Storm the Castle B

[brobo]

So apperently CW's are too expensive for our school to buy just to do a few tests... is anyone else having this problem? If so, what are you using as CW's?

Currently we were able to borrow a team mate's pencil bag and fill it with some wieghts so that it is exactly 1kg, then we took two plastic bags and filled them with wieghts so that they are both 1kg each. Then to make the pencil bag 1kg, all you have to is put one or both of the plastic bags into it. It seems pretty accurate, but is there a better way?

[starpug]

So apperently CW's are too expensive for our school to buy just to do a few tests... is anyone else having this problem? If so, what are you using as CW's?

Currently we were able to borrow a team mate's pencil bag and fill it with some wieghts so that it is exactly 1kg, then we took two plastic bags and filled them with wieghts so that they are both 1kg each. Then to make the pencil bag 1kg, all you have to is put one or both of the plastic bags into it. It seems pretty accurate, but is there a better way?

You can't make counterweights yourself with ABS or PVC pipe filled with some sort of weight to 1 kg?

[mr popper70]

Yes there are many possible counterweights.....If money is not an issue go to home depot or any hardware supply store and buy 8ft. of the thickest chain.... have them cut the eight/th and keep the broken links...u will have 9 links of 7 and 9 broken links.....if u have a tight budget try large catfish weights "i think they are like 8-16oz. and are about 2-3$ a piece"

[Anatprof77]

Would you recommend I use the typical fat trebuchet? Do you have any other designs I could suggest to the others at my school to try out?

[brobo]

Would you recommend I use the typical fat trebuchet? Do you have any other designs I could suggest to the others at my school to try out?

A FAT trebuchet will work the best because the counterweight falls straight down instead of in an arcing motion. Most likely any other better designs you'll find will violate the energy rule, and I bet the proctors will be picky about that. I would just stick with a FAT if I were you.

[[PRMS]savage24x]

quick question! is there a specific distance where the 20cmx20cm open top cube will be?

[Friedoyster3]

quick question! is there a specific distance where the 20cmx20cm open top cube will be?

thats what you decide you place the box, they give you the projectiles and the CW

[Anatprof77]

Would you recommend I use the typical fat trebuchet? Do you have any other designs I could suggest to the others at my school to try out?

A FAT trebuchet will work the best because the counterweight falls straight down instead of in an arcing motion. Most likely any other better designs you'll find will violate the energy rule, and I bet the proctors will be picky about that. I would just stick with a FAT if I were you.

Thanks for the help.

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[Anatprof88]

Hey guys,
Would you suggest I use a pouch for my fat or something more sturdy.
I was thinkin of a soup ladle.

[brobo]

Hey guys,
Would you suggest I use a pouch for my fat or something more sturdy.
I was thinkin of a soup ladle.

Use a sling. It's traditional, more reliable, and you can also have many slings of different lengths.

[ichaelm]

Hey guys,
Would you suggest I use a pouch for my fat or something more sturdy.
I was thinkin of a soup ladle.

Use a sling. It's traditional, more reliable, and you can also have many slings of different lengths.

By reliable, do you mean accurate? In my experience, using a sling has be much less accurate than a sturdy cup, just because of all the variables involved in a sling.

[starpug]

Hey guys,
Would you suggest I use a pouch for my fat or something more sturdy.
I was thinkin of a soup ladle.

Use a sling. It's traditional, more reliable, and you can also have many slings of different lengths.

By reliable, do you mean accurate? In my experience, using a sling has be much less accurate than a sturdy cup, just because of all the variables involved in a sling.

While a sling can lack accuracy, it definitely will get you more distance then a simple cup. I may be wrong, but I believe this is because the way it lengthens the arm. That may not be why but, regardless there is a reason that medieval trebuchets used slings and not cups

[ichaelm]

Use a sling. It's traditional, more reliable, and you can also have many slings of different lengths.

By reliable, do you mean accurate? In my experience, using a sling has be much less accurate than a sturdy cup, just because of all the variables involved in a sling.

While a sling can lack accuracy, it definitely will get you more distance then a simple cup. I may be wrong, but I believe this is because the way it lengthens the arm. That may not be why but, regardless there is a reason that medieval trebuchets used slings and not cups

Actually, I was still thinking of the rules for trajectory, where you had to be as accurate as possible and hit a fairly close distance that was set by the event supervisors. So yeah, you're right. Distance matters a lot more than I thought.

[wlsguy]

Other than receiving outside assistance, what does everyone think constitutes a “competition violation” which would get you 2nd tiered?

I don’t think they are the same things as “Penalties” since these already covered and have their own point deduction (3 points)

I have submitted a clarification but wanted to see if maybe I was missing something obvious.

[AlphaTauri]

Arguing with the judges when they're clearly right and you're clearly wrong? I don't think there's much in the way of competition violations for any building event.

Edit: Or perhaps some part of the trebuchet sticks out of the launch area after launch (but everything fit in the 75cm cube before launch, therefore avoiding the construction violation)?