hi,

i would like to model a snail shell, actually it is simpler than snail shell.

it looks like a air blower or supercharger, whereas there is no turning part, air flow backward.

back to back convergence divergence cones are easy.

air inlet tube is tangential to base of convergence cone, which is a little bit challenge.

i am a rookie and i got off on wrong foot when i modelled last 3 ones. i would like