2020 Update on Paravanes and a Few Other Things

First, I’m still alive, though it was a close call. No, it wasn’t Covid-19, but something far worse, boredom.

I hate being bored and perversely, the less I do, the less I want to do. Thus, my creative energy that it takes to write these blogs or make YouTube videos seems to have gone into hibernation for the winter. Is it back now? Only time will tell, but since I’ve gotten a few emails asking if I was still alive, I thought I better get off my ass and write.

Second, also got an email complaining about the most recent appearance change on the blog I did a few months ago. They said it was harder to read because of the dark background. Honesty, I had noticed the same thing myself, but was hoping that I was the only one who noticed! See just lazy. Like hearing that strange noise in the middle of a passage and just hoping it goes away on its own (fat chance).

Tell me what you think of this new theme (background) and if anyone has any suggestions &/or improvements, I would be glad to hear them, though the easier they are for me to implement, the more likely it will happen.

Third, living on the Dauntless in the winter in Alaska is very different than crossing oceans or cruising to new and strange lands. More on this later, as it will be the topic in an upcoming blog.

Lastly, below is a blog I wrote mostly about the paravanes in 2016. I did write a summary of what I have done and the final paravane system setup. I will post that in the separate post.

While In Astoria, Oregon, last summer, I was finally able to get two new paravane birds. Over 25,000 miles and 5 years, I had left the USA with 4 paravane birds, two 26″ and two slightly smaller at 24″ (as measured at the base of the triangle of the bird). Going to 24″ was a mistake. I was so happy with the performance of the 26″ birds, I thought I would try the 24″ to see if they was as effective, but with reduced drag. Yes, just like a perpetual motion machine!

If I have learned anything over the last 6 years, it is that you can not escape the physical laws of the universe. Work (as in the physics definition of work as the product of Force and distance) perfectly explains the effectiveness of the paravane birds and the drag they produce.

Therefore, If I deploy just the windward bird (being the most effective), if it reduces the roll 80% of what both birds would do, then the drag will also be 80% of the total speed reduction had I deployed both birds. In the same way, the 24″ birds did not induce as much drag, but they also did not reduce the roll as much.

So, last summer, I decided to buy the 28″ birds, while in Astoria, at that glorious store, Englung Marine. With stores in the Pac NW, along the coast from Westport WA to Eureka, CA, it’s a must stop for any boater who wants the best bang for their buck.

I didn’t have a call to use them after the first day out of Astoria, but I did use them just the other day when we were returning to Wrangell from a a few days of cruising and fishing. The wind had picked up to mid to high teens from the south, producing a nasty very short period sea of 2 to 3 feet. With such a sea on the beam, this Kadey Krogen will get into quite a quick, deep roll of about 10 degrees to the lee and 5 or 6 to the windward.

Not terrible for what D and I have been through but a different story for the Vietnamese landlubbers. Also, the boat is set up for living aboard in port, not crossing the Atlantic, therefore, I deployed one bird immediately and was impressed how much the one 28″ bird suppressed the rolling.

An earlier post:

Less is Not Always Safer, More is Not Always Better

2019: This was written in June 2016, but never published. The recent Trawler Forum post about paravanes made me look for what I had written already and discovered I had never published this. So , here it is.

June 11, 2016 – The Pacific Rim or Less is Not Always Safer

While the Pacific Rim is my destination, I am actually referring to the movie, Pacific Rim Movie. Not the best of movies, I still find it hard to get my mind around why a giant robot would be effective against a giant monster. Let’s not even address the premise that this giant robot has to be controlled by two people.

Two people, they must not have done 3 legged races in camp as kids.

But I am sitting here in Largs, Scotland listening to the soundtrack, which is dramatic.

It’s good Dauntless music.

But besides the soundtrack, I do love Idris Elba. And if you have not watched Luther, make sure you watch it from season 1, episode 1.

But then he really made his name in The Wire as Stringer Bell. A depressing, but extremely insightful series.

I’m waiting for my next crewmates to arrive, Dan & Robin.

Brian left yesterday and of course he took the good weather with him. From his second day, we had nothing but fair winds, sunny skies and beautiful cruising.

That also allowed us to get Dauntless more organized and in ship shape having sat in the wind and rain for 8 months. There are still a few projects to complete. My new goal for the Wallas DT40 heater is to have it completely installed before I reach Alaska. Stay tuned. (Ha, still not installed, but I’m not in Alaska yet!)

I also had the opportunity to redo my geometry to determine the deepest I can run the paravanes birds without the possibility of hitting the prop or rudder.

Just to show that the laws of math and science have not changed all that much in the two years, the magic number is 17 feet, which is the same number I came up with two years ago.

Now, if you have been reading my blog for any length of time, you will know of my tendency to rant and rave about politicians who make decisions not based on any facts or science, but simply because it looks, sounds, tastes good.

Well, I am guilty of doing the exact same thing in this case. Which further makes my case that the right number is the right number, more or less does not make it any better, just different.

So in my case, I came up with 17 feet. This was also confirmed because my friend Larry on Hobo, another KK42, runs his at 18 feet because his poles are about 2 feet longer than mine.

So two years ago (2014), having the magic number of 17, I decide to make it 15 just to be on the “safe” side. Sounds like a no-brainer right? Then as I am actually rigging them, I decide to take another couple feet off, to make my no-brainer even better.

What could go wrong? Am I not being 50% safer? That’s what a politician would try to tell you.

No, I was being an idiot. Made even stupider because I of all people have taught wave mechanics and what happens to the actual water molecules in a wave.

In last fall’s crossing of the North Sea, it all became clear. While crossing the North Sea from Norway to Scotland in September 2015, on the first day, (of the 4 day trip), the winds were from the NW at 20 knots, gusting to 37, producing seas 12 to 18 feet.

But the paravanes were not as effective as they should have been. I realized I was running the birds too shallow. The paravane bird was getting caught in the rotor of the wave.

Waves are created by energy passing through water, causing it to move in a circular motion, producing a rotor. While the wave progresses, the particles of water in the wave itself, move up and down. If you watch a leaf floating on the water, even though the waves move, absent current, the leaf stays in place. ocean wave

Therefore, instead of pulling the boat down and thus reducing the rolling motion, all of a sudden the bird is actually being pushed up. Sometimes this would cause the bird to fly out of the water. Once I stopped and put another 5 feet on line on the bird, all was good and I got to Scotland.

So less is not always better.

And now, I will show you why more is not always better either. Having Brian on our 2016 maiden voyage turned out to be, was a godsend.

I had a thinking partner who helped me articulate my thoughts and ideas.

The only moment where two people was a detriment and not a plus was in getting back to Dauntless on the dingy. I got out, Brian got out, the dingy drifted away.

We started the engine, detached ourselves form the mooring and the dingy was reacquired 10 minutes later.

Had either of us been alone, we would have known the dingy was not secured.

Getting Ocean Ready

Just finished checking the rigging for the paravane pole and bird.

I’ve been ready to leave Vallejo for a month now. This is getting old. But I have vowed not to let myself be beat up any ore than usual.

I spent much of last week organizing parts. I thought I had only two types of hose clamps, stainless and non stainless, which I separated last year. If only life would be so easy.

As you can see from the attached picture, I have essentially 7 different stainless-steel hose clamps and guess what, that large bunch in the back of the organizer all have stainless bands, but non stainless screws! That’s totally worthless. I wish I could be sure that that bunch was not Made in America!

And they are also organized now by the size of the screw: 5mm, ¼”, 6mm, 7mm, 8mm. this allows me to easily use the same size for any particular job, as opposed to discovering that the dual clamped sanitary hoses have two different sizes of nuts.

I’m now doing things that were not on the list, like measuring the paravane bird rigging. When we left Martinique, 5,000 miles ago, I had the birds set to run 19 feet below the water surface. that’s 5 feet deeper than previously, as I finally realized that in larger seas, waves greater than 10 feet, the bird itself was being picked up in the rotor of the wave, negating much of its effect.

Stbd paravane pole with double loop proving a quick extra 10 feet of depth should conditions require it.

Since Martinique all has been good on that front. Now, I made sure of the depth and also marked the poles. In addition, I re-rigged the extra line, so that I can quickly run then 10 feet deeper if the situation, really large seas, warrant it, without stopping or even slowing down. With the re-rigging, I just have to take out a few clove hitches and the extra 10 feet is free.

Here is also a before and after picture of the driving lights. They are handy when anchoring in strange spots with other boats or mooring buoys around. I’ve also used them in dark, narrow, lonely channels. T

here have been a few too many of those.

My long term filter carton is a bit depleted. I have already taken out my last 6 Racor 2010 filters. I keep them in the engine room by the Racors..
I have only half a dozen Racor 2050 filters left for my fuel polisher, as well as a number of engine mounted filters, along with some water sediment filters for the water maker.

Driving lights on.
I only use them for anchoring in unknown places or in narrow, but marked channels.

On a Roll

Yesterday, I completed two things on the nice to do list: replacement of the Raritan water heater anode and replacement of a terminal block for my 120-volt neutral circuits in the engine room distribution panel.

After two months, I’ve finally hit my stride and actually feel confident in what I am doing. That manifested itself in those two completions yesterday. Instead of taking a couple of days, they took a couple of hours and I didn’t have to redo anything.

This got me to thinking about a job interview I had just the other day. I found myself talking about the importance of not overwhelming students, especially students who may be far being in whatever work that needs to be done.

I mentioned in the interview that even when a student was far behind, let’s say they need to complete 20 projects or work assignments by years’ end. It’s already February and they have nothing done, with only a few months to go. It’s easy for a teacher to just be upfront about it, if you don’t get these done; you’ll fail.

I’ve seen teachers do that countless times. But it won’t accomplish the stated goal of getting that student to be successful, (though it does make the class smaller). If a student sees a mountain of work to do, they never get started, discouraged, not seeing how they can get it all done, they give up before they even start.

That’s me, now and then.

My driving lights are lighting up that sailboat

So, two months ago, when I made my list of the top half dozen things to get done before departure, I knew the last was far bigger, but I couldn’t overwhelm myself. I didn’t want to paralyze myself with indecision. Now, I know many of the readers here are successful boaters because they just see what needs to be done and get to doing it.

In the same way half of all students are impervious to the adults in their lives who get in their way, be it parents, teachers, or anyone else. They’re going to learn and be successful no matter what. It’s not by chance that the historic graduation rate in the last 50 years continues to be about 50 to 60%.

I’m not in the group. I needed a teacher to be able to at least steer me in the right direction or a teacher who could tell I was bored to death and challenge me in ways the curriculum didn’t. The same way a good teacher will give make-up work to a student in a piecemeal fashion. Do this for me tonight and I’ll give you something else tomorrow. At the same time scaffolding the rigor of the work. So, in a short time, they are whipping out stuff they never thought they could do just weeks ago.

Two months ago, starting with a list of 6 items, I knew I’d do more. I’ve done three times that amount so far. While moving the instruments on the mast, I knew to check the paravane fittings. The clevis pins needed to be checked and I wanted new cotter pins. I also noticed too much wear on the main fitting to the mast, so I needed to add some washers and new pins.

As I did more and more, sometimes taking a week to complete one checklist item, but I also did another half dozen items, that were not on the checklist. I became more confident.

Confidence is the other side of the equation. When I finally completed the LED project, which involved 4 wires, with four conductors each (a positive, and 3 separate grounds that control the three colors, blue, red and green), I was very pleased to see it all worked as anticipated. I had three switches to turn each respective set on or off, plus three additional switches to control the colors, since I figured I didn’t need any complicated controller.

That it all worked, gave me the confidence to tackle the 120v terminal bar, that seemed straight forward, but you never know. When that went well, without me having to redo stuff, I tackled the water heater anode and that went even quicker.

The order I tackled these projects mattered. I have read education studies that when formulating a test, the order of the questions can make a significant difference. The same questions in a different order can make a significant difference in student performance. Teachers have known this forever. If you put the hardest questions first, it discourages students. Why a teacher would do that is a story I will save for the book I’m thinking about writing. But it also goes to our overall 60% graduation rate.

When I took the test for my NMC Master’s license, the lights and signals test was the hardest for me. It was hard enough to remember red over green. Was that fishing or trawling or neither? But the day shapes were even harder for me, since I was not using them myself.

For a week I took practice tests. The passing requirement for that portion of the test was the highest at 93+%; meaning out of 33 questions, you could only get 2 wrong.

During my practice tests, I got anywhere from 65 to 80% correct. Well off the mark.

Test day came up and we took the other three portions of the test first that were easy for me. Then the dreaded lights and signals. The first 5 or 6 questions were “easy” in that I was sure of the answers. By the end of those 33 questions, I was positive that I missed only one!

Well, I missed two, but that was still enough to pass. I was elated, but I also recognized that the question order made a significant difference for me that day. Because I felt confident in those first half dozen questions, I didn’t stress and overthink the rest.

In the same vein, when I started working on the boat projects, I knew the order made a difference.

Since I whizzed through those two things yesterday, I decided today to tackle the Purisan project. Two months ago, I’d not even mentioned it because …

But now, it’s almost done, but that’s for tomorrow’s story.

Less is Not Always Safer, More is Not Always Better

This was written in June 2016, but never published. The recent Trawler Forum post about paravanes made me look for what I had written already and discovered I had never published this. So , here it is.