From: BOBPAS26@aol.com
Message-ID: <14.1e2cc1d.260bcd7b@aol.com>
Date: Thu, 23 Mar 2000 14:41:47 EST
Subject: Position Sensors
To: lancair.list@olsusa.com
Mime-Version: 1.0

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Re: Need a reliable position sensor for landing gear, etc. 

I just received a position sensor/indicator from Menzimer Aircraft Components 
(www.menzimeraircraft.com) to use as a flap position indicator on my Lancair 
IV-P. The components are well made and function well in the shop. The sensors 
are available in travel lengths from 0.5" to 1.2." Copied the idea from John 
Wright of Colorado Springs; his works very well with a LED indicator in the 
cockpit.

The position sensor was $30 but is not waterproof; the LED position indicator 
for the cockpit is $59. Not cheap, but better than some alternatives I've 
looked at, and the quality/construction is top notch.

If you need an indicator system showing the range of travel/intermediate 
positions, consider mounting one of these in a way to minimize exposure to 
the elements. It could be easily replaced if/when it failed, but I suspect it 
would provide reasonable life unless exposed to direct water spray, etc.  Of 
course if you only need to indicate "limit" positions (e.g. gear fully 
up/gear fully down), reed switches/sealed micro switches remain the most 
reliable/best alternative.

Bob Pastusek
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LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
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Please send your photos and drawings to marvkaye@olsusa.com.
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