When noodling the chain teeth seem to have an extended period of fiber grab, thus the longer shavings. Crosscutting shortens the fiber grab cycle between rocking back and forth on the heel/raker as it cuts.
I might have a high speed video footage to show...if I can find it.
Bart, crosscutting and ripping are very different and the dynamics of how the chain responds are very different because of the fiber characteristics of the wood in those two different scenarios.
The chain tooth does porpoise as it cuts otherwise you'd end up with chips the length of the log you are cutting. As the chisel bites the tooth rocks back on it's heel until the raker stops the bite and it rocks forward. Rinse and repeat over and over.
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