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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Prop walk combined with wind
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Topic Review (Newest First)
03-27-2013 07:47 PM
dabnis
Re: Prop walk combined with wind

Try it in one of these with a big cross wind, single screw. Oh, my!!

Paul T
03-27-2013 07:01 PM
jimgo
Re: Prop walk combined with wind

That other mast looks familiar...
03-27-2013 10:11 AM
chucklesR
Re: Prop walk combined with wind

Ambidextrous docking works too.
I can go in either way.
03-26-2013 04:47 PM
jackdale
Re: Prop walk combined with wind

Quote:
Originally Posted by jimgo View Post
I went with a slip with a long side finger in part because I wanted to be able to pull in bow first. That should avoid most of the reasons for wanting to be in stern first (we'll loverlook the river, so a better view will be had from the stern).
Any problems departing? I usually find it easier to leave bow first. But stern first is usually a better view of the traffic in the fairway. It's all compromises, as in anything boating.
03-26-2013 04:37 PM
jimgo
Re: Prop walk combined with wind

I went with a slip with a long side finger in part because I wanted to be able to pull in bow first. That should avoid most of the reasons for wanting to be in stern first (we'll loverlook the river, so a better view will be had from the stern).
03-26-2013 03:34 PM
nolatom
Re: Prop walk combined with wind

I've found that with limited maneuvering room and having to back in, a breeze blowing hard from port to stbd combined with prop walk, can induce starboard rotation that can't be halted and prevents me from staying "straight" long enough to get into the slip.

So, since the outer piling that would ultimately be the stbd bow line was well-fendered and boat has a steel-capped horizontal rubrail, I was able to stick the stern in far enough to get that bow line onto a starboard aft quarter cleat, then use it as a backing spring line to straighten her out, while we then boathooked the port dock lines and brought her in straight with no tears.

Note the emphasis on "well-fendered, and good rubrail", don't back in without them...;-)
03-26-2013 03:29 PM
Joesplace
Re: Prop walk combined with wind

Use to have lots of problems with a left hand drive and two blade prop. Changed to right hand drive with a three blade prop = much more control! Now I can backup and have some control . . .

Joe
03-26-2013 03:05 PM
BarryL
Re: Prop walk combined with wind

Hey,

My boat (O'day 35, shoal draft fin keel, fixed 3 blade prop) has moderate prop walk. On my boat (YMMV) the stern moves to port but the bow stays in place (assuming no wind).

When docking I use prop walk to my advantage in that I approach with dock lines and fenders on port. I motor to the dock at a 45 degree angle to the dock with the engine in forward and at idle speed. When I'm 50 feet or so away I place the transmission in neutral. When I'm 1 boat length from the dock I place the transmission in reverse. The boat slows, the stern swings towards the dock, the bow continues to get closer and when the boat is against the dock I place the engine in neutral, step off, and tie up.

I can turn the boat on her axis by placing the rudder hard over to starboard and alternating between reverse to forward.

Pulling into a slip stern first is not something I do very often and I'm not good at it. Add some side wind and I am not happy. I had to do that a few years ago when staying in block island and it took me about 15 minutes to get into the slip. I didn't damage anything and eventually my heart rate and blood pressure came back down.

Barry
03-26-2013 02:49 PM
kellysails
Re: Prop walk combined with wind

My saildrive with MaxProp, zero prop walk. The boat backs up like a dream, never been on another boat like it.
03-26-2013 01:45 PM
jackdale
Re: Prop walk combined with wind

Quote:
Originally Posted by sailingfool View Post
Any of the turning motions, such a prop walk, rotate a sailboat about its keel, more specifically I expect it is the CLR point, which we should appreciate from the weather helm/lee helm discussions.

If the stern is moving to port, the bow is moving to starboard. A bow thruster has the same affect...
Yep.

And that is why you can turn a boat in its own length by turning the wheel hard over and using prop walk to spin it on this keel. That works best with fin keel boats and no wind or current.

If you find you have too much prop walk, put the transmission in neutral. If you want more prop walk, throttle up.

Some saildrives have little or no prop walk. And some of those that do walk to starboard.
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