X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.202] verified) by logan.com (CommuniGate Pro SMTP 5.0.7) with ESMTP id 964600 for flyrotary@lancaironline.net; Thu, 02 Feb 2006 02:02:48 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.202; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id 69so343820wra for ; Wed, 01 Feb 2006 23:02:03 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:x-priority:x-msmail-priority:x-mailer:importance:in-reply-to:x-mimeole; b=eo/+rDZphh08XPsO8gvQfDvEyBsnQDksqddJ8PsPvXYc9OwWqRaj1hkNaoQWd9t5LjRDUs2QmwrqDLXaeRvYu9i5cgEZ3sWnBlsA1GzRkXIrAMRgy4toce8VoxBO5FQL9lJ+VCj0gK8QcYmoOZK4pEmoJSNdbzAtr7TNNTEokME= Received: by 10.54.110.15 with SMTP id i15mr641781wrc; Wed, 01 Feb 2006 23:02:02 -0800 (PST) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 24sm3061263wrl.2006.02.01.23.02.02; Wed, 01 Feb 2006 23:02:02 -0800 (PST) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Suitability of NPG for Rotary Engine use Date: Thu, 2 Feb 2006 01:02:02 -0600 Message-ID: <000001c627c6$91cb8580$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C62794.47311580" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C62794.47311580 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable In spite of Dave's experience, I really find that higher boiling point = real attractive. I try to encourage guys flying unknown cooling systems to = take advantage of the safety margin you get from boiling point. Even though I don't use Evans myself. I consider boil over the number one coolant = risk item. =20 Do you guys have anyone flying with evans?=20 =20 My old RV-3 was flying quite successfully with Evan's "NPG-R". I = presume it still is. The system was set up for zero pressure, which eliminates = other problems as well. Lots of RX-7 guys run NPG in their stock engines = also. So far, I haven't heard of anyone having a problem running it. =20 =20 This whole discussion reminds me a lot of the story of scientists who = proved on paper that a bumblebee can't fly :-) NPG isn't for everyone, but it = has lots of advantages if your system can take advantage of them. The = primary disadvantage has been mentioned, and that's availability away from home. = =20 =20 Near comatose, must sleep.... Rusty (hoping the MRI scanner from hell is still working in the morning) =20 =20 ------=_NextPart_000_0001_01C62794.47311580 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
In spite of Dave's experience, I really find that higher boiling = point real=20 attractive. I try to encourage guys flying unknown cooling systems to = take=20 advantage of the safety margin you get from boiling point. Even though I = don't use Evans myself.  I consider boil over the number one = coolant=20 risk item.
 
Do you guys have anyone flying with evans? 
 
My old RV-3=20 was flying quite successfully with Evan's "NPG-R".  I presume = it still=20 is.  The system was set up for zero pressure, which eliminates = other=20 problems as well.  Lots of RX-7 guys run NPG in = their stock=20 engines also.  So far, I haven't heard of anyone having a problem = running=20 it.  
 
This whole=20 discussion reminds me a lot of the story of scientists who = proved on=20 paper that a bumblebee can't fly :-)  NPG isn't for everyone, = but it=20 has lots of advantages if your system can take advantage of = them.  The=20 primary disadvantage has been mentioned, and that's availability away = from=20 home. 
 
Near=20 comatose, must sleep....
Rusty (hoping=20 the MRI scanner from hell is still working in the=20 morning)
 
 
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