Surface piercing propeller characteristics
Now, I am evaluating a Boat (displ. 16,3 T) propelled with Surface piercing propeller ( Pitch : 28", diameter :23,5", and six blade). recent sea trial test result show that the engine (CAT 2 x 570 HP) is run in a overload condition for a normal speed operation. then i intend to make an evaluation especially the "matching" problem, thus i need an open water characteristics data for the propeller mentioned above.
i've been searching for it and i haven't got it yet. where can i find this data?
please, i need a help here..
thank you very much
Surface drives are SO sensitive that they must be individually matched to each boat; I'm not aware of any accurate prediction method for them. Your engines are overloading, you say... at what RPM? what's their rated RPM? normal RPM?
The reason you can't find the data you want is probably because it may not exist. Propeller salesfolk usually guess with a bit of nasty math, but they'll always do sea trials on several props to find what's actually right. And it depends very much on the boat, engines and use.
M. B. Marsh Design
The Marsh Fleet: Small-craft cruising on the waterways of Ontario and beyond
I have found that the engineering department at Arneson Industries are a helpful bunch.
'"Forward, the Light Brigade!"'
-Alfred Lord Tennyson
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Best shape for surface piercing foil||grob||Sailboats||48||11-23-2010 05:47 PM|
|bigger props faster ship?||Peter H||Boatbuilding||23||02-01-2010 01:08 PM|
|efficiency of surface drives and surface piercing propellers||David Knight||Powerboats||7||09-24-2009 05:10 PM|
|Surface percing propeller matching problem||manunk||Props||1||06-21-2005 04:12 PM|
|Surface Piercing Props||gyrojocky||Props||22||12-10-2004 08:50 PM|