Storm the Castle B

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Re: Storm the Castle B

Postby pokegman » March 1st, 2011, 6:34 am

It specifically says in the rules that the center of gravity must not drop in the launch, so angling the rails
would be illegal. What we did to keep our arm from coming off the track was to put washers and pins on the ends of the falling bar that falls through vertical guides if that makes sense.
So I guess we need to redo the guides then. Our fall bar isn't the problem (the first thing we did was secure that in place w/ washers and pins). Our wheels just always roll backwards without the counterweight BECAUSE of the weight of the fall bar so we're just going to add weight to the end of the arm to even it out.

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Re: Storm the Castle B

Postby mtheleman » March 2nd, 2011, 12:13 pm

I was at Thomas Jefferson Middle School's regional toady and they had a 2.222 kg CW and a 41.6g projectile. They had placed their target at what I'm guessing to be somewhere for 17-20 meters (granted they were plagued with a bout of 3 miss fires and ended up launching the ball backwards on all three shots). The point is is that if you can come close to that distance you should be set for most regionals if not most state competitions.
Saturday there was a team that placed the target at 22 meters and over shot it all three throws. 3kg cw and 40 gram projectile.
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Re: Storm the Castle B

Postby Friedoyster3 » March 2nd, 2011, 4:17 pm

I was at Thomas Jefferson Middle School's regional toady and they had a 2.222 kg CW and a 41.6g projectile. They had placed their target at what I'm guessing to be somewhere for 17-20 meters (granted they were plagued with a bout of 3 miss fires and ended up launching the ball backwards on all three shots). The point is is that if you can come close to that distance you should be set for most regionals if not most state competitions.
Saturday there was a team that placed the target at 22 meters and over shot it all three throws. 3kg cw and 40 gram projectile.
Do you happen to know if this was the farthest placed target and also, what kind of trebuchet did they use?
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Re: Storm the Castle B

Postby mtheleman » March 3rd, 2011, 6:39 am

I was at Thomas Jefferson Middle School's regional toady and they had a 2.222 kg CW and a 41.6g projectile. They had placed their target at what I'm guessing to be somewhere for 17-20 meters (granted they were plagued with a bout of 3 miss fires and ended up launching the ball backwards on all three shots). The point is is that if you can come close to that distance you should be set for most regionals if not most state competitions.
Saturday there was a team that placed the target at 22 meters and over shot it all three throws. 3kg cw and 40 gram projectile.
Do you happen to know if this was the farthest placed target and also, what kind of trebuchet did they use?
That was the farthest throw that I have seen this year. I was helping run the event on Saturday. I also ran it in a January competition. It was a floating arm design painted pink. I think the color choice may have given them the edge.
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Re: Storm the Castle B

Postby Friedoyster3 » March 3rd, 2011, 1:41 pm

That was the farthest throw that I have seen this year. I was helping run the event on Saturday. I also ran it in a January competition. It was a floating arm design painted pink. I think the color choice may have given them the edge.
Yeah because that seems to be a decent trebuchet, but I have seen way better. Also, would you agree that usually one mabey two floating arms show up to competition especially at the regional level?
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Re: Storm the Castle B

Postby adithyabigal » March 3rd, 2011, 3:59 pm

Our regional competition didn't have StC event, so I don't know what increments the supervisors will use to measure the counterweight. Any help? :?:

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Re: Storm the Castle B

Postby penclspinner » March 3rd, 2011, 5:54 pm

Our regional competition didn't have StC event, so I don't know what increments the supervisors will use to measure the counterweight. Any help? :?:
Er what? The event supervisors will provide the counterweights for you to use. The counterweight can range from 1 - 3 kg. I'd imagine that for ease of use you'd get 1,2,3 kg masses or potentially 1.5 or 2.5 kg masses simply because these masses come as a single counterweight. That help?

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Re: Storm the Castle B

Postby brobo » March 3rd, 2011, 5:55 pm

Our regional competition didn't have StC event, so I don't know what increments the supervisors will use to measure the counterweight. Any help? :?:
Er what? The event supervisors will provide the counterweights for you to use. The counterweight can range from 1 - 3 kg. I'd imagine that for ease of use you'd get 1,2,3 kg masses or potentially 1.5 or 2.5 kg masses simply because these masses come as a single counterweight. That help?
Our invitationals had some really odd number like 2.365.... don't bet on a nice number.
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Re: Storm the Castle B

Postby Slothface » March 3rd, 2011, 6:39 pm

Since my arm is unstable with a counterweight attached to it, I've built a box to hold the counterweight. Is this allowed, because it may contribute more power to the launch?
Yeah, i am wondering the same. Our counterweight fell Off cause it wasn't an actual hook. We were going to make a sling/pouch to hold the counterweight so we read the rules and it didn't say no but I would make it detachable just in case it's not allowed. :)

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Re: Storm the Castle B

Postby brobo » March 3rd, 2011, 6:52 pm

Yes, you are allowed to use a basket/bucket/box as long as it doesn't violate the Energy Rule.
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Re: Storm the Castle B

Postby mtheleman » March 4th, 2011, 6:50 am

Our regional competition didn't have StC event, so I don't know what increments the supervisors will use to measure the counterweight. Any help? :?:
Er what? The event supervisors will provide the counterweights for you to use. The counterweight can range from 1 - 3 kg. I'd imagine that for ease of use you'd get 1,2,3 kg masses or potentially 1.5 or 2.5 kg masses simply because these masses come as a single counterweight. That help?
Our invitationals had some really odd number like 2.365.... don't bet on a nice number.
I believe that is why you are supposed to have a calculations sheet. That way you can calculate distances between what you actually tested.
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Re: Storm the Castle B

Postby mtheleman » March 4th, 2011, 6:52 am

That was the farthest throw that I have seen this year. I was helping run the event on Saturday. I also ran it in a January competition. It was a floating arm design painted pink. I think the color choice may have given them the edge.
Yeah because that seems to be a decent trebuchet, but I have seen way better. Also, would you agree that usually one mabey two floating arms show up to competition especially at the regional level?
About half of the devices were floating arms.
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Re: Storm the Castle B

Postby pokegman » March 4th, 2011, 1:07 pm

With 1 kilogram of counterweight and 55 gram projectile we were able to go about 6.1 meters. When we went any higher with the CW, we hit the ceiling! (we were practicing in the hallway) So you think this is a good distance?

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Re: Storm the Castle B

Postby penclspinner » March 4th, 2011, 3:30 pm

Our regional competition didn't have StC event, so I don't know what increments the supervisors will use to measure the counterweight. Any help? :?:
Er what? The event supervisors will provide the counterweights for you to use. The counterweight can range from 1 - 3 kg. I'd imagine that for ease of use you'd get 1,2,3 kg masses or potentially 1.5 or 2.5 kg masses simply because these masses come as a single counterweight. That help?
Our invitationals had some really odd number like 2.365.... don't bet on a nice number.
Since my arm is unstable with a counterweight attached to it, I've built a box to hold the counterweight. Is this allowed, because it may contribute more power to the launch?
Yeah, i am wondering the same. Our counterweight fell Off cause it wasn't an actual hook. We were going to make a sling/pouch to hold the counterweight so we read the rules and it didn't say no but I would make it detachable just in case it's not allowed. :)
Yeah the reason why I mentioned the nice, rounded kg values was because those are the standardized masses that come in a normal mass set, are a single counterweight and have attached hooks.

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Re: Storm the Castle B

Postby fleet130 » March 4th, 2011, 4:38 pm

The last time I ran this event I just added a hook to a scrap piece of 6in diameter (round) steel bar stock. The total mass was something like 1863.567 kg (I actually measured to 4 decimal places and rounded to 3).

Edit: Just a small typo! I typed kg instead of g. It should be 1863.567 g.
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