David,

I have a 2-D CAD program, called QCAD. Such programs let one draw different bits in different layers.  I imported your sailplan under a layer I called 'imported JPEG'.

This ends up in a wrong scale. Then I added two more layers, one called Waterline and one called helping lines. The waterline you can see in blue; I just drew it up on freehand. With two vertical helping lines from the bow and stern, down to the waterline, I suddenly had the length of the boat, as it came out. The whole drawing, all three layers, was then expanded to make the boat  24', or 7.315m in my numbers. 

The hull, mast and mizzen mast and sail were then traced into 3 different layers.

Then I was ready for importing one of my master sailplans (also in QCAD), chopping off the lowest panel and scale it down until B= 4.10m. This was trial fitted on the boat, and I think it looks good. The moderate aft rake of the main mast (about 2deg.) appears to suit the sail just fine, and gives a good angle and sufficient drift between the mast top and the halyard's slingpoint at the yard (5% aft of the middle).

There are some more stuff to be found about this here.

Arne

Hi David,

Here I have done a bit copying and. pasting. From a stack of master sails that I have, I took the lowest sail and removed the lowest panel, before crimping it to a suitable batten length. This sail makes better use of the mast you have drawn up.

This lets you either skip the mizzen for now, or make it smaller, and move the mizzen mast further aft. I suggest you start without the mizzen, to save time.

The sail I have drawn could be made flat, as you planned. However, there is a simple way of making a bit camber in the sail, just by fitting small tucks at the luff and leech. The red sail below was modified to have camber this way. If you are interested, I can redraw the flat sail, to the necessary oversize. When you make it and then add those tucks, it will crimp back to the shown size.

The extra work of fitting those tucks will be less than five hours, and it will pay back in better performance.

Good luck,
Arne

David,

It would be very useful if you could present some profile drawing with the mast, board and rudder in place. Remember to fit some scale along the drawing, for instance showing  10ft or 5 metre on it.

That would help any wannabe rig designer to come up with something.

Cheers,
Arne

everything you need for rigging and parrels etc. should be covered in the Practical Junk Rig, the tutorials are just for laying out the sail.

It took me longer to attach all the bits and bobs to the sail that it did to make it.

Bill

Bill,

Thanks for getting back to me.  That article certainly has what one needs to draw the Reddish sail itself. Do you know of any article that talks about suggested mast line, parrels, and running rigging?  

David