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Interesting that the 337 and the Cherokee Six had almost identical sound levels, whereas the 182 was about 14 decibels quieter. The 337 was the only piston twin in the study. It would have been more informative to see it compared against its direct competition. You can't say "we have some of the noisiest aircraft" when there were no other light twins tested. And when a Piper single can match us in loudness...LOL! Of course the jets they tested were on a whole different chart because they were so much louder than the pistons!
Last edited by mshac : 09-02-20 at 08:49 PM.
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