Propellor shaft dimensioning

[Arvy]

Hi All,

I searched the forum but couldn't find a answer very fast, so sorry if this has been asked many times.

I need to dimension a propellor shaft for a small vessel, with an 11HP inboard diesel engine. I need to know the diameter and maximum length (or at how many places the shaft needs to be supported by bearings).

Does anyone know a website or a book about this subject?

Thanks.

[conceptia]

try to get NES document, it is there inside.
Also apply the basic torsion of cylindrical shaft. This will give you a better idea of the minimum diameter required.

Originally Posted by Arvy

Hi All,
Does anyone know a website or a book about this subject?

Thanks.

Vetus (in your backyard) will answer that question with pleasure!

Vetus.nl

Regards
Richard

[Arvy]

Thanks Apex1, I never considered that Vetus also did propellor shafts.. kinda weird, must be my memory failing

I will get in touch with them.

[vinceUK]

Hi,

this comes from Dave Gerr, the very good: "Boat Mechanical Systems Handbook".

Fill in the pink cells and the results should come in the orange ones.

Hope this helps, Vince

[Arvy]

Hi VinceUK,

Thanks for the excelsheet and the title of the book, it will probably contain a lot more info I will need along the way.

Untill now I only worked on hulls and created cnc cutting files from them, but never had to deal with the systems inside them

[conceptia]

thanks mate for the excel sheet..

[skipper_rj]

Another Dave Gerr´s book: Propeller Handbook. It is also very good!

[rxcomposite]

Dave Gerr's book is excellent. Try also ABS rules as it has data on different materials that can be used. You might also want rudder post design.

Originally Posted by rxcomposite

Dave Gerr's book is excellent. Try also ABS rules as it has data on different materials that can be used. You might also want rudder post design.

Right, and then add at least ten percent. Or better go for the next size.

Regards
Richard