X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wproxy.gmail.com ([64.233.184.205] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 971237 for flyrotary@lancaironline.net; Sun, 05 Feb 2006 17:41:11 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.233.184.205; envelope-from=russell.duffy@gmail.com Received: by wproxy.gmail.com with SMTP id 69so912535wra for ; Sun, 05 Feb 2006 14:40:26 -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:x-mimeole:in-reply-to; b=dAjclXOlIzW8wk87QiMrVZzJynn7vbhLFTPm+XrRbZLNVx/3U/4WU/fILCBxlabl6X6RGMELhkxt41tvUwu8TxFE3QVB7J1+rxn3MCDbqgscaTNWuK83ewUz5ccXUCog1oTBLwikpHQIRbIOjMLZtoFIv5HSsSxz4nZorV5wCDM= Received: by 10.54.152.14 with SMTP id z14mr1511039wrd; Sun, 05 Feb 2006 14:40:26 -0800 (PST) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 24sm4744977wrl.2006.02.05.14.40.25; Sun, 05 Feb 2006 14:40:25 -0800 (PST) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: NPG Coolant Temperature vs 50/50 Date: Sun, 5 Feb 2006 16:40:25 -0600 Message-ID: <005f01c62aa5$288b5c30$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0060_01C62A72.DDF0EC30" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2670 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0060_01C62A72.DDF0EC30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I suspect that you are correct, Al. The operating temperatures = recommended my Mazda long ago are undoubtedly conservative especially with regard to = the capability of various "O" rings to withstand the heat. =20 =20 From what I understand, the oil temp limit of 210 F into the engine is = there to protect the rotor bearings, which is supposed to be the first thing = to go at higher temps. =20 I've never heard of 180 F as a water temp limit, other than the fact = that the stock thermostat is 180 for most models. I can't recall what the thermostat was on the FD, but I practically defy anyone to get an FD to = run under 200. I don't think the radiator fans even bother to come on until = 205 F or so. Can't quite recall. =20 Now Lynn and the racing boys have said that best power comes (from = memory) with water under 180 F, and oil under 160 F. These might make good = targets for cruise, but I don't think too many people are going to have the = cooling capacity to see these in max climb mode. =20 =20 Cheers, Rusty (just full of opinions today) =20 ------=_NextPart_000_0060_01C62A72.DDF0EC30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
I suspect that you are correct, = Al.  The=20 operating temperatures recommended my Mazda long ago are undoubtedly=20 conservative especially with regard to the capability of various "O" = rings to=20 withstand the heat.  
 
From what I understand, the oil temp limit of 210 F = into=20 the engine is there to protect the rotor bearings, which is = supposed to be=20 the first thing to go at higher temps.
 
I've never heard of 180 F as a water temp limit, other = than the=20 fact that the stock thermostat is 180 for most models.  I = can't recall=20 what the thermostat was on the FD, but I practically defy anyone to get = an=20 FD to run under 200.  I don't think the radiator fans even = bother to=20 come on until 205 F or so.  Can't quite=20 recall.
 
Now Lynn and the racing boys have said that best power = comes (from=20 memory) with water under 180 F, and oil under 160 F.  These might = make good=20 targets for cruise, but I don't think too many people are going = to have the=20 cooling capacity to see these in max climb=20 mode.  
 
Cheers,
Rusty (just full of opinions=20 today)    
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