I’ve been searching the forum and came with this:
http://www.rcsailing.net/forum1/showthread.php?t=772&page=2&highlight=mainsail+attachment
the pics aren’t showing up anymore…
I also read Lester’s page and remember a post from Greg V.
http://www.onemetre.net/Build/Jackline/Jackline.htm
http://www.onemetre.net/Design/MainGap/Maingap.htm
What are your thoughts? Keep it simple?
I think the shape of the mast makes more of a difference thanthe way you attach the sail to the aft edge if it. A round mast has worse flow around it than an airfoil-shaped one.
forgot to add that it is for an IOM!
The luff slot idea is interesting , Lester mentions wind tunnel data showing some improvement , seems to be acting like a leading edge Flap. I’m going to try it on my next suit of sails.
An air foil shaped mast works best if it can rotate into the air flow , round mast will be consistent through all angles of attack.
and if it is class legal! Be sure and check before you decide.
not much info so I did it “my” way…or like many others do!
Made a gap of 4mm.