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At a recent tournament, the event supervisors were disqualifying teams with triggering pins (nails, etc.) that were pulled outside of the launch area. They cited rule 3.b which says, "The triggering device must not pose a danger due to flying parts or excessive movement outside the launch area....

I want to bring up an issue with the recent FAQ: CAN GRAVITATIONAL POTENTIAL ENERGY BE SUPPLIED BY THE PROJECTILE ITSELF OR MUST THE PROJECTILE BEGIN AT GROUND LEVEL BEFORE TRIGGERING? No, the projectile may not be a source of gravitational potential energy. Please review the "Examples of Energ...

How are cross section sizes accounted for? Suppose the minimum contact width set by the event supervisor is 6 cm and Div-B students put their bottom two attachment points at (0, -0.20, +0.06) and (0, -0.20, -0.06). Now suppose their cross-section sizes for the two main compression members at those t...

New Albany happened last Saturday.

Increasing the density of balsa wood drastically increases the strength. An 1/8" by 1/8" would be stronger than a 3/16" by 3/16" with the same weight because the density in the 1/8" by 1/8" is higher. Actually, it's opposite. For two sticks with the same weight , the s...

My thoughts as well. According to the rules there is a clear distinction between the "rocket", which must have a blunt nose, and the parachute, which must be attached to a ping pong ball.

fshhhh i got 471 and 7th place Dang! I thought you were going to be over 500 for sure! I also don't like the over emphasis on jumps, but those were the rules and they were the same for everyone. It really was a challenge to get consistent jumps with enough gap distance to win. I'm curious to see ho...

fshhhh i got 471 and 7th place Dang! I thought you were going to be over 500 for sure! I also don't like the over emphasis on jumps, but those were the rules and they were the same for everyone. It really was a challenge to get consistent jumps with enough gap distance to win. I'm curious to see ho...

kylg wrote:So you found that plastic bb's were better for you? Did they come perfectly round or did you have to sand them.

They were pretty round. The kids didn't sand them or anything. They just used them.