X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-iw0-f173.google.com ([209.85.223.173] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4216259 for flyrotary@lancaironline.net; Fri, 09 Apr 2010 20:32:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.223.173; envelope-from=msteitle@gmail.com Received: by iwn3 with SMTP id 3so1767880iwn.3 for ; Fri, 09 Apr 2010 17:31:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:content-type; bh=K3dVeVP2DsqT/c90JZIR+nnIrjJW7UxI97Csv0CWFJc=; b=EA8ICqAMTaqp7tK/BEU/ctZ5wal1FJgpcYZ63Q9gbvLKFUx/qzJnUrKtJ2RCluPNTW MlcVKVKHSNRqwfdweDF8gcTpNwM06Grfz7iPMITwFFR/d887/AD40CAr3hYFoMIYuWOZ 0QfqQMGp3rtXc4jsxwFtPQBYRwzMwY74yNKN0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=HkdRRrIbB5keT5J+jgPPpJUy5iAtL0q9ysAxc3tnImUKjO1xPcYNWfiAcDyUyPkRic F0kmFixZNeU9172oCXGC6I9YTYqYKARBxU8t/6xq35M+Vu2yVRGkvthErB90jQ0WMEVk cYSTobXZhBDU9l1tbkua4lZkHEoDGy1fnLcyQ= MIME-Version: 1.0 Received: by 10.231.183.195 with HTTP; Fri, 9 Apr 2010 17:31:32 -0700 (PDT) In-Reply-To: References: Date: Fri, 9 Apr 2010 19:31:32 -0500 Received: by 10.231.160.135 with SMTP id n7mr352525ibx.26.1270859492647; Fri, 09 Apr 2010 17:31:32 -0700 (PDT) Message-ID: Subject: Re: [FlyRotary] Re: Tuned lengths From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0016e68e8b709e65d90483d70863 --0016e68e8b709e65d90483d70863 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Bill, One nice thing about the p-port motor is that the intake is super simple make. Of course, you've got to build a slide throttle. ;-) Mark On Fri, Apr 9, 2010 at 12:36 PM, Al Gietzen wrote: > My understanding is that one advantage to using individual throttles as > you did was that it mitigated the effect of pulses between the intakes an= d > tuning became less critical. > > Where did you get the tubes to weld-up? I=92m planning on making a casti= ng > myself but it would nice to know alternate sources. > > Bill; > > I don=92t recall where I got the tube =96 there are a number of vendors. = I > think I bought U-bends which were then cut and welded. The tube size was > chosen to have a circumference close to match that of the ports. The > fabricator then made mandrels to shape the tubes to match the ports =96 t= hen > welded into the water-jet cut flange. > > > > Al > > > > > > > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Al Gietzen > *Sent:* Thursday, April 01, 2010 5:06 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Tuned lengths > > > > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: Tuned lengths > > > > *Please post drawings/photos/specs...Yvon* > > > > Some photos of the intake manifold for the 20B are attached. It is 4.5=94 > from flange to flange; the TB flange is at a slight angle to fit my > installation; the TB is TWM 3003; 44mm diameter bores. > > > > Another builder built his from my drawings and had a couple extra made. = At > least one is still available. The price is around $1000; I=92ll have to c= heck. > That=92s a real deal =96 by the time I had mine fabricated and heat treat= ed it > was over $2000. Let me know if anyone is interested. > > > > Al > > --0016e68e8b709e65d90483d70863 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Bill,=A0

One nice thing about the p-port motor is that t= he intake is super simple make. =A0Of course, you've got to build a sli= de throttle. =A0;-)=A0

Mark

On Fri, Apr 9, 2010 at 12:36 PM, Al Gietzen <ALVentures@cox.net> wrote:
=

My understanding is that one advantage to using individual throttles as you di= d was that it mitigated the effect of pulses between the intakes and tuning became less critical.

Where did you get the tubes to weld-up?=A0 I=92m planning on making a casting myself but it would nice to know alternate sources.

Bill;

I don=92t reca= ll where I got the tube =96 there are a number of vendors.=A0 I think I bought U-bends which were then cut and welded. The tube size was chosen to have a circumfe= rence close to match that of the ports.=A0 The fabricator then made mandrels to shape the tubes to match the ports =96 then welded into the water-jet cut flange.

=A0

Al

=A0

=A0

=A0

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Thursday, April 01, 2010 5:06 PM
To: Rotary motors in aircraf= t
Subject: [FlyRotary] Tuned l= engths

=A0

To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Tun= ed lengths

=A0

Please post drawings/photos/specs...Yvon

=A0

Some photos of the intake manifold for the 20B are attached. It is 4.5=94 from flange to flange; the TB flange is at a slight angle to fit my installation= ; the TB is TWM 3003; 44mm diameter bores.

=A0

Another builder built his from my drawings and had a couple extra made.=A0 At least one is still available. The price is around $1000; I=92ll have to check. That=92s a real deal =96 by the time I had mine fabricated and heat treated it was over $2000.=A0 Let me know if anyone is interested.

=A0

Al


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