Originally Posted by Richard Martin
You're leaving out the effects of gravity. Since the blade is moving strictly in a horizontal plane to gravity it cancels the effects of gravity out.
Try stopping the Corvette and then try stopping the semi. It takes significantly more force to stop the 82,000 pound semi then it does to stop the 3,100 pound Corvette. It's called inertia.
" Inertia is the resistance of any physical object to a change in its state of motion or rest, or the tendency of an object to resist any change in its motion. It is proportional to an object's mass."
The heavier blade has more inertia due to it's increased mass.
The thing to remember is the real working force is above that heavy B6 blade,where the working inertia is developed,then transferred to crankshaft and that heavy mass blade absorbs a lot of the transferable working torque that inevitable requires more HP in keeping the same blade speed of a lighter blade at a given RPM. I would rather have a lighter blade backed up by higher engine RPMs where by maximum blade tip speed can be achieved, combined with inertia energy in the blades to overcome the absorbency of power from over grown grass,does this make any sense
Engine response time from being bogged down will always be quicker too.
Heavier masses below the crank increases engine stress and causes abnormal wear of the engines internal parts,let alone wear on deck parts. More cons than pros I think.