tis 03 dec 2019, 23:03#598745
You can look a delimbing in two different ways. Let's call the knives an "axe".
Delimbing method #1
is when we push the axe with raw force through the cross section of the limb
Delimbing method #2
is when we give the mass of the axe a certain velocity, inertia and kinetic energy, before it hits the limb. This way we rather need speed than raw force. This is how intermittent delimbing works.
Delimbing method #3
is when we let the entire tree including the limb to hit the axe.
The difference between #2
is that in #3
the effective kinetic energi and cutting power is much higher since it is a 2000+lbs tree moving. This is how continuous delimbing with roller feeder works ie regular harvester head.
So if the NIAB has an intermittent (ie going back and forth) delimbing arm, it will be more dependent on velocity than cylinder force.
Velocity of the mass is by far more important than linear force or rotating torque.
Man lär så länge man undervisar...