X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from m15.nyc.untd.com ([64.136.22.78] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with SMTP id 950581 for flyrotary@lancaironline.net; Thu, 19 May 2005 21:28:01 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.22.78; envelope-from=jbker@juno.com Received: from m15.nyc.untd.com (localhost [127.0.0.1]) by m15.nyc.untd.com with SMTP id AABBJ4RF5AB2KPSJ for (sender ); Thu, 19 May 2005 18:26:19 -0700 (PDT) X-UNTD-OriginStamp: Y+Mfppm2QyGfnY/dq+iW1Vkd0wjz2ViE+wviJEUYce6NU5pn6I1X3A== Received: (from jbker@juno.com) by m15.nyc.untd.com (jqueuemail) id KTEJDLM6; Thu, 19 May 2005 18:26:11 PDT To: flyrotary@lancaironline.net Date: Thu, 19 May 2005 19:30:41 -0400 Subject: Re: [FlyRotary] Re: MAP measurement Message-ID: <20050519.212511.304.11.JBKER@juno.com> X-Mailer: Juno 5.0.33 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_1635.4c71.003c X-Juno-Line-Breaks: 8-6,7,16-19,25-26,31-33,34-32767 From: WALTER B KERR X-ContentStamp: 11:5:568561061 X-UNTD-Peer-Info: 127.0.0.1|localhost|m15.nyc.untd.com|jbker@juno.com This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_1635.4c71.003c Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Rusty wrote: So, if you had a perfect intake, you would measure the same pitot pressure inside the runner, as you would read ambient static pressure at the inlet to the TB. Since the TWM TB apparently has an excellent "static" style port, I'm only seeing part of the picture, which makes it look like my intake is lousy. Would you agree with that test? If so, I can pull one of the plugs out of an injector port on the TWM, and install a pitot tube that reaches down into the air stream temporarily for testing. That would end up about the same location as the stock MAP port on the TB. --------------------------------------- By Golly, I think you have it. I would be careful putting a hard pitot that might get into your new engine. A simple small soft plastic line inserted somewhere in your runner with a 45-60 degree camfer on the end will measure most of the pressure we are trying to prove is there. Just make sure the largest opening in the cut off line is looking upstream at the incoming runner's air from the T/B. That is the way I'm measuring mine and am showing 29.7 when ambient was probably 30. This was during the early part of a take off roll. Have not had the backbone to do a WOT flyby a few feet off down the field to see if I am capturing any of the potential pressure generated by the airspeed of the aircraft. Bernie, are you going to make Slobvovia Flyin? ----__JNP_000_1635.4c71.003c Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable

Rusty=20 wrote:

So, if you = had a perfect=20 intake, you would measure the same pitot pressure inside the runner, = as you=20 would read ambient static pressure at the inlet to the TB. Since= the=20 TWM TB apparently has an excellent "static" style port, I'm only = seeing=20 part of the picture, which makes it look like my intake is=20 lousy. Would you agree with that test? If so, I = can=20 pull one of the plugs out of an injector port on = the=20 TWM, and install a pitot tube that reaches down into the air stream = temporarily=20 for testing. That would end up about the same = location as=20 the stock MAP port on the TB.

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By Golly, I think you have it. I would be careful putting a=20 hard pitot that might get into your new engine. A simple=20 small soft plastic line inserted somewhere in your runner with a 45-60= =20 degree camfer on the end will measure most of the pressure we are = trying to=20 prove is there. Just make sure the largest opening in the cut off line is=20 looking upstream at the incoming runner's air from the T/B.

That is the way I'm measuring mine and am showing 29.7 when = ambient=20 was probably 30. This was during the early part of a take off roll. Have = not had=20 the backbone to do a WOT flyby a few feet off down the field to = see if=20 I am capturing any of the potential pressure generated by the airspeed of = the=20 aircraft.

Bernie, are you going to make Slobvovia Flyin?

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