The centerboard surfer required buoyancy, it is forbidden to operate it at a distance: using lines, tips, etc. to Insert it you need ferchu, and to be below the measurement line of the bottom it may be more than 700 mm. it is also Prohibited to have three or more of the fins; if they are two, they are located at the same distance from the transom, but no further than 700 mm from it. Fin must not protrude above the deck or go more than 300 mm in depth.
On the mast there are fewer constraints imposed, the Builder here more freedom in the choice and design geek, the way of attaching it to the mast and the sail at all arbitrary. However, the height of the mast from the surface of the boards should not exceed 4700 mm. it is also Necessary that in any cross-section it was round, with a constant along this section, with the thickness of the walls: bending it should be the same in any longitudinal plane. Permanently curved masts are prohibited, but allowed for some narrowing them to the extremities. Top and NOK are closed by plugs to prevent ingress of water inside afloat.
Main dimensions of the sail (A, E, M — measurement point; on the leaders pokazany ways of finding their coordinates).
The emblem of the free class.
Hinge shall operate under the influence of a sharp leap upwards, freeing the mast, and allow it to tilt freely in any direction at an angle of 90° from the vertical. At the same time, its design, and ferrules for wire luff point, is arbitrary. Adjustment of the bend of the mast can be carried out only with the help of the backstay sheet and angle of boom, and line for lifting masts; all sensible things that are essential for control rigging, stoppers, blocks, etc. — should be attached to the mast or boom.
The sail is sewn from non-woven material, Mylar, or anything similar are not permitted, but the window — one or more — made from any, only their size is limited to 0.4—0.8 m2; they are located no closer than 150 mm from any edge of foot. The flag is triangular, is placed on the mast sleeve width 150 mm and length of 440 mm in an arc from the head points to the tack corner. Ladermann no more than three; only put on the back foot. Their length 375, 525 and 275 mm, counting from top to bottom, width 40 mm, they should be placed no further than 100 mm from the measuring points. Gain — boty increasing rigidity of the sail is permitted only within 400 mm from the corner. Patch palovich and Skitovich boards is not permitted. Grommets are placed one by one in the corners. But for slab, you can sew another one on the back foot.
Amateur builders also need to remember that each Board is on the left outer side of the transom should bear the registration number assigned national sailing Federation. There are issued and numbers on sails improvised. They are nailed over the window, below the emblem of the class. Their sizes: height 250 mm, width — 165, the thickness of the lines 35, the distance between the marks is 60 mm.
V. TALANOV, master of sailing