Our first catapult used a mouse-trap for the launching mechanism. It launched items smaller than a couple of inches. Our results from our second testing day are below...



Our second catapult was larger and made fully out of individual parts-- nothing compound.
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To hold the launching arm in place, we placed a holding stick here...
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We had a launching arm, but it did not launch consistantly so we removed it...
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We originally planned to go exactly by this plan... It did not turn out that way. We chaged our plan to have a more sturdy form and base.
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We only had one item that was capable of being launched--the wooden dowel--it did not launch consistently, so we could not record the results...