the carbon monoxide indicator thing...

DKirkpatrick

New member
Hello. Two experienced pilots got very mysteriously killed here in Arkansas about a month ago. Good airplane, two good pilots. I've never used one of those panel mount cards that is supposed to indicate high carbon monoxide.
Question is, are these good, reliable, the best indicator? This problem can sneak up on you, especially in cold weather flying of course.
Would like some best practices type comment.
thanks
dan
 
Tarrow said:
At less that 25-30 ppm you’re not likely to see any noticeable effects, looking at CO absorption.
I believe anything under 70 is usually considered safe for fairly long exposure.

In my 69 Cardinal, I see 16-20 with the vents closed up. Drops close to zero when I turn on the cabin heat. Not at all what I expected given that I was checking for leaks from the muffler.
 
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