X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([207.115.11.52] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2795193 for flyrotary@lancaironline.net; Mon, 17 Mar 2008 10:12:38 -0400 Received-SPF: none receiver=logan.com; client-ip=207.115.11.52; envelope-from=keltro@att.net Received: from fwebmail32.isp.att.net ([207.115.9.162]) by isp.att.net (frfwmhc02) with SMTP id <20080317141159H0200amhkne>; Mon, 17 Mar 2008 14:11:59 +0000 X-Originating-IP: [207.115.9.162] Received: from [4.244.72.182] by fwebmail32.isp.att.net; Mon, 17 Mar 2008 14:11:58 +0000 From: "Kelly Troyer" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Porting Date: Mon, 17 Mar 2008 14:11:58 +0000 Message-Id: <031720081411.3145.47DE7C2D000805FF00000C4922193100029B0A02D29B9B0EBF019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Feb 26 2008) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_3145_1205763118_0" --NextPart_Webmail_9m3u9jl4l_3145_1205763118_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Ernest, I sealed up the EGR holes in the center housing by runnung a 7/16" NC tap down them (it will make shallow threads) and installing a length of 7/16" NC" "all thread" with a screwdriver slot cut in one end.........I used Hi-Temp threadlocker on threads and filled top end with "JB Weld".........Then smooth what extends into port to match port contours.........A standard tap is a little too short so I purshased a longer tap for a few dollars..........FWIW http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingFront.jpg -- Kelly Troyer "Dyke Delta"_13B ROTARY Engine "RWS"_RD1C/EC2/EM2 "Mistral"_Backplate/Oil Manifold -------------- Original message from Ernest Christley : -------------- > Porting an engine with a drill will destroy it. > > Plain and simple. No ifs, ands or buts. I have a die grinder, but > nothing more than a pancake compressor so actually using it is painful. > I could buy a larger compressor, but then I have to find someplace to > store it. Having everything else I need to start the porting process, I > improvised. Chucked the parabolic bit into my drill and had at it. > > 4 hours, and only one oopsie, later, I had a nicely ported intake, and a > drill with a chuck that wobbles like a drunken sailor. I'm talking at > least 1/2" of play at the tip of the chuck. Fortunately, these drills > are cheap at Northern Tool. I can get them for $15 when they're on > sale. The extra handle gives you a lot to hold onto as you're grinding > away; hence, the single oopsie. You hate for tools to be considered > disposable, but in this case it worked out really well. > > http://ernest.isa-geek.org/Delta/Pictures/ EnginePortingTemplate.jpg > http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingRear.j > pg > > http://ernest.isa-geek.org/Delta/Pictures/EnginePortingRearHousing.jpg > http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingFront. > jpg > > http://ernest.isa-geek.org/Delta/Pictures/EnginePortingRearHousing2.jpg > > http://ernest.isa-geek.org/Delta/Pictures/EnginePortingFrontHousingOopsie.jpg > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --NextPart_Webmail_9m3u9jl4l_3145_1205763118_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Ernest,

I sealed up the EGR holes in the center housing by runnung a

7/16" NC tap down them (it will make shallow threads) and

installing a length of 7/16" NC" "all thread" with a screwdriver

slot cut in one end.........I used Hi-Temp threadlocker on threads

and filled top end with "JB Weld".........Then smooth what extends

into port to match port contours.........A standard tap is a little too

short so I purshased a longer tap for a few dollars..........FWIW

http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingFront.jpg

--
Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

-------------- Original message from Ernest Christley <echristley@nc.rr.com>: --------------

> Porting an engine with a drill will destroy it.
>
> Plain and simple. No ifs, ands or buts. I have a die grinder, but
> nothing more than a pancake compressor so actually using it is painful.
> I could buy a larger compressor, but then I have to find someplace to
> store it. Having everything else I need to start the porting process, I
> improvised. Chucked the parabolic bit into my drill and had at it.
>
> 4 hours, and only one oopsie, later, I had a nicely ported intake, and a
> drill with a chuck that wobbles like a drunken sailor. I'm talking at
> least 1/2" of play at the tip of the chuck. Fortunately, these drills
> are cheap at Northern Tool. I can get them for $15 when they're on
> sale. The extra handle gives you a lot to hold onto as you're grinding
> away; hence, the single oopsie. You hate for tools to be considered
> disposable, but in this case it worked out really well.
>
> http://ernest.isa-geek.org/Delta/Pictures/ EnginePortingTemplate.jpg
> http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingRear.j
> pg
>
> http://ernest.isa-geek.org/Delta/Pictures/EnginePortingRearHousing.jpg
> http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingFront.
> jpg
>
> http://ernest.isa-geek.org/Delta/Pictures/EnginePortingRearHousing2.jpg
>
> http://ernest.isa-geek.org/Delta/Pictures/EnginePortingFrontHousingOopsie.jpg
>
>
>
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancaironline.net:81/li sts/flyrotary/List.html

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