The Chain Saw Is Not a Chain Saw

In this model, the chain did not rotate around a fixed bar or blade. This would be kind of like a gas powered garrot wire for a tree wthwith part of the machine itself nailed to the tree above where you were cutting. The book also mentions an issue of scientific american that had a cover boasting a giant chain saw bucking a huge fallen redwood. Allegedly, this thing could cut through a trunk of about ten feet in diameter in four and a half minutes.