Message-Id: <3.0.3.32.19981020220628.00d481b4@olsusa.com>
Date: Tue, 20 Oct 1998 22:06:28 -0400
To: lancair.list@olsusa.com
From: earl_schroeder@juno.com (Earl E Schroeder) (by way of Marvin Kaye <marvkaye@olsusa.com>)
Subject: Re: cowl vents, tank vents, capacitance gauges
Mime-Version: 1.0

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Hi,

I've given some thought to reflexing the ailerons on my 235/320.  I was
going to use a right/left hand screw jack in the connecting rod between
the control sticks...  I invisioned a sort-of trim wheel with a flexible
drive connecting to a sprocket on the screw jack..

Then I attended someone's forum at Oshkosh, and the possibility of
'flutter' from 'unloading' the ailerons scared me out of the idea..  I'm
no aero engr so I can't vouch for this being possible and I'm too old to
be a test pilot.  So I guess I'll settle with the standard config...

I also have installed home-made capacitance guages in my fuel tanks but
since I have yet to fly the thing, I can't confirm how well they may
work.  (I retired from GE with 25+ years of process control and used a
lot of cap probes etc so I think they will be OK.)  Most of my guages are
standard 4-20 ma stuff running on 24v DC so I used a standard industrial
cap transmitter.  Once you have the 4-20 ma signal, you can do most
anything with it... (alarm, track etc)  The probes are Jim Weirs copper
foil epoxied on both sides of a piece of prepeg with the center cleaned
out.  I used three in parallel... one on each end and one in the center
of each wing tank.  One in the center of the header tank.  I agree that
water will 'short' the probe and cause a false full tank display but this
is good.  The very high signal will drive the meter off scale with will
prompt one to drain off the water.  Normal full tanks would be never
display more than 100%.

Earl Schroeder
2103 Ford Rd
Mt Vernon, In 47620
812 985-3339

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