Return-Path: Received: from fep04-mail.bloor.is.net.cable.rogers.com ([66.185.86.74] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2971674 for flyrotary@lancaironline.net; Mon, 02 Feb 2004 19:19:28 -0500 Received: from CR754193A ([24.43.221.42]) by fep04-mail.bloor.is.net.cable.rogers.com (InterMail vM.5.01.05.12 201-253-122-126-112-20020820) with ESMTP id <20040203001630.MCOM435777.fep04-mail.bloor.is.net.cable.rogers.com@CR754193A> for ; Mon, 2 Feb 2004 19:16:30 -0500 From: "Neil Kruiswyk" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Linear Position Transducer? Date: Mon, 2 Feb 2004 19:19:41 -0500 Message-ID: <001c01c3e9eb$6b2db5d0$6402a8c0@CR754193A> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001D_01C3E9C1.8257ADD0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2616 In-reply-to: Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Authentication-Info: Submitted using SMTP AUTH LOGIN at fep04-mail.bloor.is.net.cable.rogers.com from [24.43.221.42] using ID at Mon, 2 Feb 2004 19:16:30 -0500 This is a multi-part message in MIME format. ------=_NextPart_000_001D_01C3E9C1.8257ADD0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I'm with Bill on the standard round pot. but. just put a bellcrank on the pot shaft and a small push rod to connect the bellcrank to the moving manifold.. Neil -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: February 2, 2004 1:37 PM To: Rotary motors in aircraft Subject: [FlyRotary] Linear Position Transducer? 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 ------=_NextPart_000_001D_01C3E9C1.8257ADD0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I’m with Bill on the standard = round pot… = but… just put a bellcrank on the pot shaft and a = small push rod to connect the bellcrank to the = moving manifold..

Neil

---= --Original Message-----
From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson
Sent: February 2, 2004 = 1:37 PM
To: Rotary motors in = aircraft
Subject: [FlyRotary] = Linear Position Transducer?

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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