May 26, 2012


I will give a free illistrated public talk in ÅmĂ„l the 30 May 2012 at 19.00. Adress Karlbergsgymnasiets aula. Everyone welcome.

May 23, 2012


Yrvind Ten is now on even keel. I turned her with the moulds.

Click once or twice to enlarge.

First time in the boat, plenty of space. The deck starts at the top of the moulds. There will also be a deckhouse, not for comfort, but to give her rightning moment by boyancy the many times when she will be upside down.

The moulds removed.

A close up at the happy boat owner.

As always after an operation there is some cleaning up to do.

Finally one fine day the model got a bit more wind. By GPS she is making 1,5 knots. Speed increses with the square root of the waterline. The real boat is 8 times longer. Square root of 8 = 2,828 multiplied by 1,5 is 4,2 knots. The model with mast spars sails and their supports got to heavy, 3.631 kilos that multiplied by 8 cubed gives the full scale weight to 1859 kilos. That is plenty of spare capacity.

Do not get excited at the speed. Down the roaring forties there be pleenty of storms headwinds and calms and all kinds of truble. If I can get an average speed of two knots I be happy.

To bee continued…

Regards Yrvind.

May 20, 2012


The outside laminate is now done. For that I needed help. It took some time before frends of mine from all over Sweden cold come on the same day. This is an important step becouse now I can take the boat out of the mould and turn her around and make her mobile for the first time. Click once or twice the  pictures to enlarge them.

This is the boat before the start.

Here the crew are almost done. Everything went very smouthly. After four houers we finished. The new NM-epxy  625 with its excellent wetting properties and exteremly long open time made work easy.

The peel ply is coming on. Captain Thomas closest to the camera. We sailed an old Albin Vega from Sweden to Florida. We have now also written a book about the venture, to be published 27 of August.

Job done. The crew pose for a group picture. From left to right, Beppe webbmaster, Yrvind, Peter Ohlman son of one of my class mates, Jonas has built and sailed a boat to my design acraoss the Atlantic together with his wife Ingrid, Jerker from  TBB Finance group, he works in the same building and is always willing to give me a helping hand, Monica Ohlman, wife of my Class Mate. Mattias small boat builder from VÀsterÄs, the above mentioned Captain Thomas, finally Lars Ohlman, my class mate from childhood. I thank them all for an excellent job and for having survived my bossing.

Laminating done.

Today I have done a bit of cleaning up and peeling the peel ply before the NM-epoxy sets to hard.

Last week we tried to sail the big model. There was no wind. Tomorrow we hope for some.

To bee continued…

Regards Yrvind.

May 3, 2012


I have not expressed myself clearly. This has lead to misunderstandings by Manie B,  Angelique and probably others. It may therefore be of general interest to elucidate some points.

My models are giving me ansvers to two questions. Can a boat that heavy and so short be driven by a small sail area. The ansver found is yes. The next question can a small boat that heavy and fat and beamy be directional stable downwind, – uppwind it is easy. The ansver again found is yes.

I am the designer, the builder and will be the Captain of Yrvind Ten communication between these differnt doers do not have to be with paper. There are many things to do. Therefore my models do not show all the details.  It definitly would be better to do proper calculations and have proper drawings. It would be safer way, but it would be more boring and take more time. Therefore the model has no foreward lateral area. The real boat will have that, probably a pivoting centerboard. I have good experience from my own boats and from boats I have designed for others. Several ones have crossed the Atlantic so equipped.

Two times I have spent six months in the roaring forties in small boats. That together with extensive reading and talking to other sailors have given me a good idea of the weather there and there is a lot of missunderstanding.

It is a completly different weather pattern if you are a stationary observer or if you are moving with the weather systems like the clipper ships or the Volvo racers or the Vende singelhanders. If you are moving with the wind at from my point of view very high speed you will get a lot of westerly winds. If on the other hand like Yrvind Ten you move at average two knots you are almost stationary and you will get a lot of easterly winds, not only light winds but also gales. I once lost 150 miles in an easterly gale laying to sea anchor. I do not belive in them anymore. They are for boats that have a fear of capsizing. If you do not mind capsizing keep sailing against strong winds.

There are on the average two or three low pressures coming up from the Antartic each weak with very cold winds. The stationary observer will experince north west winds that will go anticlockwise to south west and the turn to light easterly. But other winds will also happen. The roaring forties is not a strong trade wind, not for a slow mowing boat. A slow mowing boat will experience a lot of windward work and need an efficient lateral area for and aft.

To be continued…

Regards Yrvind.

May 1, 2012


There has been some progres. The hull is now shaped. First I used a Festool power planer to get the rugh shape, then I used longbords muscel powered first grain 24 then grain 60 finally the finishing touch with a Festool rotex orbital sander. The wedges made a good fit. On a few places where seweral wedges met i drilled a 20 mm hole and pluged it with a Divinycell plug. The load waterline at 1500 kilos and the centerline are marked.

I have also tested the big1:8 scale model, she confirmed the results from the 1:20 scale modell, that is, I am on the right track. I will improve the down wind performancet by making two more positions for the masts. The added new positions will be, side by side, forward of the hatch, one on each side of the deckhouse. Keep it simple they say. Sometimes an improvement can be worth its complication. Plankton breed by dividing, we breed by sex. It sure is a complication but might be worth it.

Yrvind Ten before shaping.

Click on the pictures once or twice to enlarge.

After shaping.

A Divinycell plug inserted in the drilled hole.

The plug is cut and sanded down. Plug and wedges makes a good fit with the Divinycell quadrangels.

Using the Festool plane. The dust extractor keeps the workshop clean.

The tools used.

The 1/8 modell bow view.

The 1/8 modell fram behind.

The more I work with Yrvind Ten the happier I get. Of course the project is ridiculus  but so is plying golf and climbing high mountains. What counts is to do something difficult. That is whats makes a project wortwhile. We human beings are the only animals being bored except wild animals in captivity. Wild animals are happy without entertainment, spices and modern conviniences. You get happy by working to your limits, not by going fast, slow down and happiness will catch up with you.

The next stepp is to laminate the boat. For that I need a few freinds. Male or female young or old do not matter. Important is If you have a positive interest in small boats and are handy and careful and like to lend a helping hand. If so call me at 0490 21530 between 20 and 22 houers any day. The lamination is planned to take place preferably a saturday, the 12th or 19th or torsdag 17 kristi himmelsfördsdag in VÀstervik. There is no pay and you will get your fingers dirty.

The publishing date for my book is getting close I have to work with the by my editor Malin revised manuscript that will also take some time.

To be continued…

Regards Yrvind.

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