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Date: Mon, 28 Feb 2005 17:24:17 -0500
From: Ernest Christley <echristl@cisco.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: [FlyRotary]actual water flow   was   Belt rumnations;
 soliciting Opinions of racers please....
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Russell Duffy wrote:

> As I type, I'm also looking for a suitable flow meter, and I'm open 
> for suggestions.  The plan will be to rig this into my system, and 
> find out once and for all what sort of flow I've got with both the 
> mechanical, and EWP.   I doubt there's any way to have this in place 
> during flight, so Ernest will say it's not valid :-) 
>
No I won't!  Just to be disagreable 8*)

The water flow system is closed loop and doesn't know whether you're in 
the air or not.  Once the coolant is warmed to operating temperature, 
the flow provided by the pump will not change as long as you spin it at 
the same RPM.  A ground test is perfectly valid for coolant flows.

If you have a head pressure generated by the pump and the voltage across 
the terminals while it is generating that pressure, then I can tell you 
what your flow rate is.  In fact, here is a link to the chart so that 
you can get the flow rate for yourself:

http://ernest.isa-geek.org/Delta/Library/ewpv.xls