3.2.4
Construction Details - Wood:See Appendix A

3.2.5
Rule no. not used

3.2.6
Fittings

3.2.6.1
Fittings
The following fittings are permitted:
(a)
2 Mainsheet blocks (excluding those on the boom) shall be attached to the hull innerbottom. The centre of their fixing points shall be at 786 +/- 5 and 894 +/- 5 from the forward face of the aft transom.
(b)
One ratchet block for the mainsheet.
(c)
2 toe-straps and 5 associated fixing plates of 50 +/- 10mm x 20 +/- 5mm x 2 +/-1mm if metal or 50 +/- 10mm x 20 +/- 5mm x 9 +/- 1mm if plastic .(see also CR 3.2.6.2)
(d)
A compass and associated fixings, which shall all be removable for weighing the hull. Digital compasses and/or devices memorising, correlating or transmitting data relative to wind direction or speed, or boat speed or direction and location are not permitted.
(e)
Retaining clip(s) for a paddle.
(f)
An adjustable mast step. Movement of the mast at the mast step or at the passage of the mast through the mast thwart shall not be able to exceed 3mm in any horizontal direction. The mast or mast step shall not be adjusted while racing. Mast step devices which can be easily set while racing in such a way that this class rule is infringed, are prohibited.
(g)
Retaining clips for water bottles, food container or other personal equipment, which shall be removable for weighing the hull.
(h)
Retaining clip for fastening the tiller extension to the tiller.
(i)
Strips of non-metallic material may be fitted in the daggerboard slot within 30mm of the top and the bottom of the slot to achieve a uniform opening of 16mm +/- 2mm at the top and the bottom of the slot. Additional non-metallic material may be placed within 30mm of each end of the top and bottom of the slot to act as positioning and protection of the daggerboard. This additional material shall be removed upon request of the measurer, for the measurement of the slot. (see also CR 3.2.2.11)
(j)
A handle or ball may be used on the outer end of:
(i) Sprit halyard.
(ii) Boom downhaul.
(k)
1 hole (diameter max 8 mm.) on the centre line in the top of the forward gunwale just after the forward transom, for drainage and or for leading (not fixing) of the painter line, 1 hole (diameter max 8 mm.) on the centre line in the top of the aft gunwale just before the aft transom, for drainage and or for fixing of an optional shock-cord to tension the toe straps. (see also 4.3)1 hole (diameter max 8 mm.) on the centre line in the daggerboard case top side, aft of the daggerboard slot, for drainage.

3.2.6.2
Backing plates shall comply with the Plans and laid-in as shown on this diagram. (i.e. top surface of backing plate flush with top of bottom foam core) Toe straps can be attached to the midship frame,using at most 4 fixing plates (two for each strap) of maximum dimensions of 50 +/- 10mm x 20 +/- 5mm x 2 +/- 1mm for metal plates or 50 +/- 10mm x 20 +/- 5mm x 9 +/- 1mm for plastic plates.

3.2.6.3
The following items, and others not specifically permitted by these rules, are prohibited:
(a)
Mainsheet cleats, mainsheet horse, track or traveller.
(b)
Suction bailers and bilge pumps.
(c)
Decking or spray covers of any sort.
(d)
Any apparatus or contrivance outboard, or extending outboard, which is, or may be used to assist In supporting the helmsman outboard.

3.2.7 Buoyancy

3.2.7.1
The hull shall be fitted with three buoyancy units in the form of inflated air bags made of strong fibre-reinforced material. Each unit shall be 45 +/- 5 litres. Each unit shall be equipped with a fill valve that positively prevents the accidental release of air (i.e.- Non-return valves and threaded valves with screw-on caps). The minimum weight of each unit shall be 200 grams.

3.2.7.2
One unit shall be placed along the whole width of the aft transom and one unit shall be placed along each side between the midship frame and the mast thwart bulkhead.

3.2.7.3
Buoyancy units shall be securely fastened to the hull by three straps for each unit, each strap shall be 45 mm +/- 6 wide. 1 backing plate of metal 50 +/- 10mm x 20 +/- 5mm x 2 +1 /- 0mm and 1 fixing plate, 50 +/- 10mm x 20 +/- 5mm x 2 +1 /- 0mm if metal or 50 +/- 10mm x 20 +/- 5mm x 9 +/- 1mm if plastic, shall be used for fastening of each strap.

3.2.7.4
The owner is responsible at all times for the buoyancy and for ensuring that at intervals of not more than12 months the buoyancy is tested and the measurement certificate endorsed by a measurer or a responsible club officer. The measurement certificate shall not be valid until so endorsed.

3.2.7.5
The measurer shall witness a buoyancy test as follows: The boat shall be swamped with water and with iron weights of not less than 60kg placed aft of and within 100mm of the midship frame, it shall float with the gunwales clear of the water. The measurer shall make sure that the buoyancy and its fastening are sound, and that inflatable buoyancy shows no visible signs of deflation.

3.2.8 Weight

3.2.8.1
The weight of the hull in dry condition,
including: rudder gudgeons fixed to the aft transom, buoyancy straps , toe straps and associated fixings (without removable foam or protection), mast step, block fittings permanently attached,
but excluding: corrector weights, blocks, mainsheet, buoyancy air bags, painter, bailer, paddle, compass (with bracket if any) and fixings, retaining clips for water bottles, food containers or other personal equipment and fixings, and all other not specifically permitted items, shall not be less than 32kg.

3.2.8.2
If the weight of the hull in the same condition as prescribed in CR 3.2.8.1 but including buoyancy air bags is less than 35kg but not less than 32.6 kg wood corrector weights shall be fitted to bring the hull weight up to not less than 35kg. The corrector weights shall be permanently fitted, half to the forward transom and half to the aft transom. No corrector weights shall be removed or altered without the boat being re-weighed by an official measurer. The weight of each corrector shall be stamped or otherwise marked on the corrector and endorsed on the measurement certificate.
(See also CR 3.2.7.1 for minimum weight of buoyancy air bags.)

3.3 Daggerboard

3.3.1 Materials

3.3.1.1
The daggerboard shall be made of:
Wood
Ply or laminated
GRP
ResinOf any kind. Shall not be coloured.
Glass fibreOf any kind. Shall not be coloured.
Foam. Shall only be used as core materialNon-absorbent closed cell of any kind
Bonding agentOf any kind and colour
FillerOf any kind and colour
Gelcoat or paintOf any kind and colour

3.3.1.2
Non-metallic reinforcement (bushing) of diameter not more than 20mm may be used around screws, rivets or bolts.

3.3.3 Shape

3.3.2.1
The daggerboard shall be generally a rectangular flat plate in shape, except that the lower corners may be rounded to a radius of not more than 32mm, and the upper corners to a radius of not more than 5mm.

3.3.2.2
The thickness of the daggerboard (excluding bevels) shall be not less than 10mm nor more than 14mm. Bevelling is permitted between the edges and the bevelling limits, situated 60mm from all edges. The thickness of the daggerboard between the bevelling limits shall nowhere vary by more than 0.5mm.

3.3.2.3
The overall length of the daggerboard shall not be more than 1067mm and the width not more than 290mm nor less than 275mm. Within these limits, the width shall not vary by more than 3mm.

3.3.2.4
The daggerboard shall be fitted with stop battens, one each side of the top of the board. Permitted materials are the same as for the daggerboard. The battens shall extend over the full width of the board, and the depth shall not be less than 35mm throughout. The thickness of the assembled stop battens and daggerboard shall be not less than 40mm. The exposed edges of the battens may be rounded to a radius of not more than 5mm. The battens may be fixed with glue, and/or not more than two bolts of 10mm diameter, or not more than the equivalent weight in smaller bolts, pins, rivets or screws.The length of these fasteners shall not exceed the thickness of the assembled daggerboard and stop battens. Alternatively, the battens may also be constructed as an integral part of the daggerboard.

3.3.3
The weight of the daggerboard, without attachment or positioning features, shall be not less than 2.0kg. Ballasting or cut-outs of the daggerboard are prohibited. The centre of gravity of the assembled daggerboard and stop battens shall not be less than 520mm away from the lower edge.

3.3.4
The daggerboard shall float, and shall be attached to the boat. One hole may be drilled through the daggerboard and the battens in any place. Its diameter shall not exceed 10mm. An elastic cord or lanyard may be used to attach the daggerboard to the hull. A small shackle may be used to attach the cord or lanyard, either to the hull or to the daggerboard.

3.3.5
The daggerboard may be held in the daggerboard case by a loop of (elastic) cord. The cord may be fixed to the daggerboard case through two eyes or to the mast thwart bulkhead through two holes, with a diameter of not more than 10mm.

3.4 Rudder and Tiller

3.4.1 Materials

3.4.1.1
The rudder shall be made of:
Wood
Ply or laminated
GRP
ResinOf any kind. Shall not be coloured.
Glass fibreOf any kind. Shall not be coloured.
Foam. Shall only be used as core materialNon-absorbent closed cell of any kind
Bonding agentOf any kind and colour
FillerOf any kind and colour
Gelcoat or paintOf any kind and colour

3.4.1.2
The tiller and tiller extension may be made of any material.

3.4.1.3
Non-metallic reinforcement (bushing) of diameter not more than 20mm may be used around screws, rivets, or bolts.

3.4.2 Shape

3.4.2.1
The rudder shape is optional, but excluding the rudder fittings, it shall be capable of being laid within a rectangle of 750mm x 260mm. The rudder head is defined to be that part of the rudder located within a distance of 300mm from the upper edge of the rectangle. The rest of the rudder is the rudder blade.

3.4.2.2
The thickness of the rudder blade (excluding bevels) shall be not less than 10mm and not more than 14mm. Bevelling is permitted between the edges and the bevelling limits, situated 60mm from all edges. The thickness of the rudder blade between the bevelling limits shall nowhere vary by more the 0.5mm.

3.4.2.3
The tiller, tiller extension and associated fittings may be of any type, but they shall have no sharp projections.

3.4.2.4
The tiller and tiller extension shall each be not more than 750mm long and their combined length shall not be more than 1200mm.

3.4.2.5
Any part of the tiller which is aft of the rudder head frontline (see Class Rules 3.4.4 for definition) or its extensions shall be included in the rectangle (as defined in 3.4.2.1).

3.4.3
The assembled rudder, tiller and tiller extension shall float, and their total weight shall not be less than 1.5kg. Ballasting of any part of this assembly is prohibited.

3.4.4 Definition of Rudder elements

3.4.4.1
Bearing lines: two horizontal lines (parallel to the baseline) through the bearing points of the rudder fittings.

3.4.4.2
Rudder head front line: line passing through the intersections of the forward edge of the rudder and the two bearing lines.

3.4.5 Fixing and positioning:
Boats built before 1 March 1992 may either use the rudder positioning method which was applicable at the time of building, or the current one. The positioning fittings of the rudder themselves shall then comply with the correspondingly dated rules for the rudder.

3.4.5.1
Two pintles shall be fixed on the rudder, their diameter shall be not more than nominal 6mm. The distance between the upper edge of the tiller and the bearing line of the upper pintle shall be not less than 85mm, measured along the rudder head frontline. Two gudgeons shall be fixed to the aft transom, with holes not less than 6mm diameter. The distance between the bearing lines of the two gudgeons shall be not less than 200mm. The corresponding distance between the pintles shall be not more than 200mm. The depth of the pivoting holes in the two gudgeons shall not exceed 5mm, and the distances from those holes to the aft face of the aft transom shall not differ by more than 2mm.

3.4.5.2
The rudder and tiller assembly shall be fitted to the aft transom so that it does not become detached from the hull during a capsize. To this effect, an appropriate retaining clip/spring shall be fitted on the forward edge of the rudder head, not less than 5mm below the bearing line of the upper pintle.

3.4.5.3
When fitted to the aft transom, the distances from the rudder head frontline to the aft face of the aft transom, measured at the position of both bearing lines, shall be not more than 45mm and shall not differ by more than 2mm.

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