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Re: Bottle Rocket B
Posted: May 5th, 2011, 3:33 pm
by fishman100
Littleboy wrote: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
Re: Bottle Rocket B
Posted: May 5th, 2011, 6:48 pm
by squash
What amount of water is the best?
I seems that nearly 30% or 60% works well.
Thanks
Re: Bottle Rocket B
Posted: May 6th, 2011, 5:20 am
by Cheesy Pie
I think about 40%.
Re: Bottle Rocket B
Posted: May 6th, 2011, 8:03 pm
by Jocool
I had about 45%.
Re: Bottle Rocket B
Posted: May 6th, 2011, 8:04 pm
by Cheesy Pie
What time did you get?
Re: Bottle Rocket B
Posted: May 6th, 2011, 8:59 pm
by 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.
Re: Bottle Rocket B
Posted: May 7th, 2011, 6:12 am
by fishman100
squash wrote: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
Jocool wrote:I had about 45%.
Same here
Re: Bottle Rocket B
Posted: May 7th, 2011, 6:35 am
by Cheesy Pie
As Pressure increases, water does too.
Re: Bottle Rocket B
Posted: May 7th, 2011, 8:42 am
by Jocool
No, as water increases, pressure (in Bottle Rocket, this is) does not increase because the air pressure must remain a constant 75 psi.
Re: Bottle Rocket B
Posted: May 7th, 2011, 11:32 am
by Cheesy Pie
I mean, as the launch pressure increases, you should add more water.