IronGoober
Interfector Viris Spurii
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...and now, No. 1, the larch...
Posts: 1593
California
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I think it has to do with stroke length. The amentum adds stroke length. For a given atlatl length, there is only so much acceleration you can do. Once the atlatl is vertical, it can't effectively accelerate the dart because the hook comes out of the back of the dart. But with the amentum, the atlatl can go beyond vertical and still be accelerating the dart. So maybe a long atlatl + amentum would work better than just a long atlatl. The question is, for an atlatl of say, 1 m, would a atlatl+amentum of 1m work better. That would be the best comparison I think.
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