X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mx1.magmacom.com ([206.191.0.217] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTPS id 936498 for flyrotary@lancaironline.net; Sun, 08 May 2005 12:16:02 -0400 Received-SPF: none receiver=logan.com; client-ip=206.191.0.217; envelope-from=ianddsl@magma.ca Received: from mail4.magma.ca (mail4.magma.ca [206.191.0.222]) by mx1.magmacom.com (8.13.0/8.13.0) with ESMTP id j48GFBEb026536 for ; Sun, 8 May 2005 12:15:12 -0400 Received: from binky (ottawa-hs-64-26-156-111.s-ip.magma.ca [64.26.156.111]) by mail4.magma.ca (8.13.0/8.13.0) with SMTP id j48GF7Jn030870 for ; Sun, 8 May 2005 12:15:11 -0400 Reply-To: From: "Ian Dewhirst" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] 4-port intake measurements Date: Sun, 8 May 2005 12:15:05 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02D7_01C553C7.91741B70" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_02D7_01C553C7.91741B70 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit MessageHi Rusty, are you refering to 4 straight variable lenght runners that extend into a plenum with the throttle body at one end, injectors inject into the runners? -- Ian -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Russell Duffy Sent: Sunday, May 08, 2005 12:00 PM To: Rotary motors in aircraft Subject: [FlyRotary] 4-port intake measurements Greetings, I brought a 4 port intake gasket home, since these are a very good match to my current ports, and did some measuring of areas. The port holes are elongated circles, and were calculated that way. Secondary- 1.5" tall x 1.125" wide. This gives a 1.125" circle equal to .99 sq in, and a rectangular area of .375" x 1.25" equaling .42 sq in. Total area for one secondary port is 1.41 sq in. This would equal a round tube with the a 1.34" ID. Primary- 1.5625 tall x .75" wide. This gives a .75" circle equal to .44 sq in, and a rectangular area of .8125" x .75" equal to .61 sq in. Total area for one primary is 1.05 sq in. . This would equal a round tube with the a 1.16" ID. The total area for a combined primary and secondary is 2.46 sq in. My current 1.625" ID tubing only has an area of 2.07 sq in, meaning it's 16% smaller than the runners in the side of the housing. A combined runner would require at least a 1.77" ID tube to feed the primary and secondary of one rotor. I'm looking into making a "simple" style intake like Tracy, and Bruce are doing, though I haven't committed to any particular design. Cheers, Rusty ------=_NextPart_000_02D7_01C553C7.91741B70 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Hi=20 Rusty, are you refering to 4 straight variable lenght runners that = extend=20 into a plenum with the throttle body at one end, injectors inject into = the=20 runners? -- Ian
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Russell=20 Duffy
Sent: Sunday, May 08, 2005 12:00 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] 4-port intake=20 measurements

Greetings,
 

I brought a 4=20 port intake gasket home, since these are a very good match to my = current=20 ports, and did some measuring = of=20 areas.  The port holes = are=20 elongated circles, and were calculated that way. 

 

Secondary-=20 1.5” tall x 1.125” wide.  This=20 gives a 1.125” circle equal to .99 sq in, and a rectangular area = of .375” x=20 1.25” equaling .42 sq in.  =20 Total area for one secondary port is 1.41 sq in.  This would equal a round = tube with the=20 a 1.34” ID.

 

Primary-=20 1.5625 tall x .75” wide.  = This=20 gives a .75” circle equal to .44 sq in, and a rectangular area = of  .8125” x .75” = equal to .61 sq in.  Total area for one primary = is 1.05 sq=20 in.  .  This would equal a round = tube with the=20 a 1.16” ID.

 

The total area=20 for a combined primary and secondary is 2.46 sq in.  My current 1.625” ID = tubing only has=20 an area of 2.07 sq in, meaning it’s 16% smaller than the runners = in the side=20 of the housing.  A = combined runner=20 would require at least a 1.77” ID tube to feed the primary and = secondary of=20 one rotor. 

 

I'm=20 looking into making a "simple" style intake like Tracy, and Bruce = are=20 doing, though I haven't committed to any particular=20 design.  

 

Cheers,

=

Rusty=20 =  

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