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There's a startup in my area that are working on an electric helicopter: http://volocopter.com/ http://volocopter.com/ - they use 18 rotors, probably because bi
by lorenzhs 10y ago
There's a startup in my area that are working on an electric helicopter: http://volocopter.com/ http://volocopter.com/ - they use 18 rotors, probably because bigger motors get heavy really quickly, but also for redundancy.
- green7ea 10y agoI believe that they use many small motors instead of a big one because quadcopter like planes are controlled by changing blade speed and that bigger blades have much more inertia which limits the speed at which the rotation can bee accelerated. Helicopters spin their blades at a constant speed and vary the angle of attack of the blades to obtain the same control which means it is less affected by inertia.