The banner image shows a cam with a flat follower. Cams are used to convert rotary to linear motion. As the cam rotates, the follower rises and falls: Abrupt changes in the cam’s velocity results in large accelerations and cause the follower to jerk or chatter. In operating machinery, that is not a good thing, butContinue reading “CAMMING ACTION”
Tag Archives: James Keating
JO NAGE
Jō Nage is using the jō to throw an opponent. But it is not an offensive technique. Throwing with a jō is weapon retention. Furthermore, I have shown that the use of the jō in Aikido is more closely related to bayonet than it is to staff work. Review 8 Count Kumijo Because weapon workContinue reading “JO NAGE”
KNIFE WORK
My initial attraction to martial arts was through the weapons as artifacts. I was entranced by the beauty of the swords at the Boston Museum of Fine Arts.[1] I still covet and collect weapons but the pragmatist in me knows this is a servile and dangerous affliction. The importance isn’t the tool, it is theContinue reading “KNIFE WORK”
Protective Arts 