X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115] verified) by logan.com (CommuniGate Pro SMTP 5.0.8) with ESMTP id 1043406 for flyrotary@lancaironline.net; Thu, 23 Mar 2006 00:07:11 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.115; envelope-from=keltro@att.net Received: from mwebmail08.att.net ([204.127.135.29]) by worldnet.att.net (mtiwmhc11) with SMTP id <20060323050619111004bvnie>; Thu, 23 Mar 2006 05:06:24 +0000 Received: from [63.157.92.121] by mwebmail08.att.net; Thu, 23 Mar 2006 05:06:18 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: [FlyRotary] Re: pitot inlet Date: Thu, 23 Mar 2006 05:06:18 +0000 Message-Id: <032320060506.29433.44222CC900000FEA000072F92160375964019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 28 2006) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_29433_1143090378_0" --NextPart_Webmail_9m3u9jl4l_29433_1143090378_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit M Roberts wrote: > Monty, > > When you suggested using a pitot style air intake for the cooling, > what exactly did you mean by 'pitot'. I envision it to be a tubular > structure that extends forward of the wing's leading edge, but would > the extension be a slight bump or a lance worthy of slaying dragons? > As it stands, I have about 32" from the leading edge for a duct to > feed a 4" thick, 13.5"x9" radiator. (I'm still trying to source a > radiator without going the custom build route.) I don't need any more > length to get a fully developed K&W streamlined duct, but if I need to > extend the opening out significantly from the leading edge it will > need to be incorporated into the design. > > Ernest, > > I was a little unclear. I meant a standard leading edge inlet. That is perfect then. Well, as close as you can get with all the compromises you have to work through. The duct will have to be 32". If I try to move the radiator forward, the airfoil contour of the strake starts to cut the available area really fast. > > I would locate the inlets in the outer portion of the prop arc. There > is much more velocity there for ground cooling. You have a unique > situation where that is possible. The openings should be smack dab in the middle of the outer 1/3rd. The center of the duct opening will be 31" off the fuselage's center line. I believe I'll be able to fit a 72" prop, but that is about the limit on a Delta. This layout looks better every time I review it. Ernest, What have I been telling you all along !! By the way my evaporators are about 9.5" x 13.5" x 3.75" if my memory (undependable) is right.. The 13.5" includes the end tanks........Were for last of the big Cad. (1977) Eldorado's and perhaps other big G.M. cars of that era......... -- Kelly Troyer Dyke Delta/13B/RD1C/EC2 --NextPart_Webmail_9m3u9jl4l_29433_1143090378_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

M Roberts wrote:

> Monty,
>
> When you suggested using a pitot style air intake for the cooling, 
> what exactly did you mean by 'pitot'. I envision it to be a tubular 
> structure that extends forward of the wing's leading edge, but would 
> the extension be a slight bump or a lance worthy of slaying dragons? 
> As it stands, I have about 32" from the leading edge for a duct to 
> feed a 4" thick, 13.5"x9" radiator. (I'm still trying to source a 
> radiator without going the custom build route.) I don't need any more 
> length to get a fully developed K&W streamlined duct, but if I need to 
> extend the opening out significantly from the leading edge it will 
> need to be incorporated into the design.
>
> Ernest,
>  
> I was a little unclear. I meant a standard leading edge inlet.

That is perfect then.  Well, as close as you can get with all the 
compromises you have to work through.  The duct will have to be 32".  If 
I try to move the radiator forward, the airfoil contour of the strake 
starts to cut the available area really fast.

>  
> I would locate the inlets in the outer portion of the prop arc. There 
> is much more velocity there for ground cooling. You have a unique 
> situation where that is possible.

The openings should be smack dab in the middle of the outer 1/3rd.  The 
center of the duct opening will be 31" off the fuselage's center line.  
I believe I'll be able to fit a 72" prop, but that is about the limit on 
a Delta.

This layout looks better every time I review it.

Ernest,

What have I been telling you all along !! By the way my evaporators

are about 9.5" x 13.5" x 3.75" if my memory (undependable) is right..

The 13.5" includes the end tanks........Were for last of the big Cad.

(1977) Eldorado's and perhaps other big G.M. cars of that era.........

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

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