Return-Path: Received: from mailout1.accesscomm.ca ([204.83.142.27] verified) by logan.com (CommuniGate Pro SMTP 4.2.3) with ESMTP id 438734 for flyrotary@lancaironline.net; Thu, 30 Sep 2004 17:41:00 -0400 Received-SPF: pass receiver=logan.com; client-ip=204.83.142.27; envelope-from=jjjohnson@accesscomm.ca Received: from Drafting1 (static24-72-101-251.weyburn.accesscomm.ca [24.72.101.251]) by mailout1.accesscomm.ca (Access Communications) with ESMTP id i8ULeTGP003073 for ; Thu, 30 Sep 2004 15:40:29 -0600 Message-ID: <00ba01c4a736$1b52f2b0$8200a8c0@Drafting1> From: "Jarrett Johnson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: oil coolers Date: Thu, 30 Sep 2004 15:40:29 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00B7_01C4A703.D0842C40" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_00B7_01C4A703.D0842C40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable That looks wonderful, Al, BUT.... I have to wonder.. any loss of lift = or disruption with the use of that arrangement? Anyone else doing it = that way or are you the first that you know of.. Finally... temperature = issues. I remember when we did post cure on the airframe on a hot july = day, we coated it in black plastic in the yard. I dont recall seeing 200 = degree F temps... what are you using to keep the foam near the radiators = from approaching that temp and post-curing additionally? =20 I LIKE what I'm seeing but I am concerned too (I plan someday to build = my own, so I don't have to mooch off Chris all the time for airplane = priveledges) =20 Dave I to have been wondering about this. I'm actually going to be running a = similar set up through a CFD program here in the next couple weeks [ = time permitting] So I should get a pretty good idea as to its effects. = My major question is how does/would/will it cool on the ground? Esp. in = a pusher configuration.. It will be interesting to hear once Al gets it = flying. My configuration would be a bit different as I'm going to try = and put it right infront of the flap line.. and using it something like = a SLOT in the back of the wing.. the induction will be located a bit = farther ahead.. near the 30-40% chord. As far as the way pressure = distribution is concerned, its one of the best set-up's I can think of. = It works harder in the climb because of the higher delta P over/under = the wing [however it may effect climb rate a bit] and works less during = cruise where you'll need less cooling.. All theory at this point.. Jarrett Johnson ------=_NextPart_000_00B7_01C4A703.D0842C40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
That looks wonderful, Al, BUT.... I have to wonder..  any = loss of=20 lift or disruption  with the use of that arrangement? Anyone else = doing=20 it that way or are you the first that you know of..  Finally...=20 temperature issues. I remember when we did post cure on the airframe = on a hot=20 july day, we coated it in black plastic in the yard. I dont recall = seeing 200=20 degree F temps... what are you using to keep the foam near the = radiators from=20 approaching that temp and post-curing additionally?
 
I = LIKE what=20 I'm seeing but I am concerned too (I plan someday to build my own, so = I don't=20 have to mooch off Chris all the time for airplane=20 priveledges)
 
Dave
 
 
 
 
I to have been wondering about this. = I'm actually=20 going to be running a similar set up through a CFD program here in the = next=20 couple weeks [ time permitting] So I should get a pretty good idea as to = its=20 effects. My major question is how does/would/will it cool on the ground? = Esp.=20 in  a pusher configuration.. It will be interesting to hear once Al = gets it=20 flying. My configuration would be a bit different as I'm going to try = and put it=20 right infront of the flap line.. and using it something like a SLOT in = the back=20 of the wing.. the induction will be located a bit farther ahead.. near = the=20 30-40% chord. As far as the way pressure distribution is concerned, its = one of=20 the best set-up's I can think of. It works harder in the climb because=20 of the higher delta P over/under the wing [however it may = effect=20 climb rate a bit] and works less during cruise where you'll need less=20 cooling..  All theory at this point..
 
Jarrett = Johnson
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