X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4216278 for flyrotary@lancaironline.net; Fri, 09 Apr 2010 21:11:36 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (mail.aanet.com.au [203.24.100.34]) by poplet2.per.eftel.com (Postfix) with ESMTP id 510FA1738E4 for ; Sat, 10 Apr 2010 09:11:01 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 7D5EEBEC037 for ; Sat, 10 Apr 2010 09:11:00 +0800 (WST) Message-ID: <1A0A0C387C084D529B2156EB6AB241A6@ownerf1fc517b8> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Tuned lengths Date: Sat, 10 Apr 2010 11:11:01 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0010_01CAD89E.80F4A6F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 100409-1, 04/09/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0010_01CAD89E.80F4A6F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable For those not in a hurry, I believe Bill Jepson is working on a slide = throttle - as well as the P-ports. George ( down under) Ya, I considered it for a bit. You don't *have* to have a slide = throttle but in the end, I can make a cast manifold and the throttle = bodies easily, but not the P-Port mods. =20 A man's got to know his limitations... =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Mark Steitle Sent: Friday, April 09, 2010 5:32 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Tuned lengths =20 Bill,=20 =20 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. ;-)=20 =20 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 and tuning became less critical.=20 Where did you get the tubes to weld-up? I'm planning on making a = casting myself but it would nice to know alternate sources. Bill; I don't recall where I got the tube - 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 = - then welded into the water-jet cut flange. =20 Al =20 =20 =20 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 aircraft Subject: [FlyRotary] Tuned lengths =20 To: Rotary motors in aircraft Subject: [FlyRotary] Re: Tuned lengths =20 Please post drawings/photos/specs...Yvon =20 Some photos of the intake manifold for the 20B are attached. It is = 4.5" from flange to flange; the TB flange is at a slight angle to fit my = installation; the TB is TWM 3003; 44mm diameter bores. =20 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'll = have to check. That's a real deal - by the time I had mine fabricated = and heat treated it was over $2000. Let me know if anyone is = interested. =20 Al =20 ------=_NextPart_000_0010_01CAD89E.80F4A6F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
For those not in a hurry, I believe = Bill Jepson is=20 working on a slide throttle - as well as the P-ports.
George ( down under)

Ya,=20 I considered it for a bit.  You don=92t *have* to have a = slide=20 throttle but in the end, I can make a cast manifold and the throttle = bodies=20 easily, but not the P-Port mods.

 

A=20 man=92s got to know his limitations=85..

 

From: Rotary = motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark = Steitle
Sent: Friday, April 09, 2010 5:32 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: Tuned=20 lengths

 

Bill, 

 

One nice thing about the p-port motor is that the = intake is=20 super simple make.  Of course, you've got to build a slide = throttle.=20  ;-) 

 

Mark

On Fri, Apr 9, 2010 at 12:36 PM, Al Gietzen = <ALVentures@cox.net>=20 wrote:

My=20 understanding is that one advantage to using individual throttles as = you did=20 was that it mitigated the effect of pulses between the intakes and = tuning=20 became less critical.

Where=20 did you get the tubes to weld-up?  I=92m planning on making a = casting=20 myself but it would nice to know alternate = sources.

Bill;

I=20 don=92t recall where I got the tube =96 there are a number of = vendors.  I=20 think I bought U-bends which were then cut and welded. The tube size = was=20 chosen to have a circumference close to match that of the ports.  = The=20 fabricator then made mandrels to shape the tubes to match the ports = =96 then=20 welded into the water-jet cut flange.

 

Al

 

 

 

From: Rotary = motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of = Al=20 Gietzen
Sent: Thursday, April 01, 2010 5:06 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Tuned=20 lengths

 

To: Rotary = motors in=20 aircraft
Subject: [FlyRotary] Re: Tuned=20 lengths

 

Please post=20 drawings/photos/specs...Yvon

 

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

 

Another=20 builder built his from my drawings and had a couple extra = made.  At=20 least one is still available. The price is around $1000; I=92ll have = to check.=20 That=92s a real deal =96 by the time I had mine fabricated and heat = treated it=20 was over $2000.  Let me know if anyone is=20 interested.

 

Al

=  

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