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Date: Tue, 13 Sep 2011 17:32:10 -0400
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From: "Bill Bradburry" <bbradburry@bellsouth.net>
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Subject: RE: [LML] Re: Figuring out the pressurization system IV-P , and checking for leaks on the ground
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That cigar smell will also help you find your plane on the ramp in the dark
if you have forgotten where you parked.  The downside is always having to
fly alone...or providing CPR upon landing!  :>)

Bill B

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of John
Hafen
Sent: Tuesday, September 13, 2011 6:20 AM
To: lml@lancaironline.net
Subject: [LML] Re: Figuring out the pressurization system IV-P , and
checking for leaks on the ground

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.  

From 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


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