Paul, the spreadsheet shows that the friction has been overcome.

There is enough surplus power left to reduce the camber.  

OK, did go through all calculations.

Changed and redefined a few cells and the result convinced  me that it is indeed doable.

Any arguments against, with calculated explanation is welcome.

I did make a spreadsheet with a calculation of the pull force on the outhaul arrangement. I only need a sane approximately value for resistance.

Any ideas?

Edit

I found some factor on the internet and implemented it in the spreadsheet.

It shows that my original idea does nor work, but starting from the top and attaching it to the sheet in the bottom would probably go?

That seems to be wrong thinking.

Hi Nic, yours is an interesting idea. I did think of ways to flatten or deepen the camber but in the end designed the sail for an ‘average’ wind. 

I think you will find your idea will suffer from friction with all the blocks but if you want to try it then please go ahead. 

Paul

Hi Eric,

I edited my post and attached a, Hmmm. Sketch.

Hope it is clear.