X-Virus-Scanned: clean according to Sophos on Logan.com From: "Bill Schertz" Received: from mail-pa0-f42.google.com ([209.85.220.42] verified) by logan.com (CommuniGate Pro SMTP 6.1.6) with ESMTPS id 8054651 for flyrotary@lancaironline.net; Wed, 07 Oct 2015 10:04:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.42; envelope-from=wschertz343@gmail.com Received: by padhy16 with SMTP id hy16so22623999pad.1 for ; Wed, 07 Oct 2015 07:04:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:from:to:references:in-reply-to:subject:date:mime-version :content-type:importance; bh=+fX9GExklfxQlBsx8tSobsoVHR+BO5rsJ1fvQ/YaT0A=; b=G56765mwqNKEEmAbHc+gSn4MqH64ot5nnTsdkOQUtqCaHfO9vVqBLO1ywxdHE3IZXa 4kosFewCaphqeElKCjYQPcqx6gJ65EC46quAUMCCkCXwCSsO7tz1iZ+9eZgnXHYUUMno Ifw53UjPYkdup0wz1cLHwq5GsWyZBoGCgGCqvlBWkqWACMc6vy4qHcBGXqFqCp5OXnKL 23GEmhhoMSNeJuBPpmTuvwi1Lm62RAzOqmWFwvAkRrcQEd8hUYKSL2xyyouMw5uH208a kXT4jShAYHW2DLIYo3YZG2BWC+LRYNll5dreTzEH3CT3JP3PV536ZMpZEixNCxamO2BP PFbQ== X-Received: by 10.66.228.97 with SMTP id sh1mr1289216pac.91.1444226640437; Wed, 07 Oct 2015 07:04:00 -0700 (PDT) Return-Path: Received: from OwnerPC (host-69-144-253-108.rvt-wy.client.bresnan.net. [69.144.253.108]) by smtp.gmail.com with ESMTPSA id kv9sm40108144pab.39.2015.10.07.07.03.59 for (version=TLSv1/SSLv3 cipher=OTHER); Wed, 07 Oct 2015 07:03:59 -0700 (PDT) Message-ID: <1D48DA3255254462883F3D89D5925705@OwnerPC> To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: To P or not... Date: Wed, 7 Oct 2015 08:03:39 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003E_01D100D6.ACC09A80" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 This is a multi-part message in MIME format. ------=_NextPart_000_003E_01D100D6.ACC09A80 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable can you give details on your custom built hotdog with inox? baffling. Thanks Bill Schertz From: Christian And Tam=20 Sent: Tuesday, October 06, 2015 11:08 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: To P or not... I would agree, yes it worked out to be allot more simpler running 2 x 2" = runners than playing with 4 in my opinion and easier to manufactur etc From modifying my engine from a not so good 6 port intake to a simple 2 = port intake I gained a good 30-40 hp and 15 k top end The noise also isn't that bad on my renises as I've attached a custom = built hotdog underneath with inox baffling which works well Sent from my iPhone On 7 Oct 2015, at 1:34 pm, Mark McClure = wrote: Trying to ensure I have a complete knowledge before I make my = decision, The P port as shown for the website is exactly what we are looking = for. Straight forward power at high rpm. The noise is a factor of = energy output which is the same. =20 If I tune a 4 port runner system and get x amount of air into the = engine I give y amount of fuel and I have z amount of power and engine = exhaust/noise to handle. If I use a P port and get x amount of air and give y amount of fuel it = is the exact same z output. It was just easier to get x amount of air = into the system. Or am I completely off base. On Oct 6, 2015, at 2:17 PM, William Jepson = wrote: Bob, One thing that everyone should get clear is that for aircraft PPorts = are almost always superior. At higher RPMs. Also Pports will idle just = fine. Good balance and vibration control are the key to good idle. The = engine won't make a lot of power at low rpm but that isn't a problem for = an aircraft. The rotary makes a better aircraft engine than a car = engine! Bill Jepson On Oct 6, 2015 9:14 AM, "Rogers, Bob J." = wrote: You should read the description of the effects of P-porting at = this website. See bottom entry. = http://www.mazdarotary.net/porting.htm And it is loud!!! See = https://www.youtube.com/watch?v=3DJebl2pWaiWI Bob J. Rogers -----Original Message----- From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] Sent: Tuesday, October 06, 2015 10:33 AM To: Rotary motors in aircraft Subject: [FlyRotary] To P or not... I understand the benefits of P porting the engine. And I think I = know the answer to my question but thought I'd verify. Looking for 180-200 hp. I have a freshly overhauled 2004 4 port = 13b. If the intake and exhaust are built right I should have no problem = getting that power NA. If I P port the intake it will be easier to make 200 or more. = however it is just easier to get air into the engine, and therefore more = fuel. But it is not by any means more fuel efficient? So therefore if I don't need the power I don't need to P port. Mark -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_003E_01D100D6.ACC09A80 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
can you give details on your custom built hotdog with inox? = baffling.
 
Thanks
Bill Schertz
 
Sent: Tuesday, October 06, 2015 11:08 PM
Subject: [FlyRotary] Re: To P or not...
 
I would agree, yes it worked out to be allot more simpler running 2 = x 2"=20 runners than playing with 4 in my opinion and  easier to manufactur = etc
From modifying my engine from a not so good 6 port intake to a = simple 2=20 port intake I gained a good 30-40 hp and 15 k top end
The noise also isn't that bad on my renises as I've attached a = custom built=20 hotdog underneath with inox baffling which works well


Sent from my iPhone

On 7 Oct 2015, at 1:34 pm, Mark McClure <flyrotary@lancaironline.net>=20 wrote:

Trying to ensure I have a complete knowledge before I make my=20 decision,
 
The P port as shown for the website is exactly what we are = looking for.=20 Straight forward power at high rpm.  The noise is a factor of = energy=20 output which is the same. 
 
If I tune a 4 port runner system and get x amount of air into the = engine=20 I give y amount of fuel and I have z amount of power and engine = exhaust/noise=20 to handle.
 
If I use a P port and get x amount of air and give y amount of = fuel it is=20 the exact same z output.  It was just easier to get x amount of = air into=20 the system.
 
Or am I completely off base.



On Oct 6, 2015, at 2:17 PM, William Jepson <flyrotary@lancaironline.net>=20 wrote:

Bob,
One thing that everyone should get clear is = that for=20 aircraft PPorts are almost always superior. At higher RPMs. Also = Pports will=20 idle just fine. Good balance and vibration control are the key to = good idle.=20 The engine won't make a lot of power at low rpm but that isn't a = problem for=20 an aircraft. The rotary makes a better aircraft engine than a car=20 engine!

Bill Jepson

On Oct 6, 2015 9:14 AM, "Rogers, Bob J." = <flyrotary@lancaironline.net>=20 wrote:
You=20 should read the description of the effects of P-porting at this=20 website.  See bottom entry.   http://www.mazdarotary.net/porting.htm  = And it is=20 loud!!!  See https://www.youtube.com/watch?v=3DJebl2pWaiWI

= Bob=20 J. Rogers

-----Original Message-----
From: Rotary motors = in=20 aircraft [mailto:flyrotary@lancaironline.net]
Sent:=20 Tuesday, October 06, 2015 10:33 AM
To: Rotary motors in=20 aircraft
Subject: [FlyRotary] To P or not...

I = understand the=20 benefits of P porting the engine.  And I think I know the = answer to=20 my question but thought I'd verify.

Looking for 180-200 = hp.  I=20 have a freshly overhauled 2004 4 port 13b.
If the intake and = exhaust=20 are built right I should have no problem getting that power = NA.

If=20 I P port the intake it will be easier to make 200 or more. however = it is=20 just easier to get air into the engine, and therefore more fuel. = But it is=20 not by any means more fuel efficient?

So therefore if I = don't need=20 the power I don't need to P=20 port.

Mark


--
Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l



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Homepage: =20 http://www.flyrotary.com/
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