Message-ID: <010801c18b8e$9afeeee0$8c00a8c0@john>
From: "John Barrett" <2thman@olympus.net>
To: "Lancair Mail List" <lancair.list@olsusa.com>,
	<ed.mccauley@bltinc.com>
Subject: Re: Implications of a HOT pitot tube
Date: Sun, 23 Dec 2001 00:48:32 -0800
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Reply-To: lancair.list@olsusa.com

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>I've remove so many layups with a heat gun
>that, when the pitot tube heater is on, I'm afraid that it will compromise
>the integrity of the resin.  If I forget to turn it off after an IMC decent
>hate to litter the taxiway)
(SNIP)

Ed,

A couple of thoughts re: the heat from the pitot tube.

First, I used Nylaflow in my IVP for the pitot line on the advice of Don
Goetz.  Haven't flown yet so I can't comment on your question.

My approach to the pitot tube question arises from experience in my  spam
can.  I've burned out the  heating element in  two pitot tubes due to
leaving the switch on inadvertantly.  The first time was because I didn't
know any better and the second was because I  apparently bumped the switch
to on and failed to realize it.  I don't think they are  repairable and they
ain't cheap.

I  plan an to have an automatic position on my three  position pitot switch
(ON-OFF-ON) that will allow the pitot heat to be operated by a thermostat.
I will also have an annunciator lamp that indicates  when the element is
actually on.

Regards,
John


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