4 ms·

You either get a chop-chop-chop, or a bzzzt, both incredibly loud. It's not the engine that makes the noise, it's mostly the propeller/rotor. The only advantage

You either get a chop-chop-chop, or a bzzzt, both incredibly loud. It's not the engine that makes the noise, it's mostly the propeller/rotor. The only advantage of electric VTOLs is easier manufacturing and better control.

dr_dshiv 4y ago
> You either get a chop-chop-chop, or a bzzzt Well, for instance, if they could line up the harmonics to create a missing fundamental (eg with the addition of external sounds), they could make propellers present an artificially lower pitch.
- Judgmentality 4y ago
  Your solution to them being too loud and annoying is to make them louder and hopefully less annoying?
  - dr_dshiv 4y ago
    Yes. It’s possible that louder but less annoying is more viable, wouldn’t you say?
    - vkou 4y ago
      I would say the most viable solution is to not subject hundreds of thousands of people to an incredible amount of noise pollution, so that a couple of playboys get to skip a taxi ride to the airport. Private-transport helicopters or equivalents have no place in cities. The gain is in no way worth the cost.
      - savingsPossible 4y ago
        To complement that: they are only viable because they are heavily subsidized by the suffering of city dwellers. If you placed the cost of air pollution on the bill, they'd be much more expensive. Its not just unreasonable because the person flying gets less utility that is otherwise lost. It is also an unfair form of theft.
marcosdumay 4y ago
There is plenty of space to change the number of propellers, total area, and rotational velocity and change the sound profile of the plane. There is also a lot of space on how you maneuver it on the landing and take-out, so you make less sound when it matters the most. There is the entire thing about minimizing weight too, that also reduces sound, but it's also not clear how much can be done. Overall, it's not clear at all how much noise the eVTOL planes will make.
detritus 4y ago
Props need feathers.

dr_dshiv 4y ago

> You either get a chop-chop-chop, or a bzzzt Well, for instance, if they could line up the harmonics to create a missing fundamental (eg with the addition of external sounds), they could make propellers present an artificially lower pitch.

Judgmentality 4y ago
Your solution to them being too loud and annoying is to make them louder and hopefully less annoying?
- dr_dshiv 4y ago
  Yes. It’s possible that louder but less annoying is more viable, wouldn’t you say?
  - vkou 4y ago
    I would say the most viable solution is to not subject hundreds of thousands of people to an incredible amount of noise pollution, so that a couple of playboys get to skip a taxi ride to the airport. Private-transport helicopters or equivalents have no place in cities. The gain is in no way worth the cost.
    - savingsPossible 4y ago
      To complement that: they are only viable because they are heavily subsidized by the suffering of city dwellers. If you placed the cost of air pollution on the bill, they'd be much more expensive. Its not just unreasonable because the person flying gets less utility that is otherwise lost. It is also an unfair form of theft.

marcosdumay 4y ago

There is plenty of space to change the number of propellers, total area, and rotational velocity and change the sound profile of the plane. There is also a lot of space on how you maneuver it on the landing and take-out, so you make less sound when it matters the most. There is the entire thing about minimizing weight too, that also reduces sound, but it's also not clear how much can be done. Overall, it's not clear at all how much noise the eVTOL planes will make.

detritus 4y ago

Props need feathers.