THREE STEPS BACK AND A NEW THEORY FOREWARD

The bowboard daggertype did not slide up and down to my satisfaction.

I made a new board rotating around an axis. However the line arrangement became to complicated to my taste. I wanted to be able to chance the lines at sea.

Next idea to keep the bow into the wind, making her nicely fore-reach in a storm was to have a mizzen on the rudderpost and sheated to the rudder like the Thames barges a hundred years ago.

However being modern I wanted to make a solid rotating wing-sail using a VX40 rudder. Even that turned out to have its problems, but if at first you do not succeed, try again.

The final theory is to lean the mast to lee. That will give the boat weather helm, creating the same effect as a bowboard or a mizzen but much simpler.
The above picture shows a mock up of the strut giving the mast additional support in storms. The tilting angle is 30 degrees. In addition I have the shrouds.

At the moment I am repairing the damage I have done to the boat. Taking away the case for the bowboard and filling up the big hole.

COPPER POWDER

Thanks to the ingenuity of Beppe my web master my blogg now seems to work. Apparently there are a thing called html which somehow showed itself instead of the picture.

The above is the sides of my centerboard case the inside surfaces difficult to reach on the finished boat i have therefore sprinkled them with copper powder to make them antifouling. As copperpowder solves not well i epoxy i have put peelply on top. After tearing it away one gets a nice smooth surface. It is also good for the underwater part of the hull.
Greatings from Yrvind back in business.

SMALL WINCH OR LINE TENSIONER


This is line tensioner is for the jib. I have redesigned the rig. There is no longer a forespar nor a stay for the jib to be hankt on to instead its leading edge is made of spectra or dynema and tensioned. Hence the winch.
It gives a very big force fore its size and weight and need no servicing
An other great advantage is because the standing part is made of carbon it can be laminated to the deck spreading out the load on the sandwich construction

Unfortunately the software to this blog still does not work. This has been written blindly. When it works properly I will write more.

A WORLD SPEED RECORD

Bamboo can grow 121cm 47,6 inches in a 24 hour period with one hour burst of speed more than one meter. That is a world record and impressively fast. But my my boat will be much faster. She may average 3 knots or 133344 meter in 24 hour. But that is slow compared to a airplane which crosses oceans i a few hours. However the sense of speed of bamboo growth or my boats speed is big and that is one of the reasons why it is not boring to spend months at sea in her.

FREQUENTLY ASKED QUESTIONS WHY A SMALL BOAT

Body and mind is one.
A small boat gives a healthy body.
A healthy body gives a healthy mind.
A big boat gives comfort, but comfort makes you fat and bored.

WHEN WILL IT BE READY? THIS IS THE MOST FREQUENTLY ASKED QUESTION.

Good work is the determining variable not time. I like doing good work. I dislike haste. Therefore when not proud of what I have done I redo it until I am satisfied. Dogged does it, and one day the boat will be ready, but when I do not know and to me it is not important because I do enjoy building her.

Publishing problems

By Beppe Backlund Webmaster

Yrvind.com is powered by the well known blog hosting service Blogger, owned by Google. Each part of the site are one separate blog. When Sven is publishing posts, he log into Blogger and make his writing with the tools provided by Blogger. Blogger then transfer the results (via FTP) to yrvind.com located at an webhosting service in Sweden. From day one of this websites life and until the beginning of august ( over a year) this arrangement worked just fine. Now everything is a mess. Sven is unable to properly upload images and publish posts. This situation is frustrating since Sven have a lot of work done on his boat and he want to be able to inform all of you out there.

It’s also frustrating for me as a webmaster. Because i can’t do anything about it. Just sit and wait and hope the people at Google fix the problem. One good thing is – we are not alone. There are many people round the world experience the same problems. Please feel free and click this link leading to The Blogger Help Forum http://www.google.com/support/forum/p/blogger/thread?tid=3ec5d1e5f9f66b5d&hl=en Make your voice heard and write some lines and tell them you have been waiting so long to read more about Sven and his interesting boat project.

UNDER AFT DECK

If at once it does not work try again. The blogger gives trouble, when I am inserting pictures. However by repeating the insert many times finally they are accepted, so here are some pictures of resent work in the aft part of the boat.

Below is the seat and half a waterproof bulkhead which serves as backrest. Behind it and and below the aft deck is the chart stowage.

The chart drawer.

Below it on each side is my water stowage. It is a close fit, but it works thanks to the elasticity of the polyethylene canisters.

Here they are in place. At sea they are tied down with ropes.

ON THE IMPORTANCE OF BOWBOARDS

The above and below pictures shows the first steps in installing the bowboard.

Matts chinerunners and my big rudder will supply leeway prevention under normal conditions. But as I am trying to do a 50 south to 50 south westward Cape Horn rounding I will surely encounter conditions not always normal. To cope with the expected westerly hurricane force winds I am equipping YRVIND.COM with a big bowboard. Average keel area to sail area in modern fin keel production boats are 3.5 % with a spread of 0,75 %. Accordingly not many boats have more than 4.25 % keel area compared to their sail area. The area of my bowboard exceeds that many times. With a span of 0.78 meter and a chord of 0.40 meter her area is 0.312 square meter. YRVINDS working sail area is about 3 square meter in a fresh breeze. This gives her bowboard an area of more than 10 % compared to her sail area. That is roughly three times as much as on a production boat, not counting contributions from her lifting body hull, big rudder and chinerunners. Most likely no other boat has ever had so much lateral area compared to its sail area or wind resistance. The main reason for the bowboard is that it will act as a pivot point in heavy weather. It will let the boat weathercock as it is forward of the sail area and resistance. That is a much better way to avoid being driven back by storms than using see anchors. 1989 sailing from France to Newfoundland in my 15 foot Bris I encountered a series of gales lasting eleven days. When the clouds parted and I could get a few altitudes of the sun with my sextant I found to my joy that I had gained westing. Bris had a bowboard. It was it that weathercocked the boat so that she was not driven back. Yrvind have a bigger bowboard and less wind resistance thanks to her lower and narrower hull and her wing mast. With the bowboard down one can lay very close to the wind with a very small sail area. The boat is slowly and compared to other methods comfortable forereaching. Because she is so close to the wind she is taking the waves nearly head on and not much water is coming on her deck. Also unlike with a sea anchor one is able to maneuver, to get out of the way of a ship not under command.