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Hello, I'm a student pilot and I have been reading many of the books to get the flying skills in but I have found some contradictory information and I'm now more confused more than informed! :confused: The subject of my confusion is about the temperature decrease in the troposphere. I'm getting different values depending on the source. all the values are per 1000 feet. Cessna Pilot Center training (Kings): 2 degrees celsius 2.5 degress celsius Pilot's handbook of aeronautical knowledge 3 degrees celsius Does any one has an idea on the value that should be retained? The only case that I have seen these values used are for performance calculation and for clouds height determination and it seems to me that the 1 degree of separation is too significant to be considered negligeable. Of course the 2.5 is the less risky choice I guess... Any thoughts? comments? Frederik Delacourt
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