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Do you know how much the bridges weighed?

bernard wrote:

JonB wrote:

Ripplestar wrote:Weight: 3.38
Load: 8.2 kg
Score: 2426
Division: B

The highest score last year was just under 5000, so we may see 5500.

What was the score of 1st at Nats? Not many teams (a minority OF the minority) get those scores if I remember correctly. Granted, I am in Div C, but I still do not remember seeing those scores for B.

National Tournament 2015
Division B: 4906, 4336, 3891, 3469, 3397, 3288
Division C: 3694, 3580, 3246, 2633, 2537, 2466, 2456

Got it. Yeah, I do not think we will see 5500. That would be... improbable. Not impossible, but that's a big jump.

What kind of design was it?

What design did you use for your bridges, I am trying a K truss but what did you use?

I tried a K-truss before. It is an awesome design, my bridge held 37 POUNDS and wasn't even BOWING!!!!! The only thing is, they are pretty heavy. Mine weighed 42.5 g.

brayden box wrote:I tried a K-truss before. It is an awesome design, my bridge held 37 POUNDS and wasn't even BOWING!!!!! The only thing is, they are pretty heavy. Mine weighed 42.5 g.

Did you use balsa, or bass? 42.5 grams is pretty heavy for a k-truss bridge. Mine was around 7 grams.

brayden box wrote:I tried a K-truss before. It is an awesome design, my bridge held 37 POUNDS and wasn't even BOWING!!!!! The only thing is, they are pretty heavy. Mine weighed 42.5 g.

Paraphrasing someone from a previous year's thread (I don't remember who), the ideal bridge is one in which all members simultaneously collapse at 15kg. Your bridge has a lot of dead weight.

Unome wrote:

brayden box wrote:I tried a K-truss before. It is an awesome design, my bridge held 37 POUNDS and wasn't even BOWING!!!!! The only thing is, they are pretty heavy. Mine weighed 42.5 g.

Paraphrasing someone from a previous year's thread (I don't remember who), the ideal bridge is one in which all members simultaneously collapse at 15kg. Your bridge has a lot of dead weight.

Also keep in mind what type of efficiency you want. The maximum efficiency a ~40g bridge can have is around 300. Do you want an efficiency of 1000? Then the most your bridge can weigh is 15000/1000 or 15 grams.

Yeah, my score was really low on that one. It was my first bridge i had ever built, i built it two years ago. It was out of bass.

Also, i made it way too big. It was about 3 inches longer than the minimum length.