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robotman09 wrote:

Orchdork wrote:sorry to jump in, but I was wondering how long your bottle rockets airborne... sorry bout that...first year of bottle rockets and not much info...

The team I am coaching has had the best time so far of 20ish seconds

How do you do that? Our high is about 7 seconds. Which division do you coach?

Well it really depends on what design you are using before i make any major suggestions on increasing time.
Depending on what it does in the air one thing to do is make the rocket more aerodynamic.
It is only a B division event so that is what i am coaching

The change in shape rule applies for the entire rocket not just the outside right. That is what I thought but my coach is saying it is only for the outside.

yea I would read it as the entire rocket
and changing interior shape wouldnt do too much that I can see.

making it very stable on the way up and changing into a backslider going back down.
Guess whos rocket hit their coaches car and put a dent in it today? He was not very impressed.

Heey. I'm looking for a really good bottle rocket desigh to pwn all others at the regionals. Any ideas? ----- Geek Girl

Where will the Bottle Rocket event be held if it is snowing? Is it safe to launch in temperature below freezing? Can we put anything in the water to keep it from freezing? Our bottles have collapsed from changing temperatures ... wasn't the Challenger disaster 25 years ago?

Our first year at this, so I have tons of questions, and so do the kids.

Molly

I'm having a hard time coming up with ideas. Any ideas for Regional pwnage

MathLady wrote:Where will the Bottle Rocket event be held if it is snowing? Is it safe to launch in temperature below freezing? Can we put anything in the water to keep it from freezing? Our bottles have collapsed from changing temperatures ... wasn't the Challenger disaster 25 years ago?

Our first year at this, so I have tons of questions, and so do the kids.

Molly

Well it is possible to launch in the snow the only issue is when the launcher's safety freezes. I would have to say that each competition would make the decision on its own. I also don't think you would be allowed to add anything to the water

Cheesy Pie wrote:I'm having a hard time coming up with ideas. Any ideas for Regional pwnage

Read the Bottle Rockets Wiki

We are in MI so we have to launch in the cold (yes with a windchill of 0˚F the launcher does freezes up when wet). We just use hot water and that works for us to prevent it from freezing long enough.