Bottle Rocket B

Primate · Post by **Primate** » March 15th, 2011, 4:55 pm

This event is awful up north. It finally stopped snowing, and now the ground is so muddy my bottles get covered in gunk and mud whenever I launch.

I just cannot get this backslider to work properly. Does a rocket made entirely out of 2L bottles (ie, no paper cone and just adjusted CP/CG/CLA) stand a chance against a coney?

Littleboy · Post by **Littleboy** » March 15th, 2011, 4:59 pm

No we tried those but the are heavier and come down to fast (even on their sides). We have gotten 11 seconds with all 2 liter rocket. 15 with tube. and 25 with coney (that is now gone)

Ham_008 · Post by **Ham_008** » March 15th, 2011, 6:46 pm

Alright, so I launched again today and it was interesting...

My rocket had a sweet backslide, but it only began doing so less than halfway down (when the rocket was going down). I was wondering what could I do to make it backslide immediately rather than halfway down. I got 10 seconds and it seems like it'd be around 20 if it backslid the whole way...

Any pieces of advice?

Primate · Post by **Primate** » March 15th, 2011, 7:25 pm

Littleboy wrote:No we tried those but the are heavier and come down to fast (even on their sides). We have gotten 11 seconds with all 2 liter rocket. 15 with tube. and 25 with coney (that is now gone)

Thought so; I won't bother with it then. Is your "tube" just a coney with a cylinder instead of the cone?

Littleboy · Post by **Littleboy** » March 17th, 2011, 3:18 pm

Any predictions for times in Michigan regionals in a fairly competitive region?

Ham_008 · Post by **Ham_008** » March 17th, 2011, 6:39 pm

my tube is a wrapping paper roll with other ways of aerodynamics as well in between it and the bottle itself.

what should i do to change/improve it

Post by **fishman100** » March 18th, 2011, 6:14 pm

Platypus wrote:My highest time is 17 seconds with a backslider. Is this good enough to win/or get close to winning states?

This will be fun watching all the rcokets at Sates

I'll be your competition

\

A week ago, while it was pouring rain (and my partner ended up sick), we launched and got 22.47 seconds.
While not in the rain, our highest time was 25.12 seconds

Primate · Post by **Primate** » March 19th, 2011, 11:26 pm

Winning time for the NY state competition (division c trial event) was 21.5 seconds.

Cheesy Pie · Post by **Cheesy Pie** » March 19th, 2011, 11:29 pm

I don't know our times yet. But one fell apart and one landed on the school.

Littleboy · Post by **Littleboy** » March 20th, 2011, 7:02 am

Our times were both between 21.35-21.66. They almost went on the roof.

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