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It depends on a lot of stuffs like how much do you want your rocket to be stabile. But at least it must be 3. For example for the same stability you may have 3 fins that have large surface area or 4 which is smaller or more. When you increase the number of fins with the same surface area then the drag will increase because of the surface friction so 3 or 4 fins are generally used but there is no certain limit of the number of fins .
Melih Gazi Kırpık
Wiki User
∙ 14y agoI think that three fins are a good number of fins to have on a rocket.
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How many fins should a water rocket have?
A water rocket should probably have three to four fins.
Why do you use fins and cone for a bottle rocket?
You use fins and a nose cone on a bottle rocket because the cone reduces the drag on the rocket, and the fins help stabilize the rocket.
What do rocket fins do on a rocket?
the fin keeps the rocket stable while the rocket flys.hope that helps! POKECARP out
How do fins on a straw rocket affect it's flight?
Fins on a rocket affects its flight by the way they are built on the rocket
How many fins to be attached to the water bottle rocket?
3
What is a disadvantage of having 4 fins on a rocket?
Wat is the disadvantage to having 4 fins on a rocket.?
What is the best fins for the bottle rocket?
the best fins for a bottle rocket is having four fins located at the bottom of your bottle rocket the shape of long triangles ! ! ! :) hope it helps !
How many fins must be attached to the water bottle rocket to give it the longest airborne time?
3 t05 fins
What are rocket fins?
Fins are small aerodynamic wings attached to the rear of the rocket. These are to give guidance and stop it from spinning.
Why do water rockets need fins?
Water rockets need fins because the rocket needs to stay in balance....without fins on a water rocket, the water rocket would be going out of control because it is not in balance!
What do the call the wings of the rocket?
Fins.
What stabilizes a rocket?
It's fins
