Posted by: ken smith on March 29, 2005 at 16:42:48:
In Reply to: hull shape posted by wayne matheson on March 29, 2005 at 10:39:42:
Wayne:
You'd better get a copy of a yearbook with constitution and specs and read them. There are lots of plces to go wrong and then you'd have built a DN-like iceboat that could not compete in a race, at the expenseo of resale value. It is easy enough to comply, and the class is highly evolved so the boat is a great boat.
Thte rules say mast step must be mounted ON the fuselage, so I think you are SOL But what's the difference? No force is trying to lift the mast up out of teh ball. Tuning regularly requires the mast to be dropped, and many simple adjusting devices for mast step location are out there and relatively available (the Sarns 4-screw setup is the worst to adjust).
Only the top corners of the hull can be rounded, the way I read it.
Excerpts, first from the Constitution, then the Official Specifications:
ARTICLE X-OFFICIAL SPECIFICATIONS
Requirements for the yacht, sail, and attached equipment shall be set forth in the OFFICIAL SPECIFICATIONS OF THE DN ICE YACHT. In all cases where there is a conflict between the Official Specifications and the Official Plans, the Official Specifications shall prevail. Specifications, however complete, cannot anticipate every possible situation that may arise. If a point is not covered, a ruling must be obtained from the Governing Committee through the Technical Committee. The intended meaning and the basic principles of maintaining the DN as a one-design class shall be considered in interpreting any point not covered. If a point is not clearly covered by the Plans and/or Specifications, it must be assumed to be illegal. The OFFICIAL SPECIFICATIONS shall be enforced in two ways. First, any contestant or judge or Race Committee member at the North American and Gold Cup Regattas may file a protest against any competing yacht. Second, the Race Committee shall measure the first five place-winning yachts at the conclusion of each regatta.
A. Fuselage
16. Hull cross sections must be rectangular from a point 6"(153. mm) from the bow to a point 6" (153. mm) from the stern. A maximum 1/4" (6.3 mm) radius is allowed on the outside top corner of the fuselage where the deck and side panel intersect. Concavities in the deck are not permitted.
H. Rigging
7. Means for rigid adjustment of mast step location are permissible.
8. Means for adjustment of mast step location while yacht is underway are prohibited.
9. Mast step shall be rigidly mounted on the deck of the fuselage.
10. Mast step shall permit free orientation of mast.