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January 14, 2014

THE RATCHET WHEEL

Building the winches for the lines that control the tiller I needed a ratchet wheels. First I made a prototype in plywood. Then Miki made a one on the computer.

Lena and Mikael boating people here in of Svetsmekano i VĂ€stervik helped me to cut out one to test on their fantastic abrasive water jet of 10 mm stainless steel. That was no problem they can cut out any figure in up to 200 mm stainless steel and most other materials as well to a tenth of a millimeter.

The photo below shows lena with the machine.

Below is the product and the plywood prototype.

Now when I got the pieces I will continue trying to get a good solution.

To bee continued…

Regards Yrvind.




January 13, 2014

A NEW INSIDE/OUTSIDE STEERING SYSTEM

Most ropes have two ends. A good thing for the man that wants to steer from inside and also from the outside. Many a time a I have woken up when the boat got of course. May bee the wind had increased or something else was the matter. Climbing out of the worm bunk and slightly adjusting the rudder was all there was to it. When the weather is squally and demands many adjustments it is tiring. Yrvind Ten will have an inside and an outside steering position. As it takes some time to find the right setting it is a good thing if the two steering adjustments don’t affect each other.

One such system is to have self  tailing bottom acted winches under the aft deck, the axis being sealed by stuffing boxes to prevent water from entering the sleeping room. As I have two rudders and no line can take compression I need four winches. (The winches are under construction). This will handle the inside steering. Luckily a line has two ends. From the winch the line leeds to the tiller handle where you get a lot of leverage. From there it continues to a point close to above the rudder axis where the leverage is minimum. When the line is tensioned the force is equal all along the the line but the moment depends on the leverage so if pulling on the rope near the rudder axis the tiller will move. The pictures below will hopefully help to illuminate the idea.

Above. The mock up. One of the rudder heads in the foreground. The four winches are in the background.

The lines for starboard and port swing comes out of a fairleed and goes to a small bollard. The bollard will reduce the force  - which can be great when surfing down a breaker –  by 90% and direct the line to a cam cleat.

Steering with lines from the swimming platform or from the main hatch or from the mast topp. The fairleed is close to the rudder axis. The lever is small and the rudder handle is swinging.

Above, the four winches. My bunk is just below.

To be continued…

Regards Yrvind.




January 12, 2014

Uppdate 2014

Good New Year.

Miki from Wienna is here again to help with computer modelling and wideo.

I have had an eye operation. I was nearly blind on the left eye. For a man that has ten thousand books that was bad news.

It was the macula. A nice doctor drained the eye did her work and filled the eye with air. After a while water started to leak in. I saw the world like through a diving mask half filled with water. later only a bubble was left. Then the bubble was gone. Then I could look up. I had been laying on my stomach for two weeks.

However I had been thinking on my boat. I had decided that I needed a new rudder system.

Below the old one.

Here is the new system.

It gives me more place on the swimming platform. I can also stand there when sculling. The rudders foreward en will be under the platform preventing them from ventilating when the boat is travelling fast, that is surfing down a breaker.

There will also be a lot of fine weather. For those days there will be a side hatch close to the water on each side. See above.

Above chart table and book support.

Above chart table from side. It can be angled will slide and by changing the fulcrum can move up and down. Also when on other tack it can be angled from the other side. I will spend a lot of time reading my 100 kilo books during the planned 600 days voyage.

To be continued…

Regards Yrvind




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