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1500 Nm / 49 kg = 30 .6 Nm/kg.This is even more impressive than the SP260D, which hits 20 Nm/kg.Clearly we are now heading towards diminishing returns, because the motor mass fractions for practical vehicles will be small, but it's really impressive.RE the City Airbus rotor shrouds, I think that they are intended to protect against collisions, much like a Fenestron helicopter tail rotor. I don't really understand how they're going to make it quiet, but it's possible that they have a higher noise target than we think, or that they are taking lots of credit for masking by background urban noise.
1500 Nm / 49 kg = 30 .6 Nm/kg.
This is even more impressive than the SP260D, which hits 20 Nm/kg.
Clearly we are now heading towards diminishing returns, because the motor mass fractions for practical vehicles will be small, but it's really impressive.
RE the City Airbus rotor shrouds, I think that they are intended to protect against collisions, much like a Fenestron helicopter tail rotor. I don't really understand how they're going to make it quiet, but it's possible that they have a higher noise target than we think, or that they are taking lots of credit for masking by background urban noise.
