Prop in a tube

The minimal version would be a Kort nozzle and the other extreme is a thruster in a long tube. How many variations of this setup are there?

 

147.

I have no idea how many variations there are but don't forget all the jet

drives out there!

Tom

 

I was thinking of a prop not an impeller.

 

So, KURTZ, RICE, the standard outboard prop protectors, bow thrusters...

Why do you ask, gonzo?

Tom

 

Just curious about weird variations

 

Curiousity's good.

Do jet turbines count?

They're in a tube.

I guess not, they're not props...

 

Tom, do you really mean turbines? Per definition a turbine is a device extracting mechanical energy (mostly shaft power) from a fluid flow, while a pump (equals propeller and impeller) is transferring mechanical energy to a fluid. Gonzo started with a quest on the later kind of machinery. Sorry to rain on your parade, but as a turbomachinery research engineer, this distinction is a soft spot to me.....

 

I think I need to set some rules. No peeing in this thread

 

Ok Gonzo, changed fluid.........

 

baeckmo,

I really did mean turbine as gonzo didn't stipulate the fluid be water.

I should have clarified I was thinking of an aircraft style jet.

But it's still not a prop, so no matter, but thanks for asking.

Tom