Prop Walk

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May 17, 2004
2,111
Other Catalina 30 Tucson, AZ
Last week I was in Puerto Penasco (Rocky Point), Mexico, which is located on the Sea Of Cortez about 270 miles south of Tucson. I went to the marina to see what was happening and noticed 2 guys trying to dock their boat under power. When I see a guy and a gal in trouble I'll watch for a bit and then offer assistence (normally what happens is the woman jumps at the offer) but with 2 guys I just watch. After about 5 minutes one of the guys asked me if I knew how to dock a boat. I told him to try to point the bow to the dock so I could come aboard and inside of 10 minutes I showed these guys how to make prop walk work for them. Here's how it works. Lets assume you have clockwise right hand rotation. If you have counter clockwise left hand rotation just reverse what I'm telling you. Also, by increasing acceleration, no matter what rotation you have, you just make things worse because the reaction just spped up so go slow with the accelerator. Port side docking - boat going forward and slightly angled toward the dock, rudder centered and engine in reverse. The stern will swing nice and easy toward the dock. Here's where skippers get into trouble in the above situation. Instead of centering the rudder they turn the rudder to port. So the scenario is the the boat is moving forward and bow is slightly angled toward the dock, the rudder is toward port and the engine is in reverse. They goose the engine and the stern first pulls to starboard. To correct the situation they turn the rudder to starboard and that is where things get all screwed up. What they should do is nothing - just wait a few seconds after you goose it and the stern will rapidily pull to port. Say your backing the boat and you want to turn the stern toward the starbord dock. Center the rudder and put the engine in forward. The stern will swing slowly toward the dock. Say you want to rapidly swing the stern to starboard while backing. Turn the rudder to port, put the engine in forward and goose it. The stern will swing rapidly to starboard. It is hard to visualize this stuff sitting at your computer. The best thing to do is try it the next time your on the water. Spend a few minutes in your turning basin (trying this in the slip way is not a good idea until you get the hang of it)to get the idea of how the forward or backing motion of the boat is influenced by the position of the rudder and whether the engine is in forward or reverse and also what happens when you goose the engine. With a little practice you can get so good that you can park your boat in an empty space between 2 boats!! Last week I met 2 nice guys in Puerto Penasco. They shared a few of their Corona's with me. Sitting on a boat, sipping a few beers in the warm Mexico weather and talking about sailing - picture that. It is sure hard to beat!! Anyone got any docking stories they would like to share - either personal or stuff they have seen?
 

abe

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Jan 2, 2007
736
- - channel islands
Newbies Stinkpots who refuse to take lessons...

2 months ago started their engines in gear full throttle. Thank God, they forgot to untie one of the lines. This was the last straw...many other stories. They got kicked out of our marina. abe
 
May 25, 2004
978
Catalina Capri 14.2 1670 Rochester, MN
Impossible

I've got one. When I was a young lad in the Sea Scouts we operated from a 40' ketch. We had one inept adult leader who managed to get the boat stuck between two pilings that were 39' apart! His lack of understanding of the strong prop walk that boat had was a key factor for his poor boat handling skills.
 
Jul 8, 2004
157
- - Pinedale, WY
Right On!

Thanks Don! That's the cleaest explanation of how to use prop walk that I've ever seen. Wish I had a big heavy boat with inboard and rudder to try it. RK
 

Mike B

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Apr 15, 2007
1,013
Beneteau 43 Baltimore, MD
Add a spring line

After you get prop walk down pat, learn to work a spring line off the proper cleat and you'll really have increased control not to mention an impressed audience. As mentioned before you just have to keep the over zealous helpers from styming your efforts. Unfortunately very few dockhands know how to spring a boat into a slip. St Michaels Harbor Inn has some of the best crew on the bay when it comes to such things.
 
May 17, 2004
2,111
Other Catalina 30 Tucson, AZ
Cramped Dock

Roger: I'm not sure which way your prop rotates but putting your boat into your slip is a snap. What you would do is center your outboard and don't touch it. You have now made it into an inboard engine. Where OB engine guys tend to get screwed up is they try to use the OB and the boat rudder together and it ends up like a Chinese fire drill. If you were a skipper approaching Rogers dock here is what you would do. As you approach the parking spot sort of aim the bow on an angle toward the corner of the dock and then position your rudder to correspond to your prop walk rotation and then shift to the proper gear and then give it some gas - not a lot until you get the hang of it. The stern should slip nicely into your parking space. Try it a few times after you determine your prop rotation. After you get it down pat then hope that some of your dock neighbors are around when you dock. They'll think your the captain of the Queen Mary!!
 
May 17, 2004
2,111
Other Catalina 30 Tucson, AZ
Docking With OB

Dick Of Sylvan: Thank you for the nice compliment. I try to keep things simple so I don't confuse myself. I assume your boat has an OB. Please refer to my message to Roger. Try centering the OB thus making it into an inboard and then use your shifter, rudder and accelerator. Does not matter the size of the boat. They all work the same way. Only thing you have to know is the prop rotation and I think it is right hand but I'm not sure.
 
May 5, 2006
1,140
Knutson K-35 Yawl Bellingham
This is something I need to work on too

Oh Joy has a large amount of prop walk. It'd also help if tranny cables would quit breaking right when I need reverse. I think the last one I put in will do the trick.
 
May 17, 2004
2,111
Other Catalina 30 Tucson, AZ
Broken Cable

Charlie Cobra: Man, that made me think of an experience I had. I'm sure others have similar stories. One Wednesday, myself and my dog took the boat out merely to dump the tank at the marina dump station. I never left the marina. On the way back to the slip my procedure is to cut the engine to neutral just before I turn into the slip way and use my momentum to drift into my slip, which is 3rd from the end. At the point where I shift to neutral I pull the shift lever and nothing happens. I do it again - all this time I'm getting closer to the point of no return where I would be committed to the slip way and I still can't figure out what is wrong. At the last moment I swing out into the turning basin. It is a week day and there ain't a soul around. The dog looks at me and thinks what is going on. No one want to be embarrased in front of their dog so I made believe I had everything under control!! I made a number of turns in the basis trying to figure my options. One was I could bounce off a end tie and stop the boat and then get the dingy to move the boat to my slip but I noticed that when I turned upwind (I have an upwind slip) the boat slowed (it blows pretty good at Long Beach in the afternoon) and I felt I could use this to my advantage. Next, I realized I have a cleat in the middle of the slip that I use to stop my forward progress and if I timed it right I could stop the boat from plowing into the dock by snubbing it off. It was time to go as the turning basin was getting me nowhere and the dog was getting antsy. The Readers Digest version is the docking went perfectly even though I came in at about 900 RPM - I've seen a lot of guys try to dock that way when, at the last moment, they throw it into reverse to stop, but I did not have that option. Here's the moral of the story - when you encounter a situation try to take a few moments to clear your head and plan your next step. Blundering ahead, without thinking out your options only makes matter worse.
 
May 17, 2004
2,111
Other Catalina 30 Tucson, AZ
Cut The Engine

Brian: Yes, I could have cut the engine but steerage way was about all I had going for me. My slip is 3 from the end. If I miss it or a sudden gust of wind hits me once I get into the slip way my next stop is about 65 slips away and the rocks. As I mentioned, what I normally do is shift to nuetral just before entering the slip way and drift into the slip. Normally, it goes smoothly but every once and a while I have to shift to forward and goose it a little to overcome the wind or because I shifted to nuetral too soon. As an aside, I see a lot of sailors power into their slip and at the last minute slam it into reverse and give it full power. Actually, it is amazing the amount of momentum a 12,000 lbs C30 has. It will drift a pretty long way and the drifting action makes for a very smooth landing.
 
May 5, 2006
1,140
Knutson K-35 Yawl Bellingham
I was already into the slip, dead slow

and went to put it into Reverse, it clicked like it was in there and when I goosed it to stop, it surged forward instead. The click turned out to be the cable breaking and it was still in forward. Embarrassing to say the least.
 
Dec 25, 2000
6,052
Hunter Passage 42 Shelter Bay, WA
Hi Don, I've learned over the years since...

owning Belle-Vie to do what she wants to do rather than fight her. Same goes with my wife. Once I learned that lesson, she is a real pussy cat to handle. Easy to parallel dock in reverse, or backing out of a very long dog leg fairway (200 yards) in reverse. Terry
 
May 17, 2004
2,111
Other Catalina 30 Tucson, AZ
Shift Cable

I can't speak about other boats but with the Catalina's the cables connections are in the worse place for the development of corrosion and the problem is most skippers never take the time to check their condition - until they break. When mine broke and I had a chance to look at the problem at the dock the whole tranny shift connection contrapation fell apart in my hand so I had to not only replace the shift cable but the entire connection as well. Since I was at it I also replaced the throttle cable as I felt could it be far behind from breaking as well.
 
May 17, 2004
2,111
Other Catalina 30 Tucson, AZ
Shift Cable

I can't speak about other boats but with the Catalina's the cables connections are in the worse place for the development of corrosion and the problem is most skippers never take the time to check their condition - until they break. When mine broke and I had a chance to look at the problem at the dock the whole tranny shift connection contrapation fell apart in my hand so I had to not only replace the shift cable but the entire connection as well. Since I was at it I also replaced the throttle cable as I felt could it be far behind from breaking as well.
 
Jul 8, 2004
157
- - Pinedale, WY
180 Degrees

Don: On my C22, reverse is accomplished by turning the engine 180 degrees which makes it a little more complicated as then the throtle is way back and hard to control while looking forward. On the other hand the craft is light enough to be able to manhandle without much problem, and mostly I like to dock without any power beyond that of the wind. But someday, I may be in a bigger boat and hope I can remember your advice. RK
 
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