A day late in getting out this weekly update and I will keep it short but it has been both a very busy and successful week as we get closer and closer to our “throw off the dock lines” day. Lots and lots of jobs on the “Must be done before departure” list have been getting checked off and if all goes well today we hope to leave tomorrow!
Christine has been busy with electronics and computer related jobs onboard getting all six of our monitors working properly with the Upper and Lower Helm computers, getting internet connectivity sorted out for when we are underway and going up the coast of Turkey towards Marmaris and just playing that always fun version of Whack-a-Mole as each new “Mole” pops up. I’ve been busy getting the Tender and the Davit system ready to launch and yesterday we both worked on bringing 500kg/1100lbs of lead pellets aboard that are now safely ensconced inside the watertight coffer dams on either side which are there for the potential future addition of active stabilizers. But I’m getting ahead of myself so let’s jump in with a quick Show & Tell of what all we’ve been working on this past week.
Our workload has been reduced a bit with the addition of a new member of Möbius’ Crew, this little turtle who is one of many we regularly see around Möbius and inside the Finike marina. Turns out he just LOVES eating the green grassy growth that is already starting to appear along our black boot stripe and is a real pain to scrub off.
As you may recall we hauled out a few weeks ago and gave our InterSleek “Foul Release” silicone based bottom paint a close inspection and found it to be just fabulous with almost no growth at all after almost a full year in the water with very little movement. However the black boot stripe above the bottom paint and waterline is a different story and this area which is kept constantly wet as the water moves up and down the hull a bit and is getting lots of sunshine all day long is the perfect garden for the “green slime” and grass like plants that grow here. No big deal for the boat really, just annoying and so we were delighted to find that we now had this new crewmember who likes nothing more than to munch away on the grass. Thanks buddy, we can use all the help we can get. Not sure about getting his visa for leaving Finike and Turkey but we’ll see.
As I mentioned earlier I got a good workout yesterday carrying 500 kg of these tiny lead pellets which we had purchased last year and have been sitting in a Bulk Bag on the dock behind Möbius. Christine worked on the dock to transfer about 40kg/88lbs of pellets into thick plastic bags that were then double bagged inside some heavy duty bulk bags which I then carried onto Möbius and down into the Basement under the SuperSalon. I had previously unbolted and removed the watertight cover plates over the two coffer dams on either side about midship on the hull which we had built just in case we decide in the future to add active stabilizers, most likely Magnus Effect type to help reduce roll more than our paravanes do.
For now though, these watertight compartments made the ideal spot to put these lead pellets and improve the comfort of the ride by slowing down our otherwise “snappy” roll resistance. Working with Dennis our NA, we set up one of the design criteria for the hull to have a roll period that would have slightly less than the theoretically ideal roll period which is the time a ship takes from upright position to going to a particular angle on port side and then going to a angle on starboard side and then again returning back to upright position (zero list position) during natural rolling. We did this way so that we could dial in the Goldilocks roll period after the boat was built and fully loaded up to our actual weight/displacement. A shorter or faster roll rate provides more safety of returning the boat to upright but this faster or “snappier” motion can induce some nausea for some people and make crossings in rolly conditions less comfortable for the crew. Slowing down the roll is relatively easy to do by adding some weight/ballast that is further outboard and higher up than the centerline ballast, whereas speeding it up is very difficult once the boat is built. Hence we purposely went for a slightly faster roll period in the hull design knowing that we can then add some lead in the best locations once we have the boat in the water and in her natural trim and weight. So we will now operate Möbius with this additional 500kg of lead in the coffer dams which puts it well outboard of center and a bit higher up at just below the waterline, and se how this slightly slower roll rate feels and works for us. If we want to make further adjustments either way we can either remove or add more lead.
Being in small pellet form makes it easy to fill any size and shape spot we want and we are keeping them in these double bags for now so we can change if needed. Once we think we have the ballast and roll period at the just right, just for us Goldilocks point, then I will remove remove the bags of lead pellets, coat the aluminium with epoxy resin and then pour the lead pellets back into these spaces. Then I will pour some thickened epoxy over the top surface to fully encase the lead with the hull and keep it fully sealed to prevent any water from mixing with it which could set up some dissimilar metal corrosion.
As you might imagine this was a job that we were both very happy to check off the list and while we were certainly pooped at the end of the day we had big smiles on our faces and treated ourself to a “date night” of sorts and went out for dinner at the little café here in the marina.
Finishing the Tender Console
The other much larger job that got checked off the ToDo list this week was getting our tender we’ve named Möbli launched off the Aft Deck and into the water for the first time.
I spent the first few days of last week finishing up the last of the wiring that connects the Yanmar 4JH4 HTE 110HP engine to the Castoldi 224DD jet drive and the control panel and gauges for both in the center console. This Yanmar/Castoldi combination is a purposely matched pair and the two companies created a very complete kit package that provided all the custom wiring harnesses to plug into both the engine and the jet drive and connect these into the supplied instrument panel that is now mounted in the console.
Most of these connections were done with very high quality quick connect watertight fittings but there were a few wires that I needed to look after to connect to the 12V AGM battery.
A bit time consuming but not too difficult and this is how it looks so far.
I’m very happy with how this has turned out so far and will work on getting the Standard Horizon VHF and Vesper AIS wired up after we launch and test Möbli out.
One more detail was to install the fuel filler cap in the cover of the 80 liter fuel tank up in the bow. I had previously installed the rubber fuel lines that run under the floor and back to the Yanmar so now I just needed to remove the cover plate, drill the hole for the filler cap and bolt that back down. Put in 15 liters of diesel for now and she should now be ready to start up for the first time.
First though, we need to get Möbli into the water so there is sea water supply for the engine’s heat exchangers for engine oil and fresh water coolant and for the wet exhaust system.
Most of you will have seen in some previous updates a few weeks ago that I had all the rigging for raising and lowering the Tender inside the Davit Arch as well as rotating the Arch itself to launch the Tender over the Port side.
A pair of triple blocks provide a 6:1 mechanical advantage for the Tender Lifting lines that go to the winch you see here on the vertical leg of the Davit Arch.
Inside the Tender at each corner there is a welded in attachment point where the Lift Line snaps into.
Then there is a separate set of rigging that controls the pivoting of the Arch itself so that it moves the Tender sideways off the deck clear of the rub rails and then the Lift Lines are let out to lower the Tender down into the water.
This Pivot Control Line of PCL leads through 3 blocks and then over to the bit Lewmar 65 electric winch which allows you to rotate the Arch out and back in.
With that all hooked up it was launch time and little Möbli was soon testing out the waters beside Möbius.
She sits pretty much right on the waterline predicted in the 3D model which was good to confirm and put the exhaust pipe a bit more than 150mm above the water. I could then hop in and start it up and was delighted when the Yanmar fired up at the first touch of the start button. Must have been taking lessons from Mr. Gee!
So an eXtremely big milestone for us and puts us in position to head out to sea in the next few days.
Of course these are boats and so there are always those pesky little Moles that pop up and need to be whacked down. Two popped up with the Tender; there is a small pinhole leak where the Castoldi bolts up to the bottom of the hull and then the larger issue is some problems with the Davit Arch setup that will take more time to “whack” down. The leak is very minor and slow but to be safe I didn’t want to take it out for a test run but I was able to run the engine for about 20 minutes and test out the steering and bucket controls on the jet drive while Möbli was tied up to Möbius and get the oil and coolant up to operating temperature. All of that checked out perfectly; ran well, oil pressure and temperature were right one, steering and bucket control which is how a jet drive directs the thrust of the jet to move the boat forward, reverse and sideways. So VERY pleased with how the Tender turned out and can’t wait for that first test drive which will hopefully be in a few weeks.
For now though, the Tender is back in the chocks on the Aft Deck and all lashed down and covered ready for us to head out to sea.
Christine is working on a video collage of building and launching the Tender so watch for that to go live here in the next few days.
We still have a few small jobs to get done but right now it is looking good that we will be able to finally throw off those dock lines some time tomorrow and leave Finike in our wake as we start working our way up the Turquoise coast towards Marmaris. As usual we are on The No Plan Plan so we will take our time and enjoy stopping wherever calls our name as we motor up this beautiful coastline. We think we will use Marmaris as our jumping off point to check out of Turkey and head over the explore some of the Greek islands in June. Then we have our two granddaughters, with their pesky parents who seem to insist on coming along (just kidding Lia & Brian!) flying in to spend most of the month of July with us so that’s the ultimate prize that is driving us forward from here and a BIG part of what we have build Möbius for so we can’t wait for their return to join us aboard and make more memories together as we explore Greece and perhaps Italy.
As always, thanks for taking time to join us here and please keep those comments and questions coming by typing them into the “Join the Discussion” box below and with luck I’ll be sending the next update from some beautiful anchorage between here and Marmaris.
Yippie !!! I am very happy for you…being so close to departure. I have really enjoyed all of your construction posts. I’m sorry for your troubles w/Mr. Gee, but they gave us more opportunity to experience such a lovely piece of equipt. RE your stabilization: I have always wanted to incorporate a “flume tank.” They have such simplicity. But I guess are often difficult to incorporate into living quarters, without impacting the layout. Anyway…all the best.
Hi JZ and thanks again for your kind words and compliments. Glad you’ve been enjoying the blog updates.
Back in the initial stages of designing the hull with Dennis and roll attenuation in general I did look into flume tanks and other systems that moveable water ballast in various ways. Rightly or wrongly I concluded that they were more trouble than they were worth in terms of the compromises required to fit these kinds of tanks, especially the ones that are located up high and athwartships. I get the attraction of them being more passive and see how they could work very well on work boats where I think they are most commonly found. Paravanes seemed to be a better fit for us with our experience in handling lines on sailboats and their simplicity. Time will tell how well this works out for us on Möbius. You may have also read that we designed and built the hull with coffer dams on both sides with all the internal ribs and supports that will allow for the installation of active stabilizers at some point in the future if we decided to add them. If I were to do so now I would most likely go with one of the stabilizer systems that are based on the Magnus Effect with a rotating cylinder that extends out to the sides of the hull. These can be rotated inboard to tuck along the length of the hull with a pipe “roll bar” around them to protect them from ice or other collisions. I think that if we were to go with active stabilizers these would suit us best so we’ll see how we feel in a few years of running with the paravanes.
So great to know you casting the lines! Safe passage and always a hand of water under the keel of Möbius and Möbli
Thanks Philip. Great to see you back enjoying yourself in Africa and look forward to more photos on FB from you as your adventures continue as well.