Pronounce it "ott-lottle"
THE ATLATL RESEARCH OF BOB PERKINS
Bob Perkins of BPS Engineering has been interested in atlatl and dart mechanics for decades. BPS engineering claims credit for four major and half a dozen minor discoveries in the field, virtually all that is known of the deceptively complicated mechanics of the system. I'm pleased to be able to present Mr. Perkins papers on Atlatl mechanics as part of The History and Primitive Technology Page. 
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ATLATL AND DART MECHANICS
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ATLATL WEIGHTS: Function and Classification
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EFFECTS OF STONE PROJECTILE POINTS AS MASS IN THE ATLATL SYSTEM
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