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Date: Thu, 04 Nov 2004 19:53:11 -0500
Subject: FW: Error in presentation calculations
From: Bulent Aliev <atlasyts@bellsouth.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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-- 

Bulent Aliev
Enginegear

> 
> Bill Schertz,
> 
> I'm very interested in this as I'm looking for a suitable remote mounted
> water pump.
> You have done a splendid job on this in educating the non-engineer.
> I've done a couple of quick calculations to see it the outcome for different
> HP is relative, and it is.
> 
> What is not clear to me is that  the dT of 10 degrees gives an outcome of 35
> gal/ min (i.e. 349/10) but for the 50 degrees difference we expecting to
> see, the 349/50 isn't appropriate and I'm guessing you mean - divide by ten
> and them multiply by 5, or 5/10, or 1/2.
> 
> So one of my questions is, do we see the Mazda  water pump delivering these
> outcomes of 175 gal/min for 100 hp, 265 gal/min for 150hp and 350 gal/min
> for 200hp?
> Is my thinking on this correct; as it just seems like a lot of coolant to
> pump.
> George ( down under)

Hang on George there is a lot more on this as soon as Bill sends me the
complete pdf on the whole paper. The stock water pump pumps up to 50 gal per
minute
as I recall and consumes 3 HP. If you are thinking of an electric pump
that would be 172 amps at 13 volts at 100% efficiency. If the electric motor
was 80% efficient that would be 215 amps!

Paul Lamar
 
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