Bottle Rocket B

Cheesy Pie
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Re: Bottle Rocket B

Postby Cheesy Pie » May 9th, 2011, 7:57 pm

Rockets either fall apart, land out of reach, or land in reach and intact. No inbetweens.
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Jimean716
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Re: Bottle Rocket B

Postby Jimean716 » May 10th, 2011, 1:17 pm

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 :P
I had about 45%.
Same here :D
Our secret is putting in 22.5%. I know it sounds insane, but we did some testing on our rockets. In one scenario, the rocket started leaking slightly, and launched with only about 20% water left.

We got a new best time. We even shot it past the fence and into the 2 acre woods behind our school. We found it about 700 ft. away and the tip had been completely crushed, probably on impact. :mrgreen:
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Re: Bottle Rocket B

Postby Tramsarran » May 10th, 2011, 2:02 pm

Using 22.5% water, how long did you manage to keep it in the air?
Goodbye Science Olympiad, until next year.

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chlorine kills
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Re: Bottle Rocket B

Postby chlorine kills » May 10th, 2011, 2:17 pm

Has anyone found the perfect balance of strength and lightness? I made a glider that worked perfectly, but it didn't get high enough... so it ended up not doing well.
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Cheesy Pie
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Re: Bottle Rocket B

Postby Cheesy Pie » May 10th, 2011, 4:21 pm

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 :P
I had about 45%.
Same here :D
Our secret is putting in 22.5%. I know it sounds insane, but we did some testing on our rockets. In one scenario, the rocket started leaking slightly, and launched with only about 20% water left.

We got a new best time. We even shot it past the fence and into the 2 acre woods behind our school. We found it about 700 ft. away and the tip had been completely crushed, probably on impact. :mrgreen:
What was your time? And time doesn't matter if it was ruined.
100% of deaths are somehow caused by science.
Don't be a statistic.
Don't do science.

Naperville Central High School '17 :arrow: Michigan State University Physics '21
GO GREEN GO WHITE

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Re: Bottle Rocket B

Postby Tramsarran » May 10th, 2011, 5:53 pm

Not if you have the resources and knowledge to build someting very similar to or better than the ruined one.
Goodbye Science Olympiad, until next year.

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Re: Bottle Rocket B

Postby Cheesy Pie » May 10th, 2011, 6:43 pm

Yeah. These are my good rocket points, in order of importance

Stays Intact and Follows Construction Rules
Time/Design
Height
100% of deaths are somehow caused by science.
Don't be a statistic.
Don't do science.

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Re: Bottle Rocket B

Postby drifter601 » May 12th, 2011, 1:58 pm

what kind of launcher will they have at Nationals?????????????????????????????????

(ANY DIVISION C COMPETITORS MIGHT KNOW SINCE EGG-O-NAUT FROM LAST YEAR SHOULD USE THE SAME LAUNCHER.
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Re: Bottle Rocket B

Postby drifter601 » May 12th, 2011, 2:05 pm

What did the 30-second rockets look like? Don't worry; I'm not going to Nats.
The most effective design this year has been the backslider which will always (if it is a working backslider) be a fairly long (or super long) bottle rocket that is as lightweight as possible with the center of balance put halfway in between the center of pressure and center of lateral area. However, there may be some adjustments to adapt the rocket to certain weather conditions.

Edit: Never mind. I misread the question.

How do you find the center of pressure, and the "lateral area" means the lateral area of just the cone, right????????
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Re: Bottle Rocket B

Postby drifter601 » May 12th, 2011, 2:06 pm

Oh no!!! :o , the chance of precipitation in Nationals (saturday) is ........
60%!!!!!!!!!!! AAAAAHHHHH!!!!!!!

wind: from E at 10mph
Humidity: 58%
UV Index: 5 Moderate
Sunrise: 5:29 CT
High: 68 F


according to weather.com ;)
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Cheesy Pie
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Re: Bottle Rocket B

Postby Cheesy Pie » May 12th, 2011, 4:04 pm

One: it will impact other rockets, not just yours.
Two: don't triple-post.
100% of deaths are somehow caused by science.
Don't be a statistic.
Don't do science.

Naperville Central High School '17 :arrow: Michigan State University Physics '21
GO GREEN GO WHITE

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Re: Bottle Rocket B

Postby fishman100 » May 12th, 2011, 4:58 pm

The last time i checked weather.com, it said that there was a 50% chance of precipitation when I was going to an amusement park.

It was sunny all day :P So I wouldn't rely on the weather reports just yet, maybe wait until a few days before the competition.
Langley HS Science Olympiad '15

Cheesy Pie
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Re: Bottle Rocket B

Postby Cheesy Pie » May 12th, 2011, 5:00 pm

At regs I think it was either raining or saining (snow+rain).
100% of deaths are somehow caused by science.
Don't be a statistic.
Don't do science.

Naperville Central High School '17 :arrow: Michigan State University Physics '21
GO GREEN GO WHITE

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Re: Bottle Rocket B

Postby Littleboy » May 12th, 2011, 5:01 pm

current meteorologists - as unaccurate as can be
meteorologists in 20 years (people currently in meteorology) - way more accurate

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Re: Bottle Rocket B

Postby Cheesy Pie » May 12th, 2011, 6:23 pm

My Fossils partner: You dont have to outrun the bear, just the other people.
100% of deaths are somehow caused by science.
Don't be a statistic.
Don't do science.

Naperville Central High School '17 :arrow: Michigan State University Physics '21
GO GREEN GO WHITE


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