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Summary for potential Buyers

May 07, 2022 by Lukasz Kumanowski

I am considering selling Meritaten. Not an easy decision but I will eventually need to chose between the new boat (Ilur) and her and since I cannot clone myself I will not have time for both ladies.

Already now, when I start building new boat, I see that work on a new boat happens to collide with work and sailing on Meritaten. And a boat which is not sailed does not feel good.

I’ve placed advertisement for Meritaten on Blocket and I already got several questions for more details and more pictures.

I realize that not all have patience to browse through my whole web page so I will try to gather pictures and facts about Laurinkoster Meritaten in this post.


Meritaten bears masthead rig, sloop. Aluminum mast and boom. Mainsail is new (Sailservice), genoa on roller. Both sails, of course, are Dakron.

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Slab reefing with 3 lines on the mainsail. Boom can also be rolled for reefing.

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I also have older sails, among others red spinnaker.
I was considering adding baby-stag so that I can run 2 foresails. She will then become cutter-rigged.

Main sail sheets are on new Liros classic rope with Tufnol blocks. I installed Barton rail system for improving sail trim, especially when beating against the wind. Transverse beam got reinforced and properly anchored to the structure so that sail force is distributed towards the main hull structure.

Rudder tiller is mahogany-oak composition (original) which I cleaned from damaged varnish, shaped and oiled with Owatrol. It is the only part of exterior which is oiled, all the rest is varnished. Works very well and maintenance is minimal.

Roller above the tiller houses yellow floating line, handy to retrieve MOB or for harbor maneuvers.

I bought drawings for building this boat, I write about them in this post.
Based on these drawings I sourced and installed heavy-duty Tufnol winches as they were originally. They are much handier to use when sailing alone - they are within arm reach while at the tiller.

Boom on Laurinkosters is dimensioned so that steersman at the tiller is beyond its reach. This is very convenient should you happen to make an uncontrolled gybe.

The engine is Yanmar 1GM diesel, very reliable and simple construction. It has installed fresh-water cooling.
I lifted the engine a few years ago, to renovate it and to get access to the hull structure below it.
I repaired all frames in this area and made a new cockpit structure. Engine beds were also renovated and reinforced. New anti-vibration cushions are installed, among other parts.

New cockpit sole forms big hatches above the engine room, secured in place and sealed while at sea. After lifting them one has easy and broad access to the engine and cooling system.

For standard engine maintenance it is enough to access the engine from the cabin. Oil filter, fuel filters and bleeding points can be accessed easily. I built new hatch with robust steps leading to the cabin. Sound and heat isolation behind them is also new.

Once in the cabin you will notice new, mahogany sole boards with brass ventilation holes for better air circulation in the bilge.

Each section can be lifted separately, wide finger-holes are also finished with brass.

Originally this boat could sleep 5 persons but it very rarely happens that more than 3 sail together. Hence I removed least comfortable and least used 2 places in the fore end (fo’c’sle) and rebuild the area for toilet and storage. Batteries also reside there, to counterbalance engine weight.

Three cabin bunks are: port, starboard and pilot-berth, each with each own, small cupboard for personal belongings.

I made new madrases for all berths. Each of them is consisting of 3 parts - that way they are easy to store during winter or dry/wash during the season. I used soft and stain-resistant material for the cover, semi-hard foam for internal stuffing so they don’t “bottom” when you put a knee on them. Very comfortable to sleep or sit on.

It is very cozy at night, at anchor. Picture below shows how it looked before I added internal ceiling - mahogany planks along berths. I added them later on, so that one can lean back on them for comfortable seating.

Without madrases the cabin looks like that:

Central part of the cabin is occupied by foldable table. Originally it was swinging on brass legs, allowing it to swing away but making it very unstable. I rebuild it so it hangs from the bulkhead, leaving more place for feet while seating. It is also much stable now.

The table can be folded when needed, leaving more room to move along the cabin towards fo’c’sle.

I was not happy with the old pentry so I rebuilt it and bought new Origo alcohol stove. It can be hanged on gimbals while in use so one can cook during sailing.

While in “creature comfort” topic - I installed chemical toilet in the fo’c’sle (it is forbidden to use traditional marine toilets in Sweden, at least in the Archipelago).
For sailing during cold weather I installed POD kerosene heater (lysfotogen) with new, copper radiators under the port berth. Circulation is done with new, silent electrical pump. The heater is hidden inside the bulkhead, with chimney emerging close to the mast - out of harms way.

Back on the deck. The boat has its original deck which is thick plywood on ash frames. I maintain it by painting with Hempel marine coat (1-component) white paint. Last time I did it was 2020 and so far it shows no signs of wear.

There are several portholes on the deck, providing more light to the cabin. They are made from heavy-duty, thick glass embedded in plywood. When I bought Meritaten they were finished just with white Sika. I thought it looks ugly so I made brass rings mounted on top of each one, as an additional protection and finish.

The hull is kept bright - varnished, as it was from the very beginning. As far as I know the freeboard was “wooded” (scraped to bare wood) only once in boat history and that was before I bought the boat.

There is absolutely no need to do this on this boat, unless one wants to stain the mahogany to darker color. I never considered that, the wood is beautiful in its current tone and is in its original thickness!

Spring maintenance for the hull is very simple:

  • key the surface with scotch-brite or other abrasive pad

  • clean the dust and degrease with Epifanes thinner

  • varnish

Every few years one can sand a bit more varnish, to inhibit too thick build-up. Sanding paper 180 or 240 is all what is needed. I did that last year so for the next few years it is not necessary. This way the wood maintains several coats of varnish but does not develop bubbles when the layer becomes too thick to detach from the surface.

As for hull integrity there are no jobs which would need to be done for many years. I fixed all what was needed for safe sailing:

  • repaired all broken frames: steam bent and one laminated. Laurinkosters are built according to the same principle as Colin Archers so every second thin, steam-bent frame there is a thick, laminated oak frame. There were a few broken steamed frames and one thick frame. I repaired them and built new floor timber (bottenstock)

  • 3 keel bolts are replaced

  • there was one leak from the deck towards breasthook on the bow. I made a new breasthook and repaired the deck

Every winter the boat is soaked with linseed oil (raw) from the inside, to re-moisture the wood and maintain its elasticity.

That’s all to it, she is a joy to sail and I never felt unsafe, even in harsher conditions.
The boat sails firmly and easily single-handed

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May 07, 2022 /Lukasz Kumanowski
2 Comments

Launching!

May 06, 2022 by Lukasz Kumanowski

Beautiful weather for launching!

We start early in the morning. Meritaten is ready since yesterday, just a few things to pick from the deck and Anders comes with tractor and launching cart. We roll out into daylight!

I drive behind towards the ramp. In such moments one can fully appreciate how big Laurinkoster is, compared to even such a big tractor! But once in the water most of the boat disappears and she becomes moderate - if not small - boat, in modern standards.

Promenade through Rosättra…

And off we go, into boats right element!

It went as usual - no dramatic water ingress. We could float her out of the cradle right away. She will stay here for a day or two until the hull swells and becomes tight.

I check if closed through-hulls are water-tight. Yep, they are - not a drop.

Anders lifted my mast from winter storage, I can start preparing it for stepping in coming days. We do that when the hull is fully swollen and tight.

May 06, 2022 /Lukasz Kumanowski
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The night before launch

May 06, 2022 by Lukasz Kumanowski

I could not leave work earlier today so it was dawn when I arrived at the boatyard. A few things needed my attention before launching tomorrow.

It was very sunny and warm today so I expected to see a few more seams opened. Not that much it turned out but just in case I painted them with diluted (white spirit) tar.

Dyviken closed with new plug.

Offer anode is good enough to stay for this season. Propeller sprayed with second layer of antifouling.

Name plates installed.

Now to Yanmar-san! First comes belt tensioning - I leave it slack for winter storage, it saves the belt from too early wear.

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While in the “engine room” I checked bilge pump. It started fine although I need to really invest in a new one - this one is quite old already.

I flushed the cooling system with fresh water - to remove glycol before going into sea.

Lastly I drilled holes between the cabin and cloth cabinet inside the bulkhead, to route heating hoses. Both convectors will be mounted under starboard berth, to shorten the line and avoid abrupt curves. This should, in theory, allow for self-circulation of hot fluid after the system gets into temperature. I have water pump anyway but it would be nice if it works without need for electricity.

Kerosene heater GeHå POD is mounted inside the cloth cabinet, with chimney emerging just behind the mast. I plan to replace plastic reservoir tank with original, brass tank but I need to first scrape ugly, gray paint which someone covered the brass with. This season we will live with non-original but functional plastic tank.

There we go!
All done, launching is scheduled for tomorrow morning.

May 06, 2022 /Lukasz Kumanowski
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Bottom paint

May 04, 2022 by Lukasz Kumanowski

I try to keep the boat’s bottom covered as long as possible, to protect it from abrupt moisture changes. Launching day is on coming Friday so I had to remove Meritaten’s “winter dress”.

The main task for tonight was bottom painting. I used the same paint as last season - it prove to be efficient in keeping marine growth at bay, even when painting with strongly diluted paint.

Gas mask is a must when working with these paints - they smell ugly when wet and certainly can cause a headache due to toxic fumes.

I checked that there are no new opened seams, that’s good. Tomorrow is the last day before launching so I will go around the hull to see if any new openings emerge.

I checked with Anders if he can supply me with mahogany lists, in case I decide to re-glue the hull after this season. He can. I will decide if I want to do it on Friday - depending on how the launch will go. So far I had no problems with too much water ingress during the “dope” - nothing which could not be handled by my bilge pump - but re-gluing the hull will add tremendous strength to the boat and that is tempting. It’s never too much!

Second point on agenda for tonight was to check the batteries. Both seems to be fully charged - I loaded them before the winter - but just in case I top them up anyway. Will be useful for bilge pump to have enough of “juice” for a few hours after launching, before the hull swells and becomes tight.

Before leaving I started sorting out installation of POD (GeHå) heating system. The second convector has arrived recently from Toplicht - men, how nice it is, with its copper mesh!

Tomorrow I will connect all components and hopefully fill the system with glycol, to be ready for action. It is still chilly at nights - with temperatures just below zero - so having heat system operational is a plus.

POD system is no longer produced and it is getting hard to find used ones. Back in the days I bought a supply of spare parts to my system so I can keep it alive for many decades.

Installation instructions are still available on forums but Internet is volatile. Below are the scans from instructions I gathered while searching for data.

May 04, 2022 /Lukasz Kumanowski
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Paying seams

May 03, 2022 by Lukasz Kumanowski

With short notice I managed to book launching for coming Friday. Just a few days left for final touches but this spring is storming already with dry wind and sunny weather. A few seams of Meritaten’s hull have already opened, one should not wait too long for launch.

I temporary seal opened seams with Stockholm tar (sold as Farm 80). Just a smudge above the seam, not really pushing the paste between planks. The aim is to slow down water which would otherwise storm through hair-wide openings between planks. All this to buy time for wood to swell and tighten the hull. On mahogany hull swelling takes around one day. Without sealing cracks it would be very dramatic launch, with bilge pump taking the hit for a few hours.

There are many ways of preparing wooden hull for launching: smearing seams with butter, gluing paper tape or “dusting” the hull by opening a bag full of wood dust under the boat, in water. Wood dust will get sucked between planks and seal openings. In the old times people even used ant stack for that. The only drawback of this last method, apart from being dramatic and killing poor ants is that particles get stuck between planks. When wood swells they will be compressed between planks and eventually damage adjacent surfaces. This will lead to even greater leakage next spring and eventually the hull will never get tight - with damaged seams leaking water even after wood swells.

Butter method is better as butter is soft and will be squeezed out of the seam, with remaining fat being absorbed by wood. Paper tape works fine, too - just that the boat will have paper spaghetti attached to the hull for a few days after launching. Tar method is the easiest - just smear it above seam openings, to hinder water flow. Wood swells and closes the seam and tar just remains outside as a thin bulge, easy to scrape after the boat is recovered for winter storage.

Meritaten’s hull was originally glued with Cascofen. Very good glue at its time but after 60 years it disintegrated into powder, leaving the hull as pure traditional, plank on frame construction.

I’m considering re-gluing it, at least below water line, with epoxy. The bottom is in need of scraping anyway so if I do it next winter I may as well attempt re-gluing the hull. That will result in reduced launching-drama and result in much stronger hull, as it originally was. But it is a major job, very time critical - it is important to do it when wood’s moisture content is correct so that gluing is done in hull’s “nominal” state.


I finished paying seams when it became dark. Varnish is now fully cured and the job turned out very well.

Tomorrow I’ll bottom paint the hull and start the engine. Batteries will get top-up recharge and we will be ready for launch!

May 03, 2022 /Lukasz Kumanowski
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