Mailing List flyrotary@lancaironline.net Message #24601
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: NPG + use in aircraft??
Date: Mon, 27 Jun 2005 16:49:48 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Rusty; can you quantify this statement: 
 
 How much more does it cost? 
 
Over here, it's about $20/gallon plus shipping, which is considerably more than normal antifreeze, and waaaaay more than distilled water.  For cost estimates, you'd be better off to look this up from a local supplier, or contact Evan's about price and shipping down under.    

What percentage poorer, is it in heat removal efficiency

There was some percentage given for heat transfer compared to water, but I don't recall what it was.  Evan's claims that the lack of hot spot boiling will actually make Evan's more efficient than it would otherwise seem.  Basically, you won't know until you try, and even then, you may not know.  
 
Dave and I both installed it at the same time we made significant changes to the cooling system, so neither of us can say exactly what effect it had.  Hopefully, someone will install it without changing anything else, and let us know.   
 
Cheers,
Rusty
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