correct me if I am wrong

[bobby_hamill]

OK I was given the fin span of a rocket
To get the span of just 1 fin I would

subtract airframe diameter from fin span

the rocket has 4 fins so after diameter is subtracted from fin span I
then take the result and divide by 2, The result is the span of just 1 fin ?

correct ?

Bobby

 

[KarlS]

Sounds right.

 

[solid_fuel]

but would that work for a three fin rocket as well?

 

[hornet driver]

Fin span is measured tip to tip---half span is 1/2 that or center line to tip-- fin length is tip of fin to BT--H

 

[hornet driver]

but would that work for a three fin rocket as well?

Half span would be 1/2 of the triangle of two of the fins--fin length would still be tip to BT