It's interesting to note that the 88 liters per minute figure that is the
maximum spec for the Davies Craig pump works out to 23.2 gals per minute.

Barry Gardner
Wheaton, IL
----- Original Message -----
From: "Bill Schertz" <wschertz@ispwest.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, October 09, 2003 2:04 PM
Subject: [FlyRotary] Re: EWP - Success at last?


Ed's spread sheet is the basis for the following note and attached pdf file.

At 5600 rpm, he shows 3901 Btu/min being rejected from the Radiators.

Using 50-50 EthyleneGlycol-water, I have calculated the flow rate of water
through the radiators required to remove this much heat, as a function of
the temperature drop across the radiator (which is the temperature rise
across the engine).

You can see that for a reasonable delta-T you would like to have ~20GPM from
the pump.

I would be very interested in the actual delta-T that Ed gets on his
engine/radiators.

Bill Schertz





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