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WebThe trebuchet made by order of Napoleon III., and described in his ' Etudes sur l'artillerie,' had an arm 33 ft. in length with a counterpoise of 10,000 lbs. weight to work it. This machine projected a 50 lb. cannon-ball 200 yards, … http://www.redstoneprojects.com/trebuchetstore/mobile/tp3_golf_ball_trebuchet.html calculating water softener capacity
Step by Step, Easy to Build, Tabletop Medieval Trebuchet Plans …
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