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Date: Fri, 1 Apr 2005 12:53:29 -0700
From: Bob White <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Davies-Craig EWP Test Results
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Hi Randy,

I agree with you.  This was a preliminary test to compare the performance of
the pumps.  I did an on engine test of the WP136 pumps, and with two in
parallel, I got 11 GPM flow.  Even better is to generate the flow vs pressure
charts.  Then plotting them with the flow vs pressure curves of the cooling
system you can see the operating point with various conditions.  See Bill
Shertz plot of the Mazda WP and core flow vs pressure charts as a good
example.  http://www.rotarywiki.org/wiki/show_image.php?id=1

The on engine test of the WP337 is comming.  Maybe the flow vs pressure data at
some point.

Bob W.


On Fri, 1 Apr 2005 14:23:27 -0500
randy echtinaw <rjechtinaw@ia4u.net> wrote:

> Gentlemen,
>        I will try to phrase this question so as not to reveal my 
> stupidity but - if you are going to test EWP's and EDWP's for pressure, 
> volume and amp draw comparisons why not set them up with an engine 
> block and a couple of radiators and get some real factual data from  
> these comparisons. I am failing to see what the value of the tests are 
> when pumping from a barrel of water to another barrel. The very best 
> test would be to use a running engine installed on an aircraft and keep 
> changing the pumps and recording the data. There must be someone out 
> there with nothing else to do :)
> Thank you,
> Randy
> 

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