Mailing List flyrotary@lancaironline.net Message #19189
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: BMW and EWP
Date: Mon, 21 Mar 2005 12:16:53 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message

So, the question becomes, what approach cools the metal engine parts best, high or low flow?  Methinks high works best. 

Mark S.

Hi Mark,
 
I haven't heard a single person disagree with this.  The real question is how much flow do we need? 
 
Clearly, a single Davies Craig pump will cool a turbo 13B, or a race engine, so hyper-flow isn't "needed"  for cooling.  Perhaps in time this will negatively affect the housings, but only time (lots of it) will tell.  
 
FWIW, running the stock system isn't a guarantee that you'll never have these problems either, because we aren't running the engine the way Mazda intended.   Heck, for all we know, Mazda had to move the liquid fast enough to keep plain water from boiling, since they know that some people will put that in the engine.  Remember how they decided to use sump oil for the apex seals?  Purely a concession to marketing, and not in the engine's best interest. 
 
EWP's aren't for everyone, at least until the rest of the automaker get on board with it :-)  They solve installation problems for some folks, provide a proven backup system, and have some other (apparently) debatable advantages.  Still a free country.
 
Cheers,
Rusty (Dave, can you prescribe something for Leon's headache)   



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