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Date: Tue, 13 Sep 2011 06:20:17 -0400
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Subject: Re: [LML] Re: Figuring out the pressurization system IV-P , and checking for leaks on the ground
From: John Hafen <j.hafen@comcast.net>
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Dico:  My favorite way to find leaks on the ground is to fire up a good =
Monte Christo and have someone outside looking for smoke.

Doesn't always work, but at least you get to enjoy a good cigar.

Cigars can be used for navigation as well.  You have to do a route in =
VFR conditions a few times, and figure out just where you are on the =
cigar before it is time to descend.  With practice, at the right point =
on the cigar, you can descend through the deck to your desired air =
patch.

John


On Sep 12, 2011, at 6:34 PM, Dico Reijers wrote:

Hi Brent,

Thanks for your reply on the IV-P pressurization.  I found it quite =
helpful and informative as I figure out the pressurization system. =20

=46rom my limited testing so far (flying at 10-12k), I've noticed that =
the pressurization isn't linear.  At 10k my cabin altitude (according to =
the indicator) is 5k and the PSI is perhaps 2 or 2.5 differential...  =
since the POH suggests a 8000' cabin at FL220... I am surprised that I =
can climb an additional 12k and have the cabin altitude only rise an =
additional 3k.  I was flying at 31" / 2500.

How do you check for leaks on the ground?

thanks,

Dico