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Message-ID: <1c23473f0707031428n55160edapb80be086eab2ac0e@mail.gmail.com>
Date: Tue, 3 Jul 2007 14:28:13 -0700
From: "David Leonard" <wdleonard@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: FW: Phase 1 completion
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>  The same approx. output indicates to me that the pressure transducers
> appear to be doing identical functions with changing altitude/ambient
> pressure.  So I would normally say the problem has to be down stream of the
> pressure transducer output, but I'm sure Tracy has chased that rabbit.  It
> is a puzzle
>


Al,

How did you go about measuring the output at different altitudes?  Did you
actually have wires running to some sort of ohmmeter while in flight?  Or
did you use a pressure chamber?  If pressure (vacuum) chamber did you have a
separate vacuum source on the manifold lines? Otherwise, you would not have
simulated altitude accurately.

With the diodes possibly causing interference, did you run a trial jumper
across the diodes and did that in fact fix the problem?  Otherwise you could
be barking up a long and tangled tree...

(I know, its a lot easier to ask questions than offer solutions  :-)

-- 
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

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<br><br>
<div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div lang="EN-US" bgcolor="white" vlink="purple" link="blue">
<div><font face="Arial"></font></div>
<div><font face="Arial"></font>&nbsp;</div>
<div><font face="Arial">&nbsp;The same approx. output indicates to me that the pressure transducers appear to be doing identical functions with changing altitude/ambient pressure.&nbsp; So I would normally say the problem has to be down stream of the pressure transducer output, but I&#39;m sure Tracy has chased that rabbit.&nbsp; It is a puzzle
</font></div></div></blockquote>
<div>&nbsp;</div>
<div>&nbsp;</div>
<div>Al,</div>
<div>&nbsp;</div>
<div>How did you go about measuring the output at different altitudes?&nbsp; Did you actually have wires running to some sort of ohmmeter while in flight?&nbsp; Or did you&nbsp;use a pressure chamber?&nbsp; If pressure (vacuum)&nbsp;chamber did you have a separate vacuum source on the manifold lines? Otherwise, you would not have simulated altitude accurately.
</div>
<div>&nbsp;</div>
<div>With the diodes possibly causing interference, did you run a trial jumper across the diodes and did that in fact fix the problem?&nbsp; Otherwise you could be barking up a long and tangled tree...</div>
<div>&nbsp;</div>
<div>(I know, its a lot easier to ask questions than offer solutions&nbsp; :-)</div>
<div>&nbsp;</div></div>-- <br>David Leonard<br><br>Turbo Rotary RV-6 N4VY<br><a href="http://N4VY.RotaryRoster.net">http://N4VY.RotaryRoster.net</a><br><a href="http://RotaryRoster.net">http://RotaryRoster.net</a> 

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