Return-Path: Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 762263 for flyrotary@lancaironline.net; Sun, 27 Feb 2005 22:56:53 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=sqpilot@bellsouth.net Received: from [216.78.114.193] by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20050228035608.GVTQ1997.imf16aec.mail.bellsouth.net@[216.78.114.193]> for ; Sun, 27 Feb 2005 22:56:08 -0500 Received: from 127.0.0.1 (AVG SMTP 7.0.300 [266.5.0]); Sun, 27 Feb 2005 21:55:56 -0600 Message-ID: <00c301c51d49$673e2030$43734ed8@paul52u7f5qyav> From: "Paul" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Weber Mixture control Date: Sun, 27 Feb 2005 21:55:54 -0600 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original Hi, Ken thanks for the information. I did save a similar message that you previously sent describing how you used ram air to control the mixture on your Weber. If required, I could probably construct a similar system (If I pestered you with a few more questions). I was just hoping there was a simple solution, such as someone who came up with a mechanical lever type mixture modification for the Weber. I could easily weld or machine a slot in the mixture adjustment screw and attach a cable, but I suspect that the mixture screw would need to be turned in or out several turns, which a simple lever attached to the mixture screw would not accomplish. It might possibly turn the mixture screw 1/2 to 3/4 turn at max, which I suspect would not be sufficient enough to lean the carb enough for higher altitude. Thanks again for your input. I have also saved this posting just in case. sincerely, Paul Conner ----- Original Message ----- From: "Ken Welter" To: "Rotary motors in aircraft" Sent: Sunday, February 27, 2005 9:00 PM Subject: [FlyRotary] Re: Weber Mixture control > I have mentioned this before but in case you missed it here it is again. > I control my mixture on my Weber with an air ram, the two ram tubes > are set about an inch away from the velocity stacks and the float > bole vent is to the side and below the stacks so when the ram is > opened it changes the pressure difference between the float bole and > the Venturi thus leaning out the fuel mixture. > In cruise I can open the ram until the rpm peaks and then when it > drops I know that I am on the lean side of peak and the close it > until it peaks again for the best power. > Also note that my plane only cruises at about 100 mph so you guys > with a faster plane will get more ram effect and more leaning effect, > on my plane the leaning lever is wide open at 16,000 ft > Ken -------------------------------------------------------------------------------- >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 266.5.0 - Release Date: 2/25/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 266.5.0 - Release Date: 2/25/2005