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2011/2012 Team (set)
Ben M. - lead
I really like how this describes how to troubleshoot your rocket. This site also includes nice construction tips.
Here’s another simulator:
I didn’t notice that we were doing a “swing test:.” This from here:
Test Your Rocket
The safest and easiest way to check your rocket's stability is to do a "swing test."
Attach a string to the rocket at its center of gravity. Then, swing the rocket around yourself, holding on to the string, to see if it is stable. If the rocket tumbles and does not straighten out, then it will probably fly badly when launched. Make adjustments to your design, lengthen the body, add fin area, or noze weight, until it no longer tumbles.
This NASA educator's guide includes more precise information about the swing test and how to balance the rocket (page 16 or so):
From this file:
All rockets have two “centers.” The first is the center of mass. This is a point about which the rocket balances.
The other “center” of a rocket is the center of pressure. This is a point in the shape of the rocket where half of the surface area of the rocket is on one side and half on the other. The center of pressure is different from the center of mass in that its position is not affected by what is inside the rocket. It is only based on the rocket’s shape. See how to here:
This site shows how to run drag tests using a “wind tunnel” (fan)
the rockets in this booklet are a little different, but the explanation for how center of mass changes effect of drag forces is quite good. Also includes nice explanation of the physics involved.
Backslider construction. Note the process to optimize the fins
The water rocket achievement world record association:
Current altitude record holder:
Multiple stages allowed?
Last year's results
2010/2011 Bottle Rocket Team:
Dylan T. (BA)
GVSU Regional Info:
Bottle Rocket (B) Rockets will launch at 60 psi. Please note there is no impounding for rocket(s) and due to spring campus
construction, this event will be located in a different location to be announced
Look at this:
for more go to
WHAT HAPPENS IF YOU LAUNCH YOUR ROCKET WITH NO WATER?
help on how to format text
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