Main Discussion Area > Primitive Skills
Bannerstone Discussion
Zuma:
More photos of experiment.
Zuma:
last photos .
Buckeye Guy:
Looks like your getting there !
DC:
I can't seem to stop thinking about this but I really don't know anything about them. But anyway if the stone was to act as a flywheel a disc shape would be better although it would be harder to stop and start at the beginning and end of each stroke. Because of the thinness of the disc it would also be more difficult to get a lasting joint between the stone and the spindle. A spherical shape would concentrate the weight and would reduce the flywheel effect but would allow for a better joint with the spindle. The shield shape is weird. It reminds me of the governor from a clockwork motor. The fan effect would slow the thing although very slightly I think. It just bothers me that they would go to all that work (making the shield shape and drilling the long hole) when a sphere or a disc would be so much easier to make. I mean, if you want to drill a bunch of holes or start a fire would you care that much what the tool looked like. Maybe they had way more time on their hands than I think. Just a few thoughts, maybe not worth much.
JackCrafty:
If you move the banner close to the drill bit, I wonder if it would blow the drilling dust away?
Anyway, a wooden banner would do the same thing, but maybe the higher weight of the stone makes the whole drill more stable?
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