Return-Path: Sender: (Marvin Kaye) To: flyrotary@lancaironline.net Date: Mon, 02 Feb 2004 15:13:22 -0500 Message-ID: X-Original-Return-Path: Received: from wb2-a.mail.utexas.edu ([128.83.126.136] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP-TLS id 2971161 for flyrotary@lancaironline.net; Mon, 02 Feb 2004 13:57:25 -0500 Received: (qmail 80545 invoked from network); 2 Feb 2004 18:57:23 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO benefits3.mail.utexas.edu) (146.6.191.101) by wb2.mail.utexas.edu with RC4-SHA encrypted SMTP; 2 Feb 2004 18:57:23 -0000 X-Original-Message-Id: <5.1.1.5.2.20040202125637.024fa5e8@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 X-Original-Date: Mon, 02 Feb 2004 12:57:16 -0600 X-Original-To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Linear Position Transducer? In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_247460453==.ALT" --=====================_247460453==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Ed, Could you use something like this... http://mpja.com/productview.asp?product=14579+RS Mark S. At 01:36 PM 2/2/2004 -0500, you wrote: >Hi Guys, > > I am finishing up the design and fabrication of my variable length > EDDIE intake and need some assistance. I want to use a voltmeter (or > LEDs) to indicate the postion of the manifold. The simplist approach > would appear to have a linear resistor attached such that its arm is > moved as the manifold moves thereby changing the resistance indicating > distance. > >I've done a lot of Web surfing and found a number of linear postion >potentiometers. The problem is they cost more than I have invested in the >manifold. Regular audio linear potentiometers do not have the mechanical >range I need. I need a position indictor that has at least 5 1/2 - 6" of >travel. Anyone have any ideal where something reasonably priced might be >found. > > If you know of a retail catalog that have such things I'd appreciate a > pointer. I can find plenty of Linear Postion Potentiometers - but they > cost in the hunderds of $$. Need something much cheaper. > >I know I could devise a 3:1 lever ratio or some such thing and use one of >the cheap (but mechanically range restricted) linear potentiometers for >audio circuits, but would rather not. > >Thanks > > >Ed Anderson >RV-6A N494BW Rotary Powered >Matthews, NC --=====================_247460453==.ALT Content-Type: text/html; charset="us-ascii" Ed,
Could you use something like this... http://mpja.com/productview.asp?product=14579+RS

Mark S.

At 01:36 PM 2/2/2004 -0500, you wrote:

Hi Guys,

I am finishing up the design and fabrication of my variable length EDDIE intake and need some assistance. I want to use a voltmeter (or LEDs) to indicate the postion of the manifold. The simplist approach would appear to have a linear resistor attached such that its arm is moved as the manifold moves thereby changing the resistance indicating distance.

I've done a lot of Web surfing and found a number of linear postion potentiometers. The problem is they cost more than I have invested in the manifold. Regular audio linear potentiometers do not have the mechanical range I need. I need a position indictor that has at least 5 1/2 - 6" of travel. Anyone have any ideal where something reasonably priced might be found.

If you know of a retail catalog that have such things I'd appreciate a pointer. I can find plenty of Linear Postion Potentiometers - but they cost in the hunderds of $$. Need something much cheaper.

I know I could devise a 3:1 lever ratio or some such thing and use one of the cheap (but mechanically range restricted) linear potentiometers for audio circuits, but would rather not.

Thanks

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC

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