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Re: How legal are tension springs?
I don't think that tension springs are necessary. Surgical tubing is essentially the same thing, but with a feel-good squishiness that will make your life better. Plus, it's free in the KOP!
We did a quickie catapult test yesterday using two loops of surgical tubing stretched 2 feet. It launched the ball with about 4 feet of loft. By doubling up the tubing, we should be able to get the necessary height on our next try.
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--David Forbes
Mentor, Bit Buckets team 4183. Assistant cat herder and dispenser of legendary tales.
Need a Nixie watch? Yes, you do. Ask me.
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