Many thanks David, for the progress report and also for the revised mast angle. I can level the boat using the jockey wheel adjustment then get that right. Mast tube now arrived and Richard and I are getting some hardwood for the tabernacle. I now need to look more closely at the sheeting perhaps.
I now have all the individual panels made up, with their tablings folded and sewn, and today I've been preparing the batten and yard pockets. As soon as my own sail is out of the way and back aboard, I can begin to assemble the panels and pockets in my living room "sail loft".
I've made a more accurate assessment of the CE of the original bermudan rig and the weaverbird-pattern sail, and I think that you only need a forward rake of 2 degrees, with the heel of the tabernacle in the same place as the heel of the old compression post. The image I have of the bermudan rig shows an aft rake of 6 degrees, so don't let that confuse you. Try to get an accurate horizontal or vertical surface - perhaps the cabin sole or main bulkhead, and measure 88 or 2 degrees to establish the mast line.
Many thanks David for showing me how it is going. This is very interesting - and exciting to see the first panel taking shape. It also helps me to appreciate how much work there is going to be done in the whole sail! Mast tube should arrive tomorrow or Wednesday so we will be able to start on that at last.
Looking again at your drawing I make it a 5 degree lean forward on the mast so I will work on that for the tabernacle angle below the cabin top unless I hear from you otherwise. I had a discussion with Richard Oates recently which led us to wonder if bamboo would be a cheaper and acceptable alternative to the fibre tubes that I bought? Any thoughts on this welcome.
Sounds good, David.
Here's an album containing a few photos of the sailmaking process at the stage reached so far.
My friend Richard Oates and I are both now going ahead with very similar projects and I have now ordered the aluminium tubes for us both: 5m of 4inch 10SWG tube. When it comes I will look at making the top mast out of a section of old spruce, but if that doesn't work Richard is going to help me make a hollow top mast from scratch because his will be much the same!
I'm in the middle of making the Nimrod sail. I've uploaded the drawings of the panels to Members' Area>Your files>Drawings>Westerly Nimrod. They show how it's possible to cut the cloth for a sail within a very small space, if CAD is used to draw and dimension each individual piece of cloth.
I'm using standard width sailcloth, at 92cm. This is cream-coloured Hayward's Sunwing 5.4 oz/sq yd, the very last of the stock of ends of rolls that "Englishseadog" on eBay were holding. It's a pleasure to use. (I also bought what they had of tan coloured Sunwing at the same weight, for some future sailmaking project).
Some points to note:
Jami, I found a website with a conversion calculator from SWG to mm and mm2 on it.
Just remember, there is something called AWG, American Wire Gage as well, which is different from the British(?) SWG. The only time I have met these units in my working life has been when dealing with thin solder tin wires (working with electronics).
I still struggle with finding any rational reason for these units - and yes, now I checked my solder tin dispenser, made in Holland. No SWG or AWG on it, just 1mm...
Ok, thanks. In my conversion I'm having difficulties in trying to decide between 3 and 4 mm tube. This 10swg is in between...
It's also interesting to notice that the stock tube lenghts are totally different here: no matter what the diameter, the length sold seems to be 6 meters.
swg = standard wire gauge, commonly used in the UK for wire diameters and metal sheet and tube thicknesses.
There are other wire gauges as well, particularly in the USA.
10swg = 0.128in, or 3.25mm
16swg = 0.064in, or 1.63mm
I'm following this wirh interest, but in order to do so, I'd need a hint on one detail: as someone living with metric system, I have no idea what kind of a unit is swg.
How thick is a 4in x 10swg tube in millimeters, please? Three or four?
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