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Re: Storm the Castle B

Posted: April 26th, 2011, 12:35 pm
by Singh1997
Thanks, I hopefully will finish tonight then. At the moment, our farthest launch is only about 11-12 meters, and our launch at regionals, only about 6 meters, got us fourth, as we knew how to adjust it. Still though, that was only with 2 floating arm trebuchets, both placing ahead of us. I assume for states, the CW will be relatively low, probably 1-2 kg, so I was hoping to be able to get something 17-20 meters. That would be ideal, and according to my research, that shouldn't be too difficult with tuning, which I am quite familiar with, after building 2 trebuchets by myself.

Re: Storm the Castle B

Posted: April 26th, 2011, 1:12 pm
by Tramsarran
At NY States the counterweight was either 2.3kg or 2.5kg; I think it was the latter but I'm not so certain. 11-12 meters is quite good compared to what my partner's trebuchet can get. The arm we used was really heavy as it was just carved out of wood. Out of curiosity, how does your arm look like and can you post a picture of the trebuchet to the gallery? I never got a good look at a trebuchet that gets good distance and all that I observed from States was that the ones with really light arms did well. Didn't notice any major differences between them because I was too lazy to look carefully.

Re: Storm the Castle B

Posted: April 26th, 2011, 2:04 pm
by 124113
Okay, so here's the thing, YOU CAN'T USE CATAPULTS. They use alastic enery, not potenial. Mabye you just did a type-o, but you said catapult twice. For the arm you could use metel.
Tramsarran wrote:At NY States the counterweight was either 2.3kg or 2.5kg; I think it was the latter but I'm not so certain. 11-12 meters is quite good compared to what my partner's catapult can get. The arm we used was really heavy as it was just carved out of wood. Out of curiosity, how does your arm look like and can you post a picture of the trebuchet to the gallery? I never got a good look at a catapult that gets good distance and all that I observed from States was that the ones with really light arms did well. Didn't notice any major differences between them because I was too lazy to look carefully.

Re: Storm the Castle B

Posted: April 26th, 2011, 7:52 pm
by wlsguy
Singh1997 wrote:....I assume for states, the CW will be relatively low, probably 1-2 kg, so I was hoping to be able to get something 17-20 meters. ....
In Ohio, they are running Storm in the French Fieldhouse. 46' ceiling and more than enough distance for ANY counterweight.
In 2006~2007 the counterweight was 1.2kg and the ball was something like 25g. 2nd place shot ~17m
In 2007~2008 the CW was 2.5kg and the ball was around 45g. 5th place shot ~23m

I guess I'm recommending you be prepared for any counterweight / projectile combination

Re: Storm the Castle B

Posted: April 27th, 2011, 3:52 am
by Singh1997
Interesting, thanks for that information about Ohio in the past few years. The only wheels I could find for the arm were

http://www.google.com/products/catalog? ... CE0Q8gIwAg#

Would those be ok for the arm? I was looking for smaller, but they were the only ones I could find.

Re: Storm the Castle B

Posted: April 27th, 2011, 7:24 pm
by Tramsarran
124113 wrote:Okay, so here's the thing, YOU CAN'T USE CATAPULTS. They use alastic enery, not potenial. Mabye you just did a type-o, but you said catapult twice. For the arm you could use metel.
Tramsarran wrote:At NY States the counterweight was either 2.3kg or 2.5kg; I think it was the latter but I'm not so certain. 11-12 meters is quite good compared to what my partner's catapult can get. The arm we used was really heavy as it was just carved out of wood. Out of curiosity, how does your arm look like and can you post a picture of the trebuchet to the gallery? I never got a good look at a catapult that gets good distance and all that I observed from States was that the ones with really light arms did well. Didn't notice any major differences between them because I was too lazy to look carefully.
Oops. I constantly make this mistake because my partner is always calling the device a catapult along with many other people who saw it or heard about Storm The Castle but didn't participate in it. I don't know what type of wood he used for it but it definitely wasn't light.

Re: Storm the Castle B

Posted: April 28th, 2011, 3:42 am
by Singh1997
If you're still wondering, for the arm, I used probably a 3/4 inch poplar square, and I reinforced the CW arm with sheets of metal, to make sure wood did not break. Extremely light arm that can hold 3 kilos no problem, but isn't too heavy for the lighter CW.

Re: Storm the Castle B

Posted: April 28th, 2011, 9:01 am
by Bennett
Those of you going to state this weekend/ April 30th,for Wisconsin good luck and I will see you there!

Re: Storm the Castle B

Posted: April 30th, 2011, 10:26 am
by havenguy
Yes! We got 3rd in this STC at states!

Re: Storm the Castle B

Posted: April 30th, 2011, 4:41 pm
by confusedhuman
I just wanted to know if i could add weight to my arm(the side with the cw on it). It doesnt break the energy rule does it? I mean as long as the arm doesnt launch without the cw it should be fine right? Since adding weight is just like making the sling arm thinner or making the part with cw bigger... right?