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I want to build a medieval war machine scaled down to be about 6 feet tall as a fun project, and I'm wondering if I should go with a trebuchet or a catapult design. I'm leaning toward catapult because I don't think trebuchets would scale down as well because the counterweight would be limited, but I think catapults are likely to be more complex in terms of proper building materials and maybe more dangerous if the shitty modern lumber fails under tension and explodes. Anyone here have any valuable insights?
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8 comments:
Butttoucha9k on scored.co
14 days ago 5 points (+1 / -0 / +4Score on mirror ) 1 child
Trebuchet
 

Trebuchet at that scale wouldn't need some of the more complex parts like a winch unless you wanted to add it. You could build it and manually reset it at that weight and size. Also its a more elegant display of physics.
User1488 on scored.co
14 days ago 1 point (+0 / -0 / +1Score on mirror ) 1 child
Yeah, I think you're probably right. I do think I would have a much easier time building a trebuchet and having it actually work versus a catapult. The forces at work are much easier to see and intuitively understand, if that's what you mean by an elegant display.
Butttoucha9k on scored.co
14 days ago 1 point (+0 / -0 / +1Score on mirror )
Catapults are like a bow. Stress and potential energy. Trebuchet work with centripetal forces, gravity, and arc dynamics. Super neat.
CharcoalWyrm on scored.co
14 days ago 2 points (+0 / -0 / +2Score on mirror )
"I'm leaning toward catapult because I don't think trebuchets would scale down as well because the counterweight would be limited ..."

My friend built a one to two foot trebuchet and it worked reasonably well, although he had to use lead weights to make the counterweight powerful enough, so your concern is not invalid.
JesusSupporter33 on scored.co
14 days ago 1 point (+0 / -0 / +1Score on mirror )
I think I'd go catapult but yeah.. A lot can go wrong. You can look up the strength properties of different wood online. Normal lumber stores like home depot mostly carry 2 types of dimensional lumber, SPF and SYP depending on where you're located. DEFINITELY avoid SFP.
GoneViking on scored.co
14 days ago 1 point (+0 / -0 / +1Score on mirror )
Axe handles are generally made from ash or hickory because they are durable but flexible enough to deal with the shock axe handles endure. For the same reason you'd probably want to make the throwing arm out of ash or hickory. Your best bet is probably finding a wood mill that sells rough cut lumber, or maybe find a tree service place. Those guys often have saw mills to make use of the many trees they cut down.
Vlad_The_Impaler on scored.co
14 days ago 0 points (+0 / -0 )
i tried scaling down my impalements. sometimes impaling someone on a 30ft long pike is very difficult, especially if we lack all the ropes pulleys and manpower we require. So in a pinch i impale someone on shorter pikes. The shortest one i've used is about 8ft but that's not a very good impalement. I'd go for 16ft poles if that is what is handily available in lumber supply mills. You might try finding out who supplies your local utility company with their utility poles and then retrofit / taper them for the purpose of impalement.
14 days ago 0 points (+0 / -0 )
trebuchet for the reasons you listed
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