Thread: The Northstar GIS Build

I can just offer one tip if using the International Perfection 2 pack. Because it dries very slowly, it's best applied in a dust free environment. I found that it wasn't necessary to use the roll and tip method like for other products like the 1 pot Toplac which is touch dry in a couple of hours. Just use a roller and the bubbles eventually disappear as the surface flattens out perfectly. If you get any runs or imperfections, don't be tempted to rub these out before the next coat, just paint straight over them. The finish will build and you can make the finish perfect by wet sanding and going through the grades after the 3rd coat. I finished with 2000 grade using an orbital sander and the finish was nothing short of stunning. It is super tough too so should last for many years, but of course this depends on how many rocks you encounter along the way!

My brother also followed this process for his Paper Tiger cat. He saved heaps of time and reported that the finish looks like it was a spray booth job.


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I love this place. You build a little boat which is fun and fun to use and make friends all over the world at the same time. How can it get better than that?

Originally Posted by Northstar

. . . How can it get better than that?

If they sent you money for no apparent reason, regularly, maybe offered a phone number to their finacially independate, former model, unmarried sister, who thinks boatbuilders are the end all of craftsman. Just saying . . .

I think I may have made a serious error and I don't know how. I have looked at pics of other builds and have become concerned that my centerboard case is too close to the #2 bulkhead. It is 390 mm from the back of bulkhead #2 to the front of the centerboard case. In pictures it looks like it should be more like 500 mm. Which is correct, how will it effect the performance of the boat if I leave it and how difficult is it going to be to correct if I decide to. The seat is not glued down but the centerboard case is. I have enough materials to build a new #3 bulkhead and for that matter a new centerboard case. Should I to that and move it back? How do I get the old bulkhead and centerboard case out of there?


I measured all of this three times during construction and can't understand how I wound up in the wrong place. All help is greatly appreciated.

Yours in the pictures looks right to me. But don't go by pictures, check the plans. Mine have been long misplaced or buried and the boat is under winter cover so I can't measure.

If yours really is too close to #2 it is probably due to bulkhead 3 being too far forward--a very unlikely error IMO. BH 2 should be a few inches behind the butt splice.

Originally Posted by Northstar

It is 390 mm from the back of bulkhead #2 to the front of the centerboard case. In pictures it looks like it should be more like 500 mm. Which is correct, how will it effect the performance of the boat if I leave it and how difficult is it going to be to correct if I decide to.

Don't do anything drastic, I think you're good. My boat is absolutely buried under snow right now, and I would check, but I don't have a lot of room myself up in there. 15" sounds about right. Relax. Someone will come along with a measurement soon, I'm sure.

My centrecase is 534mm measured from the aft ply face of BH # 2 to the fwd face of the centrecase front gusset. Maybe yours is correct and mine is wrong. Someone else will chime in soon.

Calculating from the drawings, the distance between bulkhead 2 and the forward most part of the centreboard case should be 541mm. Accounting for the thickness of one bulkhead and roddyhd1's 534mm seems correct. Your 390mm seems very strange. Difficult to imagine where those 150 mm disappeared. I think you'd better do some measuring...

Pontus

I no longer have my GIS so can't check. It sounds to me like a bulkhead is in the wrong place.

I originally became concerned I might be off by observing the distance between the forward edge of the seat and back edge of the butt strap. The 541 measurement seems right to me. I was just wondering how much 150 mm will make in the performance of the boat. It is going to take some pretty drastic work to tear all of that out and redo it. Any comments on that?

Thanks for taking a look this.

Much snow disappeared last two days. Spring just might be on the way and we can sail.

I checked the distance on my boat and it measures 540mm give or take a couple for the headlamp and laying on the floor.

If the distance is too short since bulkhead two is too far backwards, your boat will be a bit pointier at the front. Won't matter that much. If on the other hand bulkhead three is too far forward, your centreboard will be too much forward, and that I suppose will cause excessive weather helm. Might not be more than can be trimmed out by attaching the sail a bit more forward, and perhaps making the centreboard lean a bit more backwards?

G'day
I accidentally put Bhd 3 in the wrong location, 30 cm fwd of where it is supposed to be . I hope you haven't made a similar mistake; however it's not unrecoverable, you'll just need to cut out the centrecase patch the bottom and go again. It took me about a week of 2 hour nights to fix it. Details are on my gis yawl thread.
Cheers Dan

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I am about 15 CM short of where I should be with #3. I am wondering just how much that will effect the helm. I have drilled a couple of guide holes in the bottom but have not cut the whole slot for the center board. I just don't know how to get the whole thing out of there. If the helm will not be effected that much, I'm not going to do it. However, I need to do something (or not) soon so I can get moving.