<font color=blue>Anyway, I know that I'm always hearing griping out of these kids because the bars are always getting jammed up with long grass/weeds. Now I don't know if this is because of the kids lack of experience, or because the City waits too long to try to cut it. </font color=blue>
I would say it is either lack of experience, or lack of maintainence that would cause the jamming of the mower. Properly used and maintained, a sickle bar should have no trouble with tall grass/weeds. The sickle bar is probably the most used mower for cutting hay, even the cut/conditioners use a sickle bar to cut. If the blades are kept sharp and properly adjusted, and you don't try to mow too fast, it should mow just fine, even with tall thick grass. It actually requires less horse power than a comparable sized brush hog or finish mower as it is just cutting the grass at the bottom, rather than shreding it.
Just wanted to pass a little info on.