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Sheer strake, port.

September 18, 2022 by Lukasz Kumanowski

Last strake on port side. A bit challenging at first to position as there are no more landings on station molds and bulkheads end before top (bottom right now) of the strake.

I clamped it temporarily and gave my brain some time to process the thing. My kerosene stove needed service again - it was outputting almost no heat. It took me a few hours to clean it, empty fuel tank (messy job) and adjust the wick. In vain - it was not burning as it should. In the end I decided to change the wick - it was clogged with dust and I could not burn it out anymore.

The problem is that these stoves are gone from Jula. Impossible to find one in the whole kingdom. That’s certainly due to the ongoing war and energy crisis, folks are hamstring heat sources in case shit hits the fan. I was glad that I bought it years ago but I forgot to buy spare wicks. These are also mostly gone now but I found that in nearby city they still have one. Jumped in the car and rushed to get it - this stove is crucial for my boat building, without it I would have to use IR-lamps which will probably yield the whole business uneconomical with current electricity prices.

Turns out they had two these wicks! Well, now they have none…

After wick change the stove came back to life. I will have to remove it from the shed every time I produce dust.

As the boat is now very close to it I reinforced my home-made heat deflector to be more robust. I leave the stove running during nights, to cure epoxy, so I need to be sure that all stays put and fire-safe.

With 8 C outside the shed keeps 23 C in the coldest corner. Additional isolation and new wick are doing the job well.

Back to boat-building.

Before I started building my Ilur I was planning to make sheer line very dramatic, with pronounced curvature, high stem and transom, like American boats.
Since then I changed my attitude and find balanced, delicate line of Ilur’s sheer more appealing. During the build I run across so many details and solutions which show that Francois Vivier really has refined and though through this design that I decided to build her as close to original design as possible. It is just so good - why change it?

Shear line shall land 17mm above bulkheads ends.

When the plank is positioned like that the edge of station molds - all three - is exactly on the edge of the plank.

To maintain these 17mm gaps during gluing I clamped small pieces of wood, wrapped in plastic tape, on the strake. They will guide me when I place the plank on glue and will prevent the plank from gliding away from its designed position.

For easier alignment and as a support I clamped L-shaped piece of plywood onto three station molds.

Apart from gains - both on transom and stem part - there was no need for beveling the previous plank. At the transom I embedded plank edge in transom’s crown.

Landing on design line at the stem. I didn’t bevel this part before planking, leaving it to this moment. It shows that I could have done it in the first place - the plank lands nicely on its lines.

The strake dry-fitted, masking tape set - I could finally spread the glue and finish the job.

Clamping this last strake was a bit complicated, I had to be creative.

With the stove running on 3/4 power I left the shed, happy with the result.

Next will come sheer strake on starboard and planking will be finished!

September 18, 2022 /Lukasz Kumanowski
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No. 9, port

September 17, 2022 by Lukasz Kumanowski

With this board on it is only sheer strakes to complete planking.

I have not enough room in my shed to look from distance if the sheer is “sweet” or not so I will have to depend on marks transferred from templates.

Stove is on max heating so temperature inside reaches 25 degrees. Boatshed sealed tight.

By the evening the glue should be cured so I can start sheer strakes at night.

September 17, 2022 /Lukasz Kumanowski
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No. 9, starboard

September 15, 2022 by Lukasz Kumanowski

Last strake before sheer strake.

After servicing my kerosene stove I can cure the epoxy in 25 degrees. Weather is helping a bit - it does not drop below 10 C at night. Nice autumn aura.

Moderate bevel for this strake, only a bit dramatic at the transom.
All clamps in use.

September 15, 2022 /Lukasz Kumanowski
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Eight strake - port

September 15, 2022 by Lukasz Kumanowski

Offered and accepted by the boat.

Curing overnight, we are lucky with mild temperatures.

September 15, 2022 /Lukasz Kumanowski
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Eight strake, starboard

September 11, 2022 by Lukasz Kumanowski

Everything with this plank went nice and smooth. It has never happened before!

Last night I dry-fitted it on the boat, as a routine process of determining where and which clamp will be needed, identifying difficult bend/twist areas and making witness marks for exact positioning.

There is only one slight twist when landing on transom. A bit special clamping was in order.

Today the summer came back for a beautiful Sunday. Parliament elections in Sweden - it will be a pleasant walk through the forest to vote!
I went up early, to prepare the strake for gluing. I wanted to use the weather and temperature as much as possible.

Started with kerosene stove service. I had to wet the wick with alcohol these last days to get it up and running but today it was high time to troubleshoot it.

Turns out that the wick gets clogged and prevents the stove from firing up. It must be all the dust in the air when I plane boards or swipe the floor. I will have to cover the stove every time I produce dust.

I burned-out the dirt, causing a bit uncontrolled fire for a while, and the wick was like new. Done!
Back to the boat!

Cutting bevels went smooth and quick. This strake required quite dramatic bevel, almost to the edge of the previous plank.

Gain cut at stem only.

Every time I am in doubt I look at Glypto.

She is a traditionally build lapstrake lady, studying her freeboard is useful when making her bigger sister.

With 17 degrees in the shed I easily spread epoxy and clamped the strake.

The plan was that after we come back from elections I will start the stove and accelerate epoxy curing.
Which I did.
But it took us a bit longer to come back - you cannot leave these guys in the forest, can you?

September 11, 2022 /Lukasz Kumanowski
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Seventh strake, port

September 10, 2022 by Lukasz Kumanowski

It goes much faster now, cutting bevel is swift, gain on stem is straightforward.

On the transom I made shallow gain only as the plank is turning at such angle that I see no way of hiding its edge.

All clamps in usage.

I had to be creative with clamping at the transom.

September 10, 2022 /Lukasz Kumanowski
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Give it time!

September 08, 2022 by Lukasz Kumanowski

It passed 12h since I clamped the strake so I rushed into boatshed to remove clamps and prepare the hull for another strake. It was close to 0 C at night, went up to 15 C now so I was quite certain the glue was cured. Epoxy rests left in a mug on my workbench were hard and cured.

I removed all clamps and turned the hull on the other side. Placed a new strake and started dry-fitting it when I noticed that gain at the stem looks a bit too wide. I was very proud of myself yesterday but now it looked like a sloppy job.

To my horror I found that epoxy in the stem area is not yet fully cured so the plank could spring a few millimeters and it would eventually open the joint should I not notice that.

While rolling the hull back into steady position and quickly gathering clamps I was wondering why it happened. I mixed one batch of epoxy for the entire joint so it is not the case of improper ratio.

With a blow of wind outside it came to me instantly - stem part of the boat is close to shed’s gate. Temperature here is lower than deep inside, where the kerosene stove sits. It is as simple as that - with low night temperatures I need to leave broader margins for glue curing time.

So there she is, clamped back to fully cure before I start on the next plank.

Let’s call it process pause and not try to speed up things too much.
It ain’t lead nowhere.

September 08, 2022 /Lukasz Kumanowski
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Seventh strake installed on starboard

September 07, 2022 by Lukasz Kumanowski

Quite straightforward installation. This strake closes midships flotation tanks.

Excess glue used to make fillet around these tanks.

Louve is occupying now most space in my shed.

September 07, 2022 /Lukasz Kumanowski
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Seventh strake, starboard. Bevels, gains.

September 07, 2022 by Lukasz Kumanowski

I find it extremely useful that I can tilt the boat sideweys, so that new plank can be offered almost horizontally.For these strakes I use maximum tilt as these are actual freeboards.

I’m not sure if this is by design but once in that position the jig supports become almost horizontal, giving a nice base for laying the plank while I clean the edges or cut gains. Very useful.

Quite straightforward strake to clamp.
I use now mostly these quick-release Bahco clamps. They are not exactly cheap but very useful, especially that one installs them with just one hand and they are a bit elastic so they adjust their shape by a few degrees if clamping surfaces are not parallel. Having 200 kg pressure weight is more than enough for gluing a plank.

Scribing overlap line on unbevelled plank with custom-shaped pencil.

With this plank I stop cutting gains at the transom, only bevels. The angle is too abrupt so it does not make sense.

All bevels cut, the only remaining thing before gluing is to cut stem gain. I leave it for the next session.

September 07, 2022 /Lukasz Kumanowski
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Sixth strake no.2

September 05, 2022 by Lukasz Kumanowski

Done!

September 05, 2022 /Lukasz Kumanowski
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