Join Date: Feb 2000
Location: Annapolis, Md
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Re: Dickerson Farr 37. I have questions
Its a complex question to explain in a short reply, but here goes. In order to take advantage of an asymmetrical chute you need a boat with a hull form that will make very large gains by heating up and sailing comparatively hot angles. That normally implies a boat with a semi-displacement hull form (by way of comparison think Mumm 36 or Farr 40) (or even more so think of a planning hull), and with a lot of stability relative to drag. Neither characteristic is true for the Farr 37. Boats that best use asymmetrical spinnakers typically see 40%-50% increases in speed by heating up maybe 15-20 degrees in moderate winds (with bigger gains in speeds and VMG at hotter angles in really light winds). While the Farr 37 was one of the better reaching IOR era boats of its size (in terms of its hull form, weight and sail plan), compared to the IMS influenced designs, it really does not offer the same breakthrough speeds gained by sailing hotter angle.
And while any boat will pick up a little VMG by heating up in light winds, the huge masthead symmetrical chute and marginally lower wetted-surface on the Farr 37 means that for any wind speed the maximum VMG will be sailing at a much deeper angle than is ideal for a typical AP asymmetrical spinnaker. Because the Farr 37 does not have the high stability of more modern designs, the asymmetrical chute would need to be cut very flat so the sail can be carried up onto a reach, and that flatness would prevent the sail from working well at the deep angles that the boat should be sailed at to make the best VMG. So in order to make this flatter cut asymmetric work, the boat will be sailing at a hotter angle but because of the hull form, the boat will not have a sufficient increase in speed to offset the added distance sailed.
I am not sure how clear that really is, but at the heart of it, the deep canoe body, narrow waterline beam, and pinched stern, will limit the hull from being a really good reaching boat relative to the later designs which have hull forms that are better optimized for reaching speeds. Assyms only offer an advantage when reaching but only if the boat has the stability to carry an asymmetrical as the winds increase in speed.
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Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay
Last edited by Jeff_H; 4 Weeks Ago at 06:55 PM.