Return-Path: Received: from tomcat.al.noaa.gov ([140.172.240.2] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 389116 for flyrotary@lancaironline.net; Wed, 01 Sep 2004 19:22:34 -0400 Received-SPF: none receiver=logan.com; client-ip=140.172.240.2; envelope-from=bdube@al.noaa.gov Received: from PILEUS.al.noaa.gov (pileus.al.noaa.gov [140.172.241.195]) by tomcat.al.noaa.gov (8.12.0/8.12.0) with ESMTP id i81NM4uB016498 for ; Wed, 1 Sep 2004 17:22:04 -0600 (MDT) Message-Id: <5.2.1.1.0.20040901191358.01a20100@mailsrvr.al.noaa.gov> X-Sender: bdube@mailsrvr.al.noaa.gov X-Mailer: QUALCOMM Windows Eudora Version 5.2.1 Date: Wed, 01 Sep 2004 19:20:33 -0600 To: "Rotary motors in aircraft" From: Bill Dube Subject: Re: [FlyRotary] Re: MAP filter In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed At 06:06 PM 9/1/2004 -0500, you wrote: >FWIW, I picked up a couple cheap, plastic fuel filters today, and will look >through my TIG and plasma parts to see if I can find a suitable restriction >to go along with it. On very high-end pressure gauges (like for a laboratory) they put a damping orifice on the inlet to keep pulses from damaging the movement. Instead of a simple pin hole, they use a hole with a wire through it. The gas flows though the space between the wire and the wall of the hole. The beauty of this approach is that you can make a very restrictive choke that does not clog easily. They use a short section of wire and they put a 90 degree bend in each end to keep it from slipping through the hole. Bill D. (Selling lots of LED Position lights http://www.killacycle.com/Lights.htm )