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Old 10-30-2018, 12:02 PM   #16
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Originally Posted by fatlazyless View Post
They need to take those three helicopters back to the dealer where they bought them, and get the mufflers fixed, because those mufflers aint working right. Does it even have a muffler? How loud ....... like very very very loud ..... easily heard from a mile away while inside the house .... must be extremely loud from inside the helicopter while flying that they cannot hear themselves think?

Surreptitious stealthy flying ...... not like this!
Actually FLL the noise generated from those is mostly coming from the rotors contact with the air as they rotate and create turbulence. The engines themselves are "relatively" quiet in comparison. The size, shape, speed and carrying load have direct effects on the sound they produce. This is why their sound is so distinctive as well. There have been advances in engineering to reduce the overall noise of the blades as they interact with the air around them.

I've actually ridden in the Navy's version of the H-60 on several occasions and it's not that bad with ear muffs on and the side doors closed.
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