The definition of fin on a rocket would be, a thin, protruding piece of metal whose function is to provide aerodynamic stabilization when the rocket is in flight.
There does not appear to be a "best" size. It depends on a number of factors, to include the bottle used (brand of drink & manufacturer), type of rocket, distance aiming for. One common element to consider is drag. Larger fins have greater surface and mass which will directly affect the altitude your rocket can reach.
A Rocket
Compressed air rocket.
The angle of the rocket. The amount of water in the rocket.
inside the rocket
The definition of fin on a rocket would be, a thin, protruding piece of metal whose function is to provide aerodynamic stabilization when the rocket is in flight.
fin and tip (cone).
A longer fin has increased aerodynamic drag. The geometric relationship between the drag caused by the fins and the center of gravity of the rocket determine the stability of the rocket in flight. Less aerodynamic drag means the rocket can go higher or farther, but it also means the rocket is less stable in flight. This tradeoff has to be considered in the design of the rocket.
It helps stabilise the flight
yes
There the most aerodynamic of fin shapes.
Tengo lo mama
the fin keeps the rocket stable while the rocket flys.hope that helps! POKECARP out
Possibly to produce stability or a semi-controlled flight (?)
A rocket body tube is the center of a rocket; also the piece that holds the rocket together.
Triangle.
the rockets on the fin are over 50 feet long and this so the rocket will be stable during flight