3 ms·

How so? The only difference is prop size, you seldom hear the motors of helicopters. Only the blade chop.

• Retric 9y ago
  They only use vertical takeoff to get up to speed or when landing. In flight it's just as loud as a normal single engine aircraft which are generally quieter than a car at ground level.
  • Kluny 9y ago
    Yeah, but that's exactly when the noise is most annoying for everyone else.