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Post by frankieduck20 on Oct 22, 2018 18:03:44 GMT
Hello , we have recently bought a 2007 Jeanneau 45 and have found a problem with the boat pulling to port when motoring at about 5 kts. Some force is required on the helm to overcome this and keep the boat on a straight course . At 6-7 kts the pull to port is very heavy and significant effort is necessary . If the wheel is released at this speed the boat spins violently 360 degrees in almost its own length. Sailing at 5.8 kts with the engine off , there is no problem , the steering is light and responsive .
Does anyone have any experience of this , ideas or suggestions ?
frank and scary mary |
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Post by uli057 on Oct 23, 2018 12:06:07 GMT
Hello. The rudder blade is no longer perpendicular to the longitudinal axis of the boat. This is a similar principle as with a bicycle fork! Probably the lower bushing is defective. Did you get the boat out of the water like you bought it? LG. ULI
take a look here: |
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Post by cayoloco on Oct 24, 2018 12:14:02 GMT
I have a 2005 43DS with the same issue. I also notice that the more power I'm under while motoring, the more she wants to turn to port. After all my measuring and studying, I believe that it's just prop walk. I have a 4 blade feathering Max prop that pushes Cayo Loco along at 8.25 knots at 2250 RPMs. When she's sailing she handles perfectly. Best vessel I've ever sailed for holding a line. It's under power the wash from the prop effects my rudder and turns the bow to port. In reverse, the stern walks to port, making docking a breeze; but I don't feel it in the rudder because the prop is not pushing water against it. You can check you bearings and all that, but it's probably the same as my boat; normal prop wash.
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bigp
Junior Member
Posts: 17
Jeanneau Model: Sun Odyssey 45 DS
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Post by bigp on Nov 2, 2018 16:47:33 GMT
Hello , we have recently bought a 2007 Jeanneau 45 and have found a problem with the boat pulling to port when motoring at about 5 kts. Some force is required on the helm to overcome this and keep the boat on a straight course . At 6-7 kts the pull to port is very heavy and significant effort is necessary . If the wheel is released at this speed the boat spins violently 360 degrees in almost its own length. Sailing at 5.8 kts with the engine off , there is no problem , the steering is light and responsive .
Does anyone have any experience of this , ideas or suggestions ?
frank and scary mary Hi, we just bought a SO 45 DS and have experienced exactly the same issue. I have tried to find out what it could be, but prop walk is the nearest answer I can see. Have you found out anything else? |
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jon
New Member
Posts: 2 
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Post by jon on Nov 9, 2018 1:48:01 GMT
Hello , we have recently bought a 2007 Jeanneau 45 and have found a problem with the boat pulling to port when motoring at about 5 kts. Some force is required on the helm to overcome this and keep the boat on a straight course . At 6-7 kts the pull to port is very heavy and significant effort is necessary . If the wheel is released at this speed the boat spins violently 360 degrees in almost its own length. Sailing at 5.8 kts with the engine off , there is no problem , the steering is light and responsive .
Does anyone have any experience of this , ideas or suggestions ?
frank and scary mary Hi, we just bought a SO 45 DS and have experienced exactly the same issue. I have tried to find out what it could be, but prop walk is the nearest answer I can see. Have you found out anything else? |
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jon
New Member
Posts: 2
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Post by jon on Nov 9, 2018 2:05:16 GMT
We have a Jeanneau 45DS. The problem you have is indeed prop walk. It is the way the thrust from the prop affects the wash, which in turn affects the rudder. It does not happen when sailing but only when motoring. We have done 2500 hours of motoring (plus many more sailing) and it has had not affected the steering performance or its reliability. We always motor under autopilot so you do not feel the prop walk.
I believe prop walk can be corrected by sanding a bit on one side of the leading edge of the rudder. However this requires someone with expert knowledge. Best to turn the autopilot on and open the champagne.
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bigp
Junior Member
Posts: 17
Jeanneau Model: Sun Odyssey 45 DS
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Post by bigp on Nov 9, 2018 13:04:30 GMT
We have a Jeanneau 45DS. The problem you have is indeed prop walk. It is the way the thrust from the prop affects the wash, which in turn affects the rudder. It does not happen when sailing but only when motoring. We have done 2500 hours of motoring (plus many more sailing) and it has had not affected the steering performance or its reliability. We always motor under autopilot so you do not feel the prop walk. I believe prop walk can be corrected by sanding a bit on one side of the leading edge of the rudder. However this requires someone with expert knowledge. Best to turn the autopilot on and open the champagne. Hi Jon and thank you so much for your reply. Now i can relax, knowing that this is quite normal. |
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Post by jeremyr on May 8, 2021 1:14:30 GMT
Add me to the list. I wish I had seen this posting back in 2018 as I have always harbored (no pun intended) a suspicion that we have an alignment problem. But if so, it's not limited to our 2008 SO 45DS. That said, it is remarkable how strong the pull is. In fact, it is so strong that I am reluctant to use the autopilot at anywhere near full throttle after once experiencing the autopilot disengaging. The left turn was so abrupt that it could have thrown someone on the foredeck overboard.
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Post by NZL50505 on May 8, 2021 5:07:22 GMT
Every boat I have ever owned suffered this effect from saildrive to shaft drive and from kiwi designs to Westerlies and Jeanneaus - indeed at full throttle the turn would be so abrupt to throw people and unstowed possessions to the floor.
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Post by bereboot on May 8, 2021 5:49:11 GMT
Jeanneau 39i, same problem but to starboard.
Before we had a flex o fold propeller, and no issue. (flex o fold is still for sale)
Last winter we changed to a max prop, and now we encouter this "problem".
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Post by alenka on May 8, 2021 8:59:58 GMT
All the DS43's I have been on suffer with this to a greater or lesser extent, which I think you can put down to prop wash; and the variable bit comes from what type of prop you have installed.
Maybe it is Gods way of saying stop motoring and start sailing!!!
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Post by sailingabe41ds on May 10, 2021 6:13:16 GMT
Well..I have 2015 41DS with a saildrive and it has almost no prop walk and I do not fight the wheel at full speed. I do not know if it is because of the hull design or the saildrive but it is remarkably better than the Hunter 36 I had. When the OP states that his boat spins and violently turns 360 degrees in one boat length, I would think that was more than prop walk. However, I never owned a Jeanneau 45.
Abe
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