Just to mention again, messing about with modern power tools can be damaging to your health.
And helicopters, too.
There's a fundamental difference between an electric motor being started (in a drill or elsewhere) then allowed to run "free".
A helicopter's rotor blades are constantly being pushed against the considerable resistance of the air.
The electric drill being used to actually drill a hole in a material, which will cause a resistance to the drill bit, therefore makes a better comparison.