|
thought experiment:
It has previously been mentioned, cordless drills are very low power. A cordless drill will move a car, how long do you have to wait while it does so?
Enough gear reduction and the cordless drill will move a truck. Through a drivetrain horsepower is relatively constant disregarding losses. The force that moves a car is not horsepower, it is torque. Enough gear reduction and the cordless drill has sufficient torque, but it's power cannot be increased through gear reduction.
The video of the metro being moved by a cordelss drill is neat, but it sounded as if the drill was running at full speed. I think I can reach a destination by walking there faster, easier, and cheaper.
I'm too lazy right now look up the specifics, but lets assume the drill can produce 1/4 hp (optimistic) to move the average car at highway speeds this would require as many as 80 drill motors (20 hp).
|