Re:The Death and Life of Helicopter Commuting [video]
by mannykannot on Wednesday August 30, 2017 @07:24PM
(#15136958)
A lot of the noise of helicopters comes from the rotor, and there is little more that can be done about it. Electric rotorcraft are not likely to be as quiet as their promoters like to suggest (e.g. through animations with unrealistic sound tracks), regardless of the number of rotors.
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Re:The Death and Life of Helicopter Commuting [video]
by ratsbane on Wednesday August 30, 2017 @08:52PM
(#15137328)
A significant part of the noise comes from the antitorque (tail) rotor, which is much smaller and typically turning ~3x as fast as the main rotor. There are several solutions to minimizing this noise, including ducted tail rotors and NOTAR https://en.wikipedia.org/wiki/NOTAR