Andrew wrote:
Arne, thanks again. As you can see in the cabin photo, the doorway is offset to port slightly, as is the toilet pan. I don't think it's as much as 10cm but it certainly gives an advantage. It's quite a large area for the heads so I'm not too worried about making it a bit more cramped. I'm thinking I might even change the heads to a composting loo so potentially could move it even more.
Do you think it's possible, within reason, to decide the perfect position for the mast then adjust the sailplan accordingly? There's a nice space between the existing mast and the edge of the hatch that's just itching for a jigsaw! If necessary I can widen the companion way.
Can I ask where you got the drawings that you based your designs on? I have some but yours have a good amount of detail. I'm attempting a 3D drawing in Fusion 360.
Andrew,
about that mast position you want, do you mean through the foredeck right aft of the hatch (and a bit offset to sb.)?
That could be difficult, but I will have a closer look at it. The challenge is to achieve good helm balance (the position of the sail's CE must sit so and so far ahead of the CLR), and that without having to make the sail with too big mast balance (i.e. amount of sail forward of the mast). The question of good or bad tack has been debated before ( http://goo.gl/khii3l ) .
As for the mast step; just remember that for an un-stayed junk mast, the forces in the mast step will mainly be horizontal, while the compression load is much lower than in a Bermudan rig.
The drawings were picked from those that Graeme came up with to begin within this thread. They were of reasonably high resolution, so I could just imported them into my QCAD program, aligned them, upscaled them, and finally traced them.
Cheers,
Arne