Yrvind

[Manie B]

I was in calm water and safe. I was glad to bee alife. I was eager to start building my next boat. I decided to end the trip now and here and try get the boat shipped back to Sweden. At sea I had spent much of my time working on a new design and had many a wonderfull ideas of improvement. Learning by failure and learning by hindsigt.

oh well so it goes

[Manie B]

The news about the boat is not as good, but more about that later.

the point I am making here

(and please believe me I am trying to learn as much as possible from everybody, my own life will be on the line soon)

nobody but nobody can succeed after one day sea test

Sven's years and years of experience carried him thru, if it was anybody else they would not make it.

he is obviously good at catching rain water

[Manie B]

Thank you

Angel and Yes

and to all the fellow BD.net supporters on this thread

it was very nice to have your interest and support on this very interesting journey

we all learn a little every day along the way

I am almost finished the outside
cant wait to get back inside the boat

[Angélique]

Thank you Manie for starting the thread and for your input

I think this thread can carry on to discuss the news about Sven as it comes in . . . .

And good luck with the build and the and the subsequent journey . .

Cheers,
Angel

[Angélique]

Through intheboatshed.net ---> Longboats and life on Tristan da Cunha, I found this wonderful selection of photos taken by Swedish explorer and painter Roland Svensson during his visits to Tristan in the 1960's, 70's and 80's. Pics of Sven and Bris-I are there too, it gives live to the story about Sven's visit to Tristan. Enjoy . .

Cheers,
Angel

[Yes]

Originally Posted by Angélique

Thank you Manie for starting the thread and for your input

I think this thread can carry on to discuss the news about Sven as it comes in . . . .

And good luck with the build and the and the subsequent journey . .

Cheers,
Angel

What she said

Cheers,
Yes

[Angélique]

Sven keeps us updated....

New courage ---> New plan ---> Martinique . . . . . . and some info about the problems with the boat . . . .

See.. Present project uppermost for now, or archives September 11, 2011.

Cheers,
Angel

[Angélique]

September 11, 2011

... I got the mast to far forward. That means leehelm. ...

Sven seems to have discovered that between june 1 and july 2, 2011 and tried to solve it with a mizzen . . . ?

(but I'm not sure if the mizzen was planned or not)

June 1, 2011 no mizzen


click to enlarge (the big thing with the flag is the rudder in upward positon)


July 2, 2011 with mizzen


click to enlarge


See about the skipped bowboard....

- October 7, 2008 - RUDDER & BOWBOARD - (bottom post)

- June 14, 2009 - ON THE IMPORTANCE OF BOWBOARDS

- December 1, 2009 - THREE STEPS BACK AND A NEW THEORY FORWARD - (bottom post)


What are Sven's options now to improve the leehelm, what's your advice . . . ? ?

Cheers,
Angel

[Tad]

Originally Posted by Angélique

what's your advice . . . ? ?

Changing the trim or raking the rudder forward might help a bit, but I believe the best solution (at this point) is a dagger board. Outside the hull, in clips on the topsides, four clips and one board, probably just aft of the main mast.......or perhaps grind away the chine runners aft? Experimenting (something Yrvind loves) is the answer.........

[Manie B]

the best solution (at this point) is a dagger board

absolutely

and Angel you are right, he has experimented with it all already, time to go "conventional"

[Manie B]

The real (sad) truth is that nobody can do sea trials in one day and set a boat up properly for a long distance voyaging.

Any experimental boat like this needs a LOT of time to get going properly.

I am no hero and I have serious technical backup
http://5psi.net/ and http://www.epsilon-eng.com/

but this boat of Sven needed more input from a NA or the engineering type
AND it would not have detracted from his own individuality or "personal" touch. It is obvious that the CE - LCR - LCB calculations are not their strong abiliities.

But "sigh" the smallest this and the smallest that is what attracts us to these colourfull people with their unbelievable thirst for adventure. I absolutely love it, but I am a sissy that is fanatical about safety at sea.

[Manie B]

I love BD.net

if you want to learn its all here

Understanding the relationship between CLP and CE in sailboat design.

and another good one

http://www.duckworksmagazine.com/05/...bj/3/index.cfm

enjoy

[Angélique]

Originally Posted by Tad

Changing the trim or raking the rudder forward might help a bit,

Maybe within the current construction it's possible to swing the rudder a bit more forward then perpendicular..

but I believe the best solution (at this point) is a dagger board. Outside the hull, in clips on the topsides, four clips and one board, probably just aft of the main mast....

Well, I assume he still has the now obsolete bowboard, but not sure it's long enough to fit outside... maybe better make a longer one..

December 20, 2008 - - - - - - - - - - - - - - - - - - - - - - - - December 1, 2009 - (bottom post)

-
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - (click pics to enlarge)

...or perhaps grind away the chine runners aft?

and/or extend them forward . . ? ?

Experimenting (something Yrvind loves) is the answer.........

I think you're right , and thanks for the reply

Cheers,
Angel

[Manie B]

Angel I love your posts

because it is making this thing look like a hit and miss affair too much

[GTO]

Originally Posted by Manie B

... it is making this thing look like a hit and miss affair too much

It does look that way. There seems to be only two ways the chine runners can work: thru a high drag vortex or creating a wing-like effect with the bottom of the boat as Matt Layden suggests. So I guess it's possible Yrvind simply got the bottom/runner design wrong. However, the whole concept flies in the face of the conventional wisdom that shallow keels will lose some if not most of their effectiveness once the water gets rough (see A Voyage for Madmen, Peter Nichols, for one description). So at the worst possible time, the chine runners lose effectiveness and the rudder becomes the primary keel.

It will be interesting to see if the design can be make to work comparably to a conventional keel, or at least well enough for the shallow draft benefit to out-weigh the windward disadvantage.