I saw a discussion like this on Paleo planet where the spindle whorl and atlatl weight thing was discussed for pages. They brought up great information. Take a trip over and search the atlatl posts to learn more.
Larry Kinsella has experimented with these in a lot of fascinating ways. He has made them from igneous and slate rocks using abo procedures. He even published a paper on the effect of bannerstones on an atlatlist's arms. The Bannerstone: A Prehistoric, Prey-Specific Artifact Designed for Use in the Eastern Woodlands of North America" is now published in "Ethnoarchaeology: Journal of Archaeological, Ethnographic, and Experimental Studies Vol. #5, Number 1, April 2013.
In that study he worked with some physiologists who showed a hunter using a bannerstone atlatl had less muscle fatigue associated with holding the dart in a pre-launch position. All hunters know that holding still for long periods can be agonizing and cause muscle fatigue and shakes. Could they help with that. Larry's research indicates they can so we can't rule that out.
Larry has also won the World Atlatl Association distance competition with an atlatl that had a bannerstone on it. He competed against others who used "bannerstone-less" atlatls. Please don't misunderstand me to say they are are superior. I am just saying they can perform. again you can't rule them out for this.
I think the Indian Knoll Kentucky burials are worth investigating. If you look at the burials you find atlatl hooks, handles and bannerstones in their original positions. This occurs not once, not twice but multiple times showing this was how they were arranged.
That is very convincing evidence for me. Bannerstones in context in an environment that preserved some details.
Part of figuring something out is determining can it work. So far I see evidence on both sides of this discussion that show bannerstones CAN function as spindle whorls or on atlatls. I have not heard a convincing functional point to rule out either.
Obviously, I am in the atlatl camp on this one. Bannerstones disappear with the advent of the bow and I am 100% certain the demand for woven material never went away in the Woodland or Mississippian periods. If anything they went up. Demand for cord and fabric persisted well until the Protohistoric period. Then you see a move away from woven garments but not a total elimination. If bannerstones were indeed a spindle whorl they why abandon them? into the Woodland transition? That is simply a logical argument and not one based on harder facts.
I think experiments on both sides of the fence help figure what is possible and what can work. anyone passionate about bannerstones should read up on them and try things out for themselves.
I once thought some things about atlatl function that I now don't; thanks to new evidence. I keep an open mind and ask others to dig in and do the same.
Zuma, keep doing what you are doing.
Respectfully,
A. J. Hendershott
AKA Swamp Monkey