Propeller Selection

[hasani]

I want to choose a propeller for a tug with the following particulars:
Main engine power(single screw): 3300bhp
RPM: 600
Gearing rate 1:2
which want to tug a 5000 tonne weight in 6 knot speed. and does not have kort nozzle.
please inform me about the specifications of the best propeller which can satisfy my needs. i want to know the type, No. of the blades, and the diameter of the propeller.
Tnx

[Guest625101138]

How many threads are you going to create for the same question? it makes it extremely confusing for people who respond to follow other responses?

Rick W.

[safewalrus]

With all these threads maybe he can knit himself one?

[artemis]

Originally Posted by hasani

I want to choose a propeller for a tug with the following particulars:
Main engine power(single screw): 3300bhp
RPM: 600
Gearing rate 1:2
which want to tug a 5000 tonne weight in 6 knot speed. and does not have kort nozzle.
please inform me about the specifications of the best propeller which can satisfy my needs. i want to know the type, No. of the blades, and the diameter of the propeller.
Tnx

Visit the website of one of the many propeller manufacturers (google the name), fill out their form and email it. You'll get an answerback in a day or two.

[safewalrus]

Sound advice there artemis - for all of us

read it as you may, I know art will read it the way it is intended!

[artemis]

Originally Posted by safewalrus

Sound advice there artemis - for all of us

Thank 'ee kindly Walrus. I've left a little tip for 'ee

[Sean Herron]

Hello...

See attached - if it works...

You first need to determine your shaft diameter - bearing spacing if more than one in the log - and your available hull clearance - need 15 to 20 percent of wheel diameter so as to not cavitate at the top of the swing ...

Here is a good site - an old friend even - see http://www.bertram31.com/proj/tips/shafts.htm ...

That gets you started - as for material and section thicknesses for a tow application - talk to a good maker that have their own foundry and machine facilities - like http://www.osbornepropellers.com/Consulting.htm ...

These guys have been casting and milling their own product since the 1930's...

All pretty basic stuff - from this point it can get crazy...

SH.