Trebuchet v3

[Dr_Strangelove]

Ok, I posted v2 in the temp forums, but for those of you who missed it, check it out here:

http://www.jeremycox.com/stuff/trebuchet/

This is v3 after 1 day of cutting and 1 day of assembly:

 

[Shrap]

Nice job man ! What are your expectation for the range ?

 

[Neddaf]

Nice man...

 

[das_ben]

Someone make a chart that shows the growth of your projects and a projection of how large your trebuchets will be in three months!

 

[w00p]

sweet.
That was a far throw.
Could you like put it in the middle of the road and fire water melons? Would like to see the result of the projectile

 

[fist_mlrs]

trebuchets are evil (i started to work at mine today )

 

[Dr_Strangelove]

hehe, I think this will be my last (at least largest). Anything bigger would require a hell of a lot more work.

I have no idea at all what to expect with this one, but I hope to get about 100yds... no idea what I will throw.

 

[das_ben]

I hear kids have pretty good aerodynamics...

 

[fist_mlrs]

the do, they do

 

[anaemic]

jeremy i think you need to get a job

 

[Dr_Strangelove]

jeremy i think you need to get a job

hehe, would you believe that I have two? They obviously were not filling my trebuchet building needs .

This is mostly a weekend and after hours hobby.

btw, the arm is almost done. I will see about posting pics later.

 

[UncleOsmov]

Jeremy, how tall it it to the axle? By the looks of it your main supports and the axle light be too small. Ours used 6x6"s as supports and a 2.5" pipe for the axle. Our arm broke with about 450lbs. of ballast. It was 3 2x4"s in an "I-beam" formation. Just a heads up

 

[EtherRex]

thats nice man, good luck with it, i wish i had the time....

 

[Dr_Strangelove]

Jeremy, how tall it it to the axle? By the looks of it your main supports and the axle light be too small. Ours used 6x6"s as supports and a 2.5" pipe for the axle. Our arm broke with about 450lbs. of ballast. It was 3 2x4"s in an "I-beam" formation. Just a heads up

The axel is about 5' 6". I am using a single 2x4" on each side, but they are hemlock rather than pine (I assume that is what you used). I am using a 3/4" metal rod as the axel (different than in the pic). Should be at lest as strong as a pipe, and the hole in the supports are smaller.

The arm is a 2x4" with two more 2x4"s on each side continuing about half way out the arm.

I only expect to use about 300 pounds of counterweight and throw smallish objects. But who knows.

 

[UncleOsmov]

thats what we said

 

[Dr_Strangelove]

hehe, I will keep that in mind.

Can you post the pics of yours again? I hope to test mine tomorrow.

 

[Dr_Strangelove]

I have no idea how much weight I have in the box, but it is almost full. A few hundred pounds. So far I have been throwing croquet balls a few hundred feet.

 

[UncleOsmov]

here it is!

 

[Freon]

pfffffff jeremy, you call that a trebuchet


time to start trbuchet 4