Thread: Brain trust question about lead projectiles
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otto_kretschmer otto_kretschmer is offline
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Join Date: Jun 2010
Location: Arizona
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engineers arguing about a golf ball..



BMW put dimples/vortex generators on their System helmets in the 80s and it probably worked but I have not seen any helmet on the market with them since
Old 08-12-2014, 10:54 PM
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