Propeller used in Rolls Royce US 25

Hello guys ! I want to know what kind of propeller is used in the Rolls Royce US 25 system and by that i mean the exact specifications or something close .
For a tractor tug i chosen the Rolls Royse US 25 system for propulsion but i want to know if i need to calculate the propeller or i just stay with what propeller is used by rolls royce us 25 .

I hope i was clear enough . Thank you !

 

If you give them the data of the vessel and tow it will be used for, the company will do the calculations for you.

 

Thanks for your response sir , but they will do it for free ? Where can I contact them ? I just need the main characteristics of the propeller in order to prove that with the engine , it gives me the bollard pull i need .

Thanks a lot !

 

http://www.odim.com/Images/Marine engine and prop_prog 2012_tcm92-36415.pdf

 

thanks Gonzo ! I will send them an email an i'll see what they can do .
I will post here the features updates if anybody will need the data .

Good evening !

 

Rolls-Roys couldn't help me so i chosen Schottel . They have an interesting online progamme called HYDRA ONLINE and you can calculate the exact thrust from the various models of the propellers .