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A home-school project encompassing understanding many things- history, engineering, physics, ballistics and yes, wood working. Also some fun. :)

Our projectiles are typically marbles. They seem to combine the best combination of size and weight. We have broken the 100' distance a couple times but about 85' is the norm. Eight pounds is the most weight used.

The string wrappings are functional to help hold things together where the throwing beam is pierced for the trunnion. There were no plans, the design was our own based upon several working examples and largely influenced by "War Wolf" a BBC sponsored attempt to recreate a full sized trebuchet from history.

I believe the design needs improved. The counter weight seems to just drop down with a jerk rather than swinging an arc. I believe the frame needs to be taller and more length of beam from trunnion to counter weight pivot.

There is one neat thing, the engine creaks with rubbing wood making it sound more like a massive machine. I believe the sound is the by-product of some binding in the build. It is held together by toothpick 'pegs' and the bindings. Wood is a collection mostly of pine scraps but some pieces of hickory. The counterweight basket is made of that.

Anyway, it was fun building it with the boys and we enjoy 'shooting' it. By the way, "Mammoth" is just what we named it and some one day, a considerably larger, say, about a 6' high frame, is in the works. Should be fun!

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Pretty cool. Looks like fun.
 

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Nice. I want to make one of these one of these days. Just to business playing catch up now but maybe later on. You need a great job
 

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Nice looking trebuchet.
The jerky drop may be due to binding in some of the pivots. Maybe opening up the holes for more clearance may make it smoother!!................Jim

Hal, I looked at the records this year and 3800 and something was the best. Didn't they have one go over 4000 one year?
 

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Great build. I am almost done with a 6' foot design for tennis balls and water balloons. My son's scout pack will use it on our camps to toss water balloons. It should be able to hold 100# of counter weight, though 40 to 50 should be enough for balloons.



Mostly 2X construction, bolted together to help with transport.

Have fun. Try making the sling a little longer.
 

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Punkin Chunkin is a blast! Watching that is loads of fun!

You know, I hadn't thought of making the sling longer over all. We'll give that a try. We did add the chain links so we could adjust the trajectory. One link can lower it from a nice low angle shot to a high angle lob.
 

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cool
 

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This looks like a fun project. Great job! I'm filing this one away so that one day, I can build one with my boys…..
 
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