Mailing List flyrotary@lancaironline.net Message #18326
From: Tracy Crook <lors01@msn.com>
Subject: Re: [FlyRotary] Re: EWP Test Results/DRAG
Date: Thu, 3 Mar 2005 18:18:43 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Ernest,
I had no idea that water viscosity changed that much with temperature.  Is the same true of 50 - 50 glycol & water?
 
Tracy

        Then:

v = pir ^4 p/8cl

*Viscosity of Water as a Function of Temperature*
Temperature
/°C Viscosity
/cP
20 1.002
40 0.653
60 0.467
80 0.355
100 0.282


Pump A Only:
14.0 V   8.4 A   6      GPM  56 F

56F => 14C
180F => 82C

My reasoning:
All other factor being equal, cutting the viscosity to 1/3 will triple
the flow.  If the WP136 flows 6GPM at 56F, it can be expected to flow
18GPM at 180F, closer to 20GPM at 190F.

Ernest (also a true believer, but so were all those people at Jonestown)
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