Return-Path: Received: from mail16.syd.optusnet.com.au ([211.29.132.197] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP-TLS id 793668 for flyrotary@lancaironline.net; Mon, 14 Mar 2005 20:26:25 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.197; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-127-96.dsl.nsw.optusnet.com.au [220.236.127.96]) by mail16.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j2F1PYMs016746 for ; Tue, 15 Mar 2005 12:25:36 +1100 Message-ID: <002f01c528fe$4c741f50$607fecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: peripheral ports Date: Tue, 15 Mar 2005 11:28:31 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002C_01C52952.1DBFE6E0" 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_002C_01C52952.1DBFE6E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Richard,=20 Did you see my endhousing pattern? From what I have gathered from you and Jerry is that you open with the = Le Mans and close 1.5" later and Jerry closes with the Le Mans and opens = 1.5" earlier. So both might be fine, I just seen a little more chance for exhaust = contamination for the early opening and am unsure if the later opening = sees any compression with the 1.5" manifold tubes - which provide more = velocity than the 2" . This velocity is more important at idle( = overcoming exhaust and backpressure) and our RPM range around 6,000 to = 7,500 rpm.=20 George (down under) Richard, running my engine will be in late summer. It is a time and = money thing. Both are in short supply.. Jerry On Monday, March 14, 2005, at 09:32 PM, Richard Sohn wrote: Hi Jerry, my p-port opens the same as the LeMans with also 1,5 = opening, and still idles fine with just the carb. I am looking at = closing it later than it is now for the final tuning, but I do not plan = to open it any later. Believe me, I was surprised when I saw the engine = run like that the first time. I think on the 13B housing(12A is running = now) it looks like a 2" round port will give me about the same = characteristics. How far are you away from running your engine? =20 Richard Sohn N-2071U =20 =20 ----- Original Message ----- From: Jerry Hey To: Rotary motors in aircraft Sent: Monday, March 14, 2005 3:28 PM Subject: [FlyRotary] Re: peripheral ports Hi Richard, my p port opens much later than the Leman's and it = closes about the same. It is 1.5 dia so obviously it cannot match the = plus two inch of the Leman's port as far as timing is concerned. If you = want the actual degree for the opening and closing events I can dig them = out for you no problem. I admire your work and intend to copy the one = rotor next year. Jerry 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 =20 =20 No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.7.2 - Release Date: 3/11/2005 ------=_NextPart_000_002C_01C52952.1DBFE6E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hello Richard,
Did you see my endhousing = pattern?
 
From what I have gathered from you and = Jerry is=20 that you open with the Le Mans and close 1.5" later and Jerry closes = with the Le=20 Mans and opens 1.5" earlier.
 
So both might be fine, I just seen a = little more=20 chance for exhaust contamination for the early opening and am unsure if = the=20 later opening sees any compression with the 1.5" manifold tubes - which = provide=20 more velocity than the 2" . This velocity is more important at = idle(=20 overcoming exhaust and backpressure) and our RPM range around 6,000 = to=20 7,500 rpm. 
George (down under)
Richard,=20 running my engine will be in late summer. It is a time and money = thing. Both=20 are in short supply.. Jerry
On Monday, March 14, 2005, at 09:32 PM, = Richard=20 Sohn wrote:

Hi Jerry, my p-port = opens=20 the same as the LeMans with also 1,5 opening, and still idles fine = with just=20 the carb. I am looking at closing it later than it is now for the = final=20 tuning, but I do not plan to open it any later. Believe me, I was = surprised=20 when I saw the engine run like that the first time. I think on the = 13B=20 housing(12A is running now) it looks like a 2" round port = will give=20 me about the same = characteristics.
How=20 far are you away from running your=20 engine?
 
Richard=20 = Sohn
N-2071U
 
 

-----= =20 Original Message -----
From:=20 Jerry = Hey
To: Rotary = motors in=20 aircraft
Sent: Monday, March 14, 2005 3:28=20 PM
Subject: [FlyRotary] Re: peripheral ports

Hi = Richard, my=20 p port opens much later than the Leman's and it closes about the = same. It is=20 1.5 dia so obviously it cannot match the plus two inch of the = Leman's port=20 as far as timing is concerned. If you want the actual degree for the = opening=20 and closing events I can dig them out for you no problem. I admire = your work=20 and intend to copy the one rotor next year. Jerry


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



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


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



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

Jerry,

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

Richard=20 = Sohn
N-2071U
 



 

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No=20 virus found in this incoming message.
Checked by AVG=20 Anti-Virus.
Version: 7.0.308 / Virus Database: 266.7.2 - Release = Date:=20 3/11/2005

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