3 ms·
I guess using a linear output stage instead of a PWM would help avoid detection. Or use a plane instead of a quadcopter, to limit the noise.
by nraynaud 12y ago
I guess using a linear output stage instead of a PWM would help avoid detection. Or use a plane instead of a quadcopter, to limit the noise.
- mafuyu 12y agoI've found it's the propellers themselves that cause the noise, not the PWM junk on the motors.
- jonathantm 12y agoOr glide/dive from a high altitude?
- ck2 12y agoIt's the same reason they can make helicopters only so quiet, moving that much air with sharp edges is loud. They poured a fortune into making "stealth" or even just quieter helicopters without much success.