Return-Path: Received: from seraph3.grc.nasa.gov ([128.156.10.12] verified) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 231610 for flyrotary@lancaironline.net; Wed, 30 Jun 2004 05:57:09 -0400 Received: from lombok-fi.grc.nasa.gov (lombok-fi.grc.nasa.gov [139.88.112.33]) by seraph3.grc.nasa.gov (Postfix) with ESMTP id 60BB16BA1A for ; Wed, 30 Jun 2004 05:56:40 -0400 (EDT) Received: from manihi.grc.nasa.gov (manihi.grc.nasa.gov [139.88.112.36]) by lombok-fi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id i5U9udIM024783 for ; Wed, 30 Jun 2004 05:56:39 -0400 (EDT) Received: from GR7700013583.lerc.nasa.gov (gr7700013583.grc.nasa.gov [139.88.139.62]) by manihi.grc.nasa.gov (NASA GRC TCPD 8.12.10/8.12.10) with ESMTP id i5U9ud8W001789; Wed, 30 Jun 2004 05:56:39 -0400 (EDT) X-Info: ODIN / NASA Glenn Research Center Message-Id: <5.1.1.5.2.20040630055355.0174aff0@popserve.lerc.nasa.gov> X-Sender: scberki@popserve.lerc.nasa.gov X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Wed, 30 Jun 2004 05:56:37 -0400 To: "Rotary motors in aircraft" From: Joseph M Berki Subject: Re: [FlyRotary] Re: Temps finally down Cc: "Rotary motors in aircraft" In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Nice work Steve, If you can, send some pics. Where are the rad and oil cooler located? Type and size? Joe Berki Limo EZ Looking at Mocal coolers and watching Ebay for 3rd gen coolers At 07:55 PM 6/29/2004 -0400, Ed Anderson wrote: >Sounds like you are closing on the solution, Steve, congratulations. Its >always nice when you get to the point where you can fly without one eye on >the temps. > >The boundary layer (particularly with coolers to the rear of an airframe) >appears to play a big role. The layer increases in depth as you go rearward >and it creates havoc with the operation of cooling ducts and diffusers. One >article I read indicated the American P-51 and German fighter designers >figured out the significance of keeping the boundary layer out of the >cooling ducts whereas the British supposedly continued to be plagued with >cooling problems with the Spitfires due to their cooling inlets being partly >in the boundary layer. FWIW > >Keep us apprised > >Ed > >Ed Anderson >RV-6A N494BW Rotary Powered >Matthews, NC >----- Original Message ----- >From: "Steve Brooks" >To: "Rotary motors in aircraft" >Sent: Tuesday, June 29, 2004 6:37 PM >Subject: [FlyRotary] Temps finally down > > > > I made my eight flight today, and I'm happy to report that my inlet scoop > > augmentation on the Cozy did the trick. > > I flew only about 1/2 hour because I had some other work that I wanted to >do > > on it, but the temperatures ran at 190 coolant, and 200 oil. > > I climbed up a couple thousand feet, and instead of throttling back and > > watching my temperatures come back down from 210/220, I wasn't quite up to >a > > stabilized temperature yet. That was a big change. I pulled power back >to > > what I had been running previously, and the temperatures stayed the same, > > maybe dropped a little. I then throttled up to zero boost, and the > > temperatures held. YEAH !!!!! They used to climb up with the throttle. > > On the decent to landing, I thought that I would have to chip the ice off >of > > the engine. Coolant dropped almost off the gauge to about 140, and oil >down > > to 160. Actually when I touched down, they were even lower than that. > > > > Now that I know that I can cool it, I'm going to make another scoop, > > narrower on the sides, but a little taller (actually lower) to get a >little > > further outside the boundary layer. The next scoop will have a smaller > > inlet area compared to the current one. > > > > Steve Brooks > > Cozy MKIV N75CZ > > Turbo Rotary > > > > > > > > > > >> Homepage: http://www.flyrotary.com/ > > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > > > > > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html