Mailing List lml@lancaironline.net Message #43859
From: Craig Berland <cberland@systems3.net>
Sender: <marv@lancaironline.net>
Subject: [LML] favorite pressurization debug techniques
Date: Thu, 30 Aug 2007 15:37:08 -0400
To: <lml@lancaironline.net>
Colyn wrote:  I've developed a pressurization problem.
So far the best debug method I know of is to hook a vacuum exhaust up to the cabin inlet, and get inside with something that smokes and watch where the smoke goes.
Anyone want to nominate a more effective, or less flammable approach? 
 
I can tell you what NOT to do.  When I was at General Motors, I used a chemical "smoke" flare to run a visual test to determine air flow through an intake manifold that I modified with a plex-i-glass top.  After the engine seized and the lab exhaust stack was plugged with red smoke, the 55 gallon drum containing the smoke flare starting leaking into the test lab.  Man those things make a lot of smoke. Let's just say I spent a lot of time with the security and plant safety folks.  I have to honestly say it stills brings a smile to my face when I remember the red smoke incident.
 
Stick with the Cuban smoke generators.
 
Craig Berland
 
 
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