4 ms·
Is there any data on the sound profile of this thing? As the rotors become smaller the disc loading increases, making them much louder and more shrill. If that'
by frisco 9y ago
Is there any data on the sound profile of this thing? As the rotors become smaller the disc loading increases, making them much louder and more shrill. If that's effectively mitigated here, this looks really cool; if not, I think it will be hard to negotiate take off and landing rights with most communities.
- asterius 9y agoAs well as being higher pitched, contra-rotating designs also produce more noise. The sound field is non-uniform (mostly axial), and there are claims of being able to reduce it through special phasing of the two rotors, using different numbers of blades on each, etc. But I wouldn't be particularly hopeful.