Thread: Goat Island Skiff building in Denmark :-) Sejl-jolle bygges i Danmark

Hi Bjarne,

It is late here and I have only seen your message now.

I will have a look tomorrow and put some information together if someone else has not written a reply first!

Best wishes
Michael

Sounds good, ill be look forward to it

Did you recive my response to your email ?


Bjarne

Howdy Bjarne,

Sorry about the delay, I am up against some serious deadlines.

If you have marked out the side and bottom of the boat it is the same method. So if you have not marked those out yet then I would suggest doing it first.

The frames and transom all are measured from the centreline shown in each drawing. So you need to draw the centreline first. Put them in the positions shown in the drawing that shows the positions of the parts.

The dimensions are meausements up from the base of each frame and across perpendicular to the centreline.

You can use the edge of the ply sheet as one of the long edges of all the bulkheads except the transom

The only real difference is the transom because you need to mark it out do the dimensions BUT it has to be cut a slightly larger size than that. This means that you should draw it slightly away from the edge of the plywood so there will be enough space to cut it outside the lines. The drawing gives the right information.

Hope this helps
Michale

Also this page on the PDRacer site may help. I would mark out the sides and bottom of the boat first.

Please ask any questions here. I will not be available (my time) from about 7pm tonight (ie saturday) until about 6pm tomorrow night.

http://www.pdracer.info/PDRbuilding/markingout.html

MIK

Thx for the explanation and the link, Mik

I have another question, its about the mast.

I dont know which too choose, the solid or the hollow mast.
It's most important for me is to get a stabil boat. I will 90% of the time use it for cruising. It will primary be me and my 2 kids (4½ and 8½ year old). So i would prefer comfort and safety over speed at any time!!

"Can anyone tell me if it makes any difference if you have the batton in place or not while reefing?"

What is the batton and what do reefing means ??

I have tryed to find something about it on Google but i did really find a explanation - so if you can help me out


Bjarne

We built our GIS long before Mik designed the hollow rectangular mast version. So, we have a solid, fir, round mast. It's a lot of weight aloft for such a light hull. It becomes particularly noticeable when climbing in & out at the dock, or when beached and climbing in over the bow of the boat, or when rigging at the dock. Also, it takes some careful lifting to keep all that weight vertical while hoisting it up (while the boat's on the trailer) to be stepped. None of it is terrible, but a hollow stick would definitely be an improvement.

Also -- I just recently finished a PuddleDuck Racer. I did the hull before Mik designed his version (the OZ PDR), but did most of the rest of the boat to his specs... including the hollow rectangular mast. I have to say - even though I've built hollow (birdsmouth, coopered, and rectangular) spars before, I continue to be surprised & impressed how much lighter they are. Plus, the lumber for the hollow mast was considerably less money than the beefier stick that would be required for a solid mast.

If I were to build another GIS for myself, I'd choose the hollow mast - without hesitation. In fact, even though it'll require a new mast and a revision to the mast step & partner, I do plan to change to a hollow mast at some point. Or, perhaps I'll keep the step & partner as is, and build a new, hollow, birdsmouth mast. I'll have to think about it.

I see the benefit of a hollow mast vs the solid mast.
But what about the safety and stability when sailing ?
As i mentioned before, ill be sailing most of my time with my kids so i really dont care much about speed/racing - for me its safety above all, which in this case is no capsize!


Bjarne

Originally Posted by Maximuss

I see the benefit of a hollow mast vs the solid mast.
But what about the safety and stability when sailing ?
As i mentioned before, ill be sailing most of my time with my kids so i really dont care much about speed/racing - for me its safety above all, which in this case is no capsize!
Bjarne

DanskeBoyka,

Pardon me if I've mangled the language. I'm just trying to remember a bit of the Finnish I spoke as a young child.

Back to boats -- the hollow spar will add to stability. I'm guessing it might be slightly less stong or robust if it came to standing up to a hard, hard wind. I'm just guessing, but Mik can answer more precisely. I'd further guess that - if it's blowing that hard, you shouldn't be out on the water at all, and you'd have other problems to worry about long before.

I once had ours out on a lake, reefed down to a very small sail area, with winds in the 25 - 35 mph range. No ballast except my tightly clenched posterior. With the solid mast, I had no sense of it being overly stressed (though, sometimes with a mast you don't know till it breaks). I think I'd have noticed. I've been working with wood, in various applications, for over 35 years. My adrenaline level was high. I was checking every part of the boat in rapidfire fashion. The largest part of my attention, however, was focused on the water to windward, so I could anticipate what the wind had in store for me. My main goal throughout was to keep the boat upright, and not allow her to get knocked down by a strong, sudden gust - especially while heeled the wrong way on a wave. Those were extreme conditions for that boat with inexperienced me at the helm. In fact, none of the other comparable sized (or bigger) boats were out with the exception of a 30+ foot fiberglass boat scooting around under jib only - having a grand old time.


"There are some things you learn best in calm. Some in storm" -- Willa Cather

hmm, thats app. 6/7 on the Beaufort Scale - you are right about that one, im not going out in that wind with my kids.

What is the recommend Beaufort or the m/s (meter / second) ??

Sounds like it's going to be the hollow mast

Perhaps somebody can explain this for me:

"Can anyone tell me if it makes any difference if you have the batton in place or not while reefing?"

What is the batton and what do reefing means ??


Bjarne

reefing - reducing the size of a sail so it copes better with a strong wind
batten - a solid (often wood) piece inserted into a sail to help it maintain its designed shape

Originally Posted by jmk89

reefing - reducing the size of a sail so it copes better with a strong wind
batten - a solid (often wood) piece inserted into a sail to help it maintain its designed shape

Great! Thx

How do you make your sail shorter ??

Bjarne

Shorter - Just means making the sail smaller

I have been trying to see if i can find a picture of a reefed GIS, but there dont seems to be any - do some of you have one so i can take a look ?
The guy that's gonna give me some sailor-lessons asked if it could be reefed - i sayed yes to that and when he asked me how and i if i have a picture - well, how and do i have a picture of it

Bjarne

Howdy Bjarne,

If you tell your friend it is conventional "slab reefing" like on most racing yachts then they will hopefully understand.

If they need to understand how the normal rigging of the GIS works they should look at this page.
http://www.storerboatplans.com/GIS/GISRigging.html

It is very important that the sail is in the same position in the plan.

The reefing style is the same as most racing yachts "slab reefing".

The same system is used on my BETH sailing canoe.

Here is BETH with her full mainsail

here is my whole set of beth sailing canoe photos on flickr

Here is a distant picture of my sailing canoe Beth with a reefed mainsail.


Here is BETH just before or just after the same sail.



Basically you slacken the rope that pulls the sail up. Then pull the sail down and tie it off to the boom (the timber along the bottom edge of the sail). The lashing (tie) only needs to be at the back and front of the boom only.

Hope this helps your friend

Best wishes
Michael