X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao102.cox.net ([68.230.241.44] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3185864 for flyrotary@lancaironline.net; Wed, 24 Sep 2008 18:56:02 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.44; envelope-from=alventures@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao102.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080924225525.HVSY6684.fed1rmmtao102.cox.net@fed1rmimpo02.cox.net> for ; Wed, 24 Sep 2008 18:55:25 -0400 Received: from BigAl ([72.192.137.74]) by fed1rmimpo02.cox.net with bizsmtp id JmvS1a0081cVYgg04mvStX; Wed, 24 Sep 2008 18:55:26 -0400 X-Authority-Analysis: v=1.0 c=1 a=3oc9M9_CAAAA:8 a=RSN7fZwbmUPDN8yY0egA:9 a=yd1bU1QymJ6GZlp7z4YA:7 a=IHrlhYYso0U4LKdoSJkW-fKEMFUA:4 a=gi0PWCVxevcA:10 a=RlryLpTbk1IsmeZ-Un0A:9 a=VykJ7YsniWL_ZO1ZKNwA:7 a=N4M-DpZpj2BtFjLWkZPlUCmSBoQA:4 a=37WNUvjkh6kA:10 X-CM-Score: 0.00 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Vacuum Pulses Date: Wed, 24 Sep 2008 15:56:10 -0800 Message-ID: <8F85631C5E084A6EBEFCB84FC2C80FC1@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0048_01C91E5E.104E3610" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0048_01C91E5E.104E3610 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I agree guys, unless you have a valid ram air scoop. Or any pressure changing device that is connected to your intake. A good ram air will produce elevated pressure and no MAP reference pressure regulator can = make your mixture go lean. Bill Jepson =20 Not really, Bill. Even at the incredible speed :-) of my Velocity 20B (let=92s say 160 Indicated) the ram pressure is about 1 =BC=94 Hg =96 IF = the scoop and ducting are 100% efficient. Not going to have a noticeable effect = on tuning. =20 Al G _____ =20 Find phone numbers fast with the New AOL Yellow = Pages! ------=_NextPart_000_0048_01C91E5E.104E3610 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I agree guys, unless you have a valid ram air scoop. Or any pressure = changing device that is connected to your intake. A good ram air will produce = elevated pressure and no MAP reference pressure regulator can make your mixture = go lean.
Bill Jepson

 

Not really, Bill.=A0 Even at the incredible speed J of my Velocity= 20B (let’s say 160 Indicated) the ram pressure is = about 1 =BC” Hg – IF the scoop and ducting are 100% efficient.=A0 Not going to = have a noticeable effect on tuning.

 

Al G

Find phone = numbers fast with the New AOL Yellow = Pages!

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