A mishmash of questions for you all:
What does the amount of rudder blade in front of the pivot point have to do with performance/turning? What would a rudder with virtually no blade in front of the pivot act like? Please bear in mind, my boat is slow. Maybe 10 knots wot.
The reason I ask, is that my rudder an prop are awfully close, and i think it is causing turbulence. I can hear cavitation at some rpms, and don't know weather it is coming from the prop hull clearance, the back of the keel, the prop/rudder or all of the above.
I made my rudder out of foam and glass, in the typical fiberglass rudder shape.
And like I said, it is very close to the prop. From reading earlier threads, perhaps a thin metal one may be better?
I was on Michigan wheels web site. I have a brand new 14 square prop. I don't know the model off hand, but it is a vey basic 3 blade. I get 3600 rpm on my little 3gm30 yanmar with this prop. I think I've got just over an inch of hull clearance. Their Djx prop is said to work in situations of limited prop clearance. How and why?
I am going to try to get my transducer and gps installed this weekend, and jump overboard to scrub my hardware and bottom and take measurements as well
I know this is a garbled bunch of questions, but any insight would help
What does the amount of rudder blade in front of the pivot point have to do with performance/turning? What would a rudder with virtually no blade in front of the pivot act like? Please bear in mind, my boat is slow. Maybe 10 knots wot.
The reason I ask, is that my rudder an prop are awfully close, and i think it is causing turbulence. I can hear cavitation at some rpms, and don't know weather it is coming from the prop hull clearance, the back of the keel, the prop/rudder or all of the above.
I made my rudder out of foam and glass, in the typical fiberglass rudder shape.
And like I said, it is very close to the prop. From reading earlier threads, perhaps a thin metal one may be better?
I was on Michigan wheels web site. I have a brand new 14 square prop. I don't know the model off hand, but it is a vey basic 3 blade. I get 3600 rpm on my little 3gm30 yanmar with this prop. I think I've got just over an inch of hull clearance. Their Djx prop is said to work in situations of limited prop clearance. How and why?
I am going to try to get my transducer and gps installed this weekend, and jump overboard to scrub my hardware and bottom and take measurements as well
I know this is a garbled bunch of questions, but any insight would help