xavier wrote:
Main sails on Hobie's boomless boats have full battens, so that even without a boom, the sail keeps its shape, whether sheeted in or sheeted out.
X-man - don't the "boomless" sails also have a batten running along the foot -in effect a "lightweight boom"? I can't remember although I have sailed a boomless 17.
Sailing 17's with and without a boom, side by side, I prefer the boom for getting the optimum sail shape for better performance upwind and abeam. However, the boomless seemed a hair quicker off the wind. The Dog says it spills more wind but I think the sail gets better "fill", like a spinnaker.
Winging it is fun, and a great move if you are relaxing and simply need to get your apparent wind down to '0' so that you can warm up or pour a drink, or light a small cigarette, or all three

. But in a race or a hurry, the broad reach is still your fastest point of sail, especially if you can get a hull up, and will get you downhill a lot faster than a run.
Happy sails
