Frans
Ignore me VSI is static to static not static to free air.
Pete
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Frans Veldman
Sent: 24 June 2013 15:53
Subject: Re: Europa-List: Misreading altimeter, TWICE!
On 06/24/2013 04:29 PM, Richard Iddon wrote:
> The only thing I can think of which might have a bearing is that I
> normally connect the pitot to the static line when I am away to stop
> spiders crawling up there but I can't see how that can affect
> anything.
If your system is leak free, the instuments will receive quite a jolt
when you disconnect the pitot from the static after the ambient pressure
has been changed. Such a jolt can easily damage the gear in the altimeter.
It is best to incorporate a small leak, just a pinhole in the connecting
tube, to keep the pressure similar to the outer pressure.
Frans
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