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Step 13The ballast
Make a little hook and tape to one of the batteries.
Use the rubber band to attach a whole bunch more batteries around the one with the hook
When they're all assembled and hooked on the arm make sure the ballast is not touching the base.
Use the rubber band to attach a whole bunch more batteries around the one with the hook
When they're all assembled and hooked on the arm make sure the ballast is not touching the base.
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Apr 5, 2011. 4:49 PMvenom1539
says:
and also, what size of batteries are those
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Apr 5, 2011. 4:49 PMvenom1539
says:
I've been trying to build a portable trebuchet so that i can bring it to school and shoot erasers during indoor recess but just having one is fine. Now i can shoot erasers at my friends when they come over.
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Dec 1, 2008. 6:21 PMmsavage15
says:
i love this project :0 lol!
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Dec 1, 2008. 6:13 PMmsavage15
says:
this is soo cool :) you r o c k !
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Jun 2, 2006. 5:05 PMnearo
says:
I think you mean that you aren't supposed to let the ballast touch the base, but heck! What do I know?
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