Bottle Rocket B

[fishman100]

No, those aren't fun to watch. At states, I saw one that looked like a missel. It went up a few hundred feet and then strait down a few feet from where it was launched. It was loud.

Lol, that's what happened to our rocket today

But our 2nd one got ~27 seconds each time we launched it

[squash]

What amount of water is the best?
I seems that nearly 30% or 60% works well.
Thanks

[Cheesy Pie]

I think about 40%.

[Jocool]

I had about 45%.

[Cheesy Pie]

What time did you get?

[Jocool]

Terrible. Our best ever was 17 seconds. But more often, it was 12. It was just never able to do well, no matter how well we built it.

[fishman100]

What amount of water is the best?
I seems that nearly 30% or 60% works well.
Thanks

I would think 60% would be too much; we were told at a competition that 50% "looked like an awful lot of water." But then we won

I had about 45%.

Same here

[Cheesy Pie]

As Pressure increases, water does too.

[Jocool]

No, as water increases, pressure (in Bottle Rocket, this is) does not increase because the air pressure must remain a constant 75 psi.

[Cheesy Pie]

I mean, as the launch pressure increases, you should add more water.