A drawing exercise with hi-balance sail

Frederik uses to publish photos from his building progress of Hogfish on FB, both on his own account and on the FB group.

Recently he published an old sailplan from me, not the one he is actually going to use  -  a Paul Thompson design. Then I was dumb enough to stick out my head and air my view on plumb masts contra raked ones. I shouldn’t have done that, least of all on FB, where most of the contributors are mainly armchair enthusiasts.

Still, Paul was generous and mailed me his sailplan in .dxf format to let me draw my preferred version onto it. I have now returned it to him with my extra details added.

This sail differs quite a bit from the first one I sent to Frederik some years ago. Thanks to Paul Schnabel’s experience with a Johanna 60 type sail on his  Maxi 77, which he pushed further and further forward, I could now conclude that 27% mast balance works well.

I therefore picked another Johanna 60 master sail from my stack, scaled it up and fitted it to a plumb mast on Hogfish, a little aft of the original one (stub still visible). The lovely thing with this is to see how close the CE now sits to the mast. This will ensure easier steering downwind than with my former low-balance sails.

Now, this is just an exercise and a demo of the hi-balance sail. I admit that I am not so fond of forward-raking masts, but when Paul T. says that they have worked well on his boats, I have to surrender  -  although a bit reluctantly...

I can only wish you both good luck!

Arne

(..full size diagram under Arne's sketches, Section 8...)

Hello Frederik,

Your boat looks great! No offense to any of the other skillfully built junk boats out there, but there is something I really like about Chris Morejohn's designs. They are, to my eye, an excellent modern Sharpie.

Can you explain the purpose of the 90-degree-angle structure connecting the anchor well to the bow?

edit: It think I understand. This is where you will mount the windlass.

Scott.

That looks great, very nice!

Yes. Heavy enough.. should be ok with, say 6-6.5 ton displacement empty boat. 
I did some corresponding with Eric Sponberg and he informed me that those older freedom masts were overbuild. 
The section I’ll be using has a wall thickness of 12+ mm at the step.  That is without gel coat. 
at the mast head it’s 10,5 mm. Inner and outer layers are fiberglass. 

Hope to see both you guys later this year. Happy sailing!

Looking great Frederik!

Still, it's amazing how heavy a carbon fibre mast is!