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Originally Posted by RamZ
What's a ballast used for? I've heard the word when talking about trebuchets, is that what it's used for.
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noun
noun: ballast; plural noun: ballasts
1.
heavy material, such as gravel, sand, iron, or lead, placed low in a vessel to improve its stability.
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Or potentially, in this case, to improve traction.
Note in FRC if you are using lead as a ballast it must be encapsulated and at no time should you shave, cut, drill, grind or intentionally do anything that could create lead particles or dust. It also can not be an additional battery even if it is not electrically connected to the robot.