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Date: Tue, 19 Oct 2004 17:08:32 -0400
From: echristley@nc.rr.com
Subject: Re: [FlyRotary] Re: EWP
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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----- Original Message -----
From: Dale Rogers <rogersda@cox.net>
Date: Tuesday, October 19, 2004 12:24 pm
Subject: [FlyRotary] Re: EWP

>   Not using the controller, leaves three basic
options: 
> (A) wire direct, pumping full flow all the time
and using 
>    a thermostat to maintain minimum heat.
> (B) wire direct, with no thermostat, and run cold
during 
>    decents and other low-load conditions.
> (C) Put in a manual speed control.
> 
> Rusty's concern - inadequate "minimum" flow speed
- can 
> be dealt with fairly easily.
> 


There is an option (D).  

Run two EWPs.  The first wired direct.  The second
wired to the thermostat.  Y'ed off of and into the
engine, such that each feeds a seperate AC core. 
Summit racing has some smaller pumps with 3/4"
fittings.  I'd feed these two into a 1" common hose.
Redundancy and smaller current draw except when
absolutely necessary (the smaller pump only pulls
5amps).

The technical problem I haven't figured out, when it
gets cold how do I keep the unused radiator from
freezing solid when it has zero flow.