In very light conditions, a flat main won't generate any lift...and you won't move... also, not supporting the boom will close the leech of the sail, as Faster pointed out, which was my reasoning for supporting the boom with the topping lift...to allow the sail to have a fuller shape to help generate lift and to keep the leech open. Yes, flat sails help with attached flow, but you have to balance keeping the flow attached with sail shape to maximize lift. A flat sail generates almost no lift.
Originally Posted by Skipper995
I have to disagree with sailingdog on one issue however. In very very light conditions the main needs to be made as flat as possible to try and squeeze as much power out of the breeze as possible. In these conditions air flow has a very hard time staying attached to the sail. Detached air flow means loss of efficiency and power. A flat sail allows the breeze to maintain nearly complete flow attachment for best sailing performance.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Still—DON'T READ THAT POST AGAIN.