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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Boat pulls to stbd moving fwd under power
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Thread: Boat pulls to stbd moving fwd under power Reply to Thread
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Topic Review (Newest First)
12-06-2012 10:33 PM
dacap06
Re: Boat pulls to stbd moving fwd under power

One thing that might do it is water intrusion in the rudder that causes asymmetric swelling. It does not take much difference to cause the pulling effect. It happened to me the first year. I drained the rudder over the winter then sealed an opened seam. Next Spring, no more pull, and it never came back.

Check it when you haul.
12-06-2012 10:07 PM
leogallant
Boat pulls to stbd moving fwd under power

Check for loose motor mounts and/or alignment of drive shaft? Something's moved/changed.
12-06-2012 09:06 PM
Lake Superior Sailor
Re: Boat pulls to stbd moving fwd under power

Pull in the anchor! No, but; you might check for un even build up on your hull , boats in slips tend to grow uneven gardens!..Dale
12-06-2012 07:41 PM
Faster
Re: Boat pulls to stbd moving fwd under power

The oddity is that this would be a 'new' problem.. not something that's always been there. Plenty of spade rudder boats have a "power pull" one way or another when the propwash impinges on the 'balancing tab'.. this kind of nuisance goes away under sail, of course.

Not sure about the IP rudder but if it's balanced that might be occurring.. but then it shouldn't be a new phenomenon unless the prop or something else has recently changed.

Having had a Max prop apart I doubt the pitch could 'shift' itself.. not without some highly noticeable rattling, vibration and other obvious goings-ons....
12-06-2012 06:56 PM
rugosa
Re: Boat pulls to stbd moving fwd under power

Quote:
Originally Posted by rhpike View Post
When I took her out Thanksgiving weekend (it was warm here in Texas!),
You just had to say that, didn't you
12-06-2012 06:47 PM
chucklesR
Re: Boat pulls to stbd moving fwd under power

Quote:
Originally Posted by rhpike View Post
Chuckles,

Good questions. I was unable to really test it under sail alone as there were light winds that weekend. I did sail it for approx 10 min under sail alone, but was only making about 4 knts in light air. Not a real good test, IMO, on such a stout boat. It didn't seem to pull to the right. I was on a port tack, but didn't have any appreciable weather helm to port either.

The diver checked the blades for movement, and said that they seemed to be all at the same pitch.
well, water might not be clear enough, but he could have read the pitch to be sure...

Edit, your diver can push and pull all he/she wants, it's not diddly compared to the force applied when the boat is moving...

I meant pull to starboard when drifting / in neutral. Next time you get the chance in your sunny clime just push her up to speed, put it in neutral and see if it still pulls.
if it does, it's drive train related - might be a loose cutless bearing even, more likely prop related.
If it doesn't, your diver is blind and missed the crab pot hanging off your keel.
12-06-2012 06:35 PM
rhpike
Re: Boat pulls to stbd moving fwd under power

...and did see the posts where some IP owners had a similar problem. I discounted that as my problem is new!
12-06-2012 06:30 PM
rhpike
Re: Boat pulls to stbd moving fwd under power

Thanks, Seaduction. I asked the forum there, as I'm a member, but haven't received any replies.
12-06-2012 06:26 PM
Seaduction
Re: Boat pulls to stbd moving fwd under power

Randy,
A lot of IP owners report a slight tendency to turn to starboard under power, myself included. Its not severe, but its there nontheless. You can read more about it on the island packet 'homeport' forum. IP Home Port - The Official Website For Island Packet Yacht Owners Since 1998
Hope this helps.
12-06-2012 06:26 PM
MarkofSeaLife
Re: Boat pulls to stbd moving fwd under power

I have thatroblem when a pretty girls walks along the dock to the right...
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