Originally Posted by Bashby
I think if a mower would cut better with 3-4 blades that it would have the same effect to have a standard blade spin 3-4 times faster. It would make more sense to change the gear ratio to get the blades to spin faster than to have tri/ quad blades to me.
Actually the effect would be quite different. With a standard blade spinning 3-4 times faster, danger from anything struck would be much higher. Energy imparted to a struck object would be greater, and ejection velocity much higher.
At the same rotational speed, a blade with 4 edges will give two times the exposure as will a standard 2 edge blade in the same period of time.
I'm not sure but I think there is a legally mandatdated for blade speed.