Return-Path: Received: from mail13.syd.optusnet.com.au ([211.29.132.194] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP-TLS id 794122 for flyrotary@lancaironline.net; Tue, 15 Mar 2005 04:59:40 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.194; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-113-25.dsl.nsw.optusnet.com.au [211.31.113.25]) by mail13.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j2F9wmqo025367 for ; Tue, 15 Mar 2005 20:58:50 +1100 Message-ID: <001d01c52945$ff365440$19711fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: peripheral ports Date: Tue, 15 Mar 2005 20:01:45 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001A_01C52999.D0651DF0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_001A_01C52999.D0651DF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Alex, The PP isn't complex at all, it could be tweaked to maximize gas flow = but that's about all. It is so simple in fact Jerry and I came to the = same conclusion that round is almost perfect anyway. George (down under) ----- Original Message -----=20 From: Alex Madsen=20 To: Rotary motors in aircraft=20 Sent: Tuesday, March 15, 2005 1:55 PM Subject: [FlyRotary] Re: peripheral ports Jerry, have you looked into getting your P-port insert rapid cast? If = I remember correctly it has a complex internal geometry. http://www.protcast.com/foundry.htm =20 Alex Madsen PS While you are at it how about some AL side housings ;) =20 =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Jerry Hey Sent: Monday, March 14, 2005 6:42 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: peripheral ports =20 On Monday, March 14, 2005, at 01:26 PM, Richard Sohn wrote: ----- Original Message ----- From: Jerry Hey To: Rotary motors in aircraft Sent: Monday, March 14, 2005 5:33 AM Subject: [FlyRotary] Re: peripheral ports On Monday, March 14, 2005, at 08:02 AM, Paul wrote: Paul, all the companies you list sell housings with BIG p - ports and = massive overlap. They are designed to develop tremendous hp at high rpm = for racing. Of course they don't idle smoothly. These engines have = nothing to do with the smaller, conservatively timed p ports that we = wish to use as aircraft engines. Jerry Jerry, what are you calling consevatively timed p-ports? Just want to see were I stand with mine. Richard Sohn N-2071U Richard here is the timing on my p port. I.O.=3D 78=BA BTDC I.C.=3D = 75=BA ABDC=20 In the attached drawing the opening and closing events are measured = from the housing center line. My p port is on the left. The Leman p port = is on the right. Jerry ------=_NextPart_000_001A_01C52999.D0651DF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Alex,
The PP isn't complex at all, it could = be tweaked to=20 maximize gas flow but that's about all. It is so simple in fact Jerry = and I came=20 to the same conclusion that round is almost perfect anyway.
George (down under)
----- Original Message -----
From:=20 Alex=20 Madsen
Sent: Tuesday, March 15, 2005 = 1:55=20 PM
Subject: [FlyRotary] Re: = peripheral=20 ports

Jerry, have = you=20 looked into getting your P-port insert rapid cast? If I remember = correctly it=20 has a complex internal geometry.

http://www.protcast.com/foun= dry.htm

 

Alex=20 Madsen

PS While = you are at=20 it how about some AL side housings  ;)

 

 

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On=20 Behalf Of Jerry Hey
Sent: Monday, March 14, 2005 = 6:42=20 PM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: = peripheral=20 ports

 


On Monday, March 14, = 2005, at 01:26=20 PM, Richard Sohn wrote:



----- Original = Message=20 -----
From: = Jerry Hey
To: Rotary motors in=20 aircraft
Sent: Monday, March 14, 2005 = 5:33=20 AM
Subject: = [FlyRotary] Re:=20 peripheral ports


On Monday, March 14, 2005, at 08:02 AM, = Paul=20 wrote:



Paul, all the companies you list sell housings = with BIG=20 p - ports and massive overlap. They are designed to develop tremendous = hp at=20 high rpm for racing. Of course they don't idle smoothly. These engines = have=20 nothing to do with the smaller, conservatively timed p ports that we = wish to=20 use as aircraft engines.=20 Jerry

Jerry,

what=20 are you calling consevatively timed = p-ports?
Just=20 want to see were I stand with = mine.

Richard=20 Sohn
N-2071U

Richard here is the timing on my p port. = I.O.=3D 78=BA=20 BTDC I.C.=3D 75=BA ABDC

In the attached drawing the opening = and closing=20 events are measured from the housing center line. My p port is on the = left.=20 The Leman p port is on the right.=20 Jerry

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