A regular rectangular shaped fin makes the best flight time.
Because it is light weight, and easy to fold into the fin shape.
The best shape of a rocket is a cylinder with a cone at the top, because that form penetrates easily trough the wind!
Triangle.
The fin shape is usaly heart shape,but black.
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.
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 !
It helps stabilise the 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 fin on a rocket is a flat surface projecting from the body that helps stabilize the rocket's flight by providing aerodynamic forces to keep it on a desired trajectory. Fins increase stability by creating drag and preventing the rocket from spinning or veering off course during ascent.