rcman50166 wrote:Well me and Ken have discussed this via e-mail already. My vote is for a cannon. I know more about that than trebuchets/catapults/ballistas.
I support my decision with size as well. The trebuchet will be very large and heavy. What I see in my mind is having a close to 12 ft throw arm which means the base needs to be around 6ft tall, 12ft long, and 12ft wide at the least. We would definitely need the trailer to haul the monster. If made of wood I don't see how we are going to move it around either. Wheels are an option but we still need to get it out of the shop somehow once built. A cannon on the other hand is relatively small. It would have a 10 ft+ barrel but can be taken apart in smaller sections. The width and height would be a minimal issue. This would make it easily transportable.
Another issue brought up is safety. Both machines have its dangers. The trebuchet is large and heavy. It has a giant throw arm that has a long projected travel. Along with this it has a counterweight that will probably be close to 200+ lbs. The cannon does not have any exposed moving parts but it would be under pressure. A bit under 300psi. The only threat with this is not an exploding chamber, most pressure rated vessels have a safety factor close, if not exceeding 2. The main issue is an exploding barrel. If the barrel isn't perfectly straight the mass of the pumpkin traveling down it would whip the barrel causing it to shatter.
I have a few plans for the cannon if it is decided to be used. But that can be discussed another time
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