Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Mon, 19 May 2003 10:22:41 -0400 Message-ID: X-Original-Return-Path: <13brv3@mchsi.com> Received: from sccmmhc02.mchsi.com ([204.127.203.184] verified) by logan.com (CommuniGate Pro SMTP 4.1b6) with ESMTP id 2353389 for flyrotary@lancaironline.net; Sun, 18 May 2003 10:24:46 -0400 Received: from rad (12-218-74-116.client.mchsi.com[12.218.74.116]) by sccmmhc02.mchsi.com (sccmmhc02) with SMTP id <20030518142445mm200euij9e>; Sun, 18 May 2003 14:24:45 +0000 Reply-To: <13brv3@mchsi.com> From: <13brv3@mchsi.com> X-Original-To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: coolant / thermostat X-Original-Date: Sun, 18 May 2003 09:24:46 -0500 X-Original-Message-ID: <000001c31d49$3be5f450$0201a8c0@rad> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 For those of you not also participating on the "other" list; attached is the flow data measured during my 20B dyno run with (full open) and without the thermostat. Considerably higher flow without. Higher flow =3D better cooling. =20 Al ---------------- Thanks for passing that along Al. BTW, nice looking numbers on the 20B. Thanks also to Bill for passing along your experiences. I'll be = interested to hear if the temps go back down without the thermostat. =20 I took another look at the hole that needs to be plugged, and it looks pretty easy to tap, especially now that everything is open, and dry. = I'm now thinking that I'll try the engine first without the thermostat, = since my first runs are going to be on the ground, where cooling will be marginal anyway. If all goes well with the ground runs, I'll make the first = flights without the thermostat as well, and hope for the best. Again, I'm = trying to avoid overheating on that first climbout, when the workload will be = pretty high already. =20 I was reading some of the RX-7 Club archives, and it just amazes me to = keep reading the same old shop myths. A classic is the one that says the = water will be moving too quickly to pick up any heat, so your car will = overheat without a thermostat. We know better of course. =20 Besides temp control, the other useful feature of the thermostat is to = build additional pressure in the block to raise the boiling point. In our = case, we're running much higher pressure caps than the street engine, so we = make up for some of that. =20 Rusty