Bottle Rocket B

theging
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Re: Bottle Rocket B

Postby theging » January 3rd, 2012, 11:48 am

Last year, I used around 950 ml for my 2-liter launch. My best time was 32 seconds (unfortunately not in a competition!).
However, everyone has been talking about 1-liter bottles for this year. I am actually getting better times with smaller bottles (around 500 ml). I think the 1-liter bottle may be too heavy to be practical. With smaller sizes, (right now I'm using a 17 oz (502.8 ml) bottle) I think the lower mass of a bottle this size is an advantage. Even though it can't hold as much water (I launch at about 200 ml), I am getting better times with these light, narrow bottles than I am getting with the bigger, heavier one liter bottles. Plus, there is more variation in the smaller bottle sizes than with the bigger bottles. Essentially what I'm saying is it might be good to experiment with sizes OTHER than 1-liters and figure out what size is best for your individual rockets.

rishj09
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Re: Bottle Rocket B

Postby rishj09 » January 14th, 2012, 6:16 pm

Just a small question. Do you have to use a carbonated bottle?
:?:
yes you do :P :geek:
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sciencemom_1
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Re: Bottle Rocket B

Postby sciencemom_1 » January 18th, 2012, 8:44 am

Hi Everyone,

We are trying to coach bottle rockets for the first time. Can anyone please share their flight times? We are consistently getting about 17 secs. Is this on the low range, or this is what everyone else is also averaging about.

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fishman100
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Re: Bottle Rocket B

Postby fishman100 » January 18th, 2012, 12:38 pm

Hi Everyone,

We are trying to coach bottle rockets for the first time. Can anyone please share their flight times? We are consistently getting about 17 secs. Is this on the low range, or this is what everyone else is also averaging about.
17 seconds was probably the winning time at the VA State competition last year.

Of course, that was last year but 17 seconds is still a great start. (I haven't tested if I can get better flight times with a smaller bottle)
Langley HS Science Olympiad '15

A-Ro
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Re: Bottle Rocket B

Postby A-Ro » January 18th, 2012, 7:55 pm

Hi Everyone,

We are trying to coach bottle rockets for the first time. Can anyone please share their times? We are consistently getting about 17 secs. Is this on the low range, or this is what everyone else is also averaging about.
We have one that consistently gets 18.5 secs, but we're not done testing yet ;)
2011 Nationals: 3rd place Storm the Castle, 4th place Meteorology, 27th place Battery Buggy, 29th place Bottle Rocket

sciencemom_1
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Re: Bottle Rocket B

Postby sciencemom_1 » January 19th, 2012, 10:12 am

Thanks for your reply. It was very helpful. Hopefully our kids will learn and have fun at the same time for this event.

--[Grand]--
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Re: Bottle Rocket B

Postby --[Grand]-- » January 21st, 2012, 12:50 pm

What times have you guys have been getting?

TAZmaniandevil
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Re: Bottle Rocket B

Postby TAZmaniandevil » January 22nd, 2012, 4:03 pm

Hi! I am doing bottle rockets for the first time this year, and i was looking and saw that lots of people attached a long cone to the front of their rocket. I was wondering if anyone could please tell me what to make that cone out of. :D

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illusionist
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Re: Bottle Rocket B

Postby illusionist » January 22nd, 2012, 4:07 pm

Hi! I am doing bottle rockets for the first time this year, and i was looking and saw that lots of people attached a long cone to the front of their rocket. I was wondering if anyone could please tell me what to make that cone out of. :D
You should be able to make it out of poster board type stuff (thick paper).
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Rule 7d. "Event Supervisors are allowed to break any competitors' devices" -bearasauras

Skink
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Re: Bottle Rocket B

Postby Skink » January 22nd, 2012, 4:17 pm

Anyone use card stock?


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