.qth.net > in Jan-05,  
and someone had observed that the 625 offers real-world 
performance about as good as the 680 - at two pounds 
less weight.

Dale R.
(a bit groggy after being on-duty for 30 continuous hours.)


> 
> From: Dale Rogers <dale.r@cox.net>
> Date: 2005/05/15 Sun PM 07:14:11 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: How long can you fly on your battery??
> 
> There's also some info (& purchase) at:
> 
> http://www.batterymart.com/battery.mv?c=odyssey
> 
> Dale R.
>  
> > From: "Russell Duffy" <13brv3@bellsouth.net>
> > Date: 2005/05/15 Sun AM 10:53:36 EDT
> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> > Subject: [FlyRotary] Re: How long can you fly on your battery??
> > 
> > I was trying to find some info on the Odyssey batteries, and could only find
> > data for the PC680.   http://www.odysseybatteries.com/aircraft.htm
> > Fortunately, for me, that's what I have :-)
> >  
> > In the battery world, CX rating seems to mean Capacity when discharged fully
> > (10.5 V) in X hours.   I found some comments that said excess heat and
> > resistance reduces the efficiency as the current rises, which explains why
> > the amp hour rating his higher for a lower current draw.  The only specs
> > given for the PC680 are:
> > C1= 12.3 Ah     (12.3 amps for one hour)
> > C10= 16.0 Ah   (1.6 amps for 10 hours)
> >  
> > They also list "reserve capacity", which is a standardized rating for the
> > amount of time it takes to fully discharge a battery when drawing a 25 amps.
> > For the PC680, reserve capacity is 25 minutes.  This spec is given for all
> > the Odyssey batteries, and in fact, the PC625 is slightly higher at 27
> > minutes.  
> >  
> > Based on these figures, I should have 45 minutes of capacity easily, and
> > will plan to be on the ground somewhere in 20 minutes or less.
> >  
> > Cheers,
> > Rusty 
> >  
> >  
> >  
> >  
> > 
> > 
> 
> 
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>