shell width to leangth ratio ?

[Christoffer]

Just a quick question. 
is there a "standard" for the width to length of shells for naval artilery ?

When i look at different pictures they all seem to be resonabely simmilar but i  cant find any talk about why or the effects of whorter/longer shells.


Anyone that can iluminate me ?

[davidt_man]

There are two very important equation related to ballistics.  They are sectional density and ballistic co-efficient. Both of these equations are related to length, width , and weight of a projectile.