Today I put a some vacuum on my static system to check for leaks and had a big one. After isolating instruments one by one, I found that my Trutrak ADI won't hold anything. As I try to put a vacuum on it, I can actually hear the air going through it. What the hell?! Isn't this thing supposed to read vertical speed? It occurs to me that in a non-pressurized aircraft a guy could have a whopping-big leak in his static system and never even know it. I mean, when I put a vacuum on my static port, my altimeter registers the altitude but then indicates a rapid descent as the vacuum is lost through the ADI. If I were actually at altitude this wouldn't happen, so all would appear fine. Am I missing something here?
Steve Zicree
RV4 plumbing
Steve Zicree
RV4 plumbing
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