Storm the Castle B

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Re: Storm the Castle B

Post by brobo » November 3rd, 2010, 11:57 am

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?
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Re: Storm the Castle B

Post by starpug » November 3rd, 2010, 1:16 pm

brobo wrote: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?
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Re: Storm the Castle B

Post by mr popper70 » November 3rd, 2010, 4:37 pm

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"

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Re: Storm the Castle B

Post by Anatprof77 » November 9th, 2010, 4:07 pm

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?

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Re: Storm the Castle B

Post by brobo » November 9th, 2010, 4:14 pm

Anatprof77 wrote: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. ;)
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Re: Storm the Castle B

Post by [PRMS]savage24x » November 11th, 2010, 12:24 pm

quick question! is there a specific distance where the 20cmx20cm open top cube will be?
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Re: Storm the Castle B

Post by Friedoyster3 » November 11th, 2010, 2:45 pm

[PRMS]savage24x wrote: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
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Re: Storm the Castle B

Post by Anatprof77 » November 11th, 2010, 3:18 pm

brobo wrote:
Anatprof77 wrote: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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Re: Storm the Castle B

Post by Anatprof88 » November 12th, 2010, 7:46 pm

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

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Re: Storm the Castle B

Post by brobo » November 12th, 2010, 7:56 pm

Anatprof88 wrote: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.
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