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Derelict
by water being placed into the bottle and then, when you launch your rocket, the rocket will spin (if it has at least 2 fins) and the water will spurt out and make the rocket go higher in the air. (Tip:the more it spins,the higher it will fly)
You can by making the bottle more aerodynamic. Try adding a paper cone taped to the bottom (top in situ) of the bottle.
4, Why? More stabilization, helps it fly straight up.
use your head
Derelict
Yes as it control the dirctions of the rocket.
by water being placed into the bottle and then, when you launch your rocket, the rocket will spin (if it has at least 2 fins) and the water will spurt out and make the rocket go higher in the air. (Tip:the more it spins,the higher it will fly)
You can by making the bottle more aerodynamic. Try adding a paper cone taped to the bottom (top in situ) of the bottle.
Fins are used to help keep a rocket stable. The only way to find out if more fins will make it more stable is by testing it.
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At least 2, if not 3. More water is better! Your body needs it.
add more mentos!
I can launch a bottle rocket from a balloon. Please be more specific. Are you attempting an N-prize entry?
A longer, skinnier bottle works better than a shorter, fatter one because the increased length makes the rocket more stable and moves the center of gravity away from the nozzle and fins. A 2 liter soda bottle is ideal since they are strong (they can usually withstand up to 30 psi) and lightweight.
There are several materials you can use. Plastic assignment folders make an excellent fin because they are light weight and more durable than paper. Corriflute (Correx) is also a great material as it to is sturdy. (i am assuming you are building a 2 liter water bottle rocket) Avoid using paper and card board as the water can damage the fins making them anti-productive.
4, Why? More stabilization, helps it fly straight up.