F7500 Class Rules
Farr 7500 Class Rules
The object of these restrictions and rules is to establish control and maintain the Farr 7500 Trailer Yacht as a One Design Class. They aim to enable the family novice or expert to enjoy the pleasure of sailing and to ensure that racing depends on the skill of the crew.
The Farr 7500 Class Rules and Restrictions
1.1 To promote the objects of these restrictions and rules and to establish a class of boat which is one design in all matters which affect performance. The rules shall be interpreted in this spirit.
1.2 Tolerances in measurements are laid down only to cover unintentional variations in building and changes in shape through age or use. The exploitation of these tolerances shall not be permitted.
1.3 The FARR 7500 must be built from the official moulds of Bruce Farr Design No 76 and must be sold only by the manufacturer in a form which enables the boat to be completed so that it complies with these restrictions and rules.
1.4 The FARR 7500 must be maintained in the same form as when completed by the manufacturer in regard to deck layout, mast, rigging, sails, and general equipment. As a general principle any extra fittings or changes from standard shall not be permitted unless specifically detailed in these rules.
2.1 All hulls must be produced from the official moulds of Bruce Farr Design No 76. The length overall shall be: 7.458 m (± 12 mm)
2.3 The beam shall be: 2:500 m (±12 mm)
2.4 Construction. shall be of glass reinforced plastic to the manufacturer’s specifications.
2.5 The installation of flaps on the skeg to restrict the surging of water in the centre case is permitted.
3.1 All decks must be produced from the official moulds of the Bruce Farr Design No 76.
4. INTERIOR LINERS
4.1 All interior liners must be produced from the official moulds of Bruce Farr Design No 76.
5.1 Cabin layout must be as per the manufacturer’s specifications.
6.1 Ballast must be in the form of: Outside: Lifting keel made of cast iron weighing 204 kgs and made from the manufacturer’s moulds. Inside: Lead weighing 162 kgs situated under the interior liner at the forward end of the case as per designer’s specifications.
6.2 The lifting keel must be attached to the hull in accordance with the designer’s specifications.
6.3 The keel lifting wire shall be a minimum of 4 mm flexible wire.
6.4 No additional movable ballast other than standard equipment, safety gear and crew shall be permitted.
7.1 All boats must contain approximately 0.6 cubic metres of polurethane – P.V.C. Foam.
8.1 The rudder must be to the designer’s specifications. The rudder stock shall be made of aluminium or stainless steel and the blade made of fibreglass.
9. SAFETY EQUIPMENT
9.1 All boats must carry safety equipment in accordance with the New Zealand Trailer Yacht Association’s Safety Standards unless otherwise specified in these rules.
10. ANCHORS AND WARPS
10.1 Each yacht shall carry ready to use in a readily accessible stowage one anchor and warp as follows: Anchor: A Danforth 13S, C.Q.R. 8.2 kgs or, if of patterns other than these, an anchor of equivalent holding power. Warps: Warps must include a minimum of 3.8 metres of 6 mm diameter galvanised short linked chain. The total length of the warp shall be a minimum of 46 metres and must have a breaking strain of not less than 1360 kgs and should be of a synthetic fibre.
11.1 Whilst racing all boats shall carry the pop top in a closed condition at all times.
11.2 Whilst racing all boats shall have on board cabin entrance side panels and the main entrance wooden panels. The exception shall be that when racing inshore around buoys and marks under the supervision of a recognised Yacht Club or Squadron, the main entrance wood panels may be substituted by the plastic dome-on panel.
12.1 All bunk squabs shall be of 3 inch thickness foam and must be carried in their normal position while racing.
13. MAST AND RIGGING
13.1.1 The mast shall be an aluminium extrusion manufactured to the designer’s specifications. The mast and rigging must comply with the following specifications:
Height of mast above deck 9.100 m (±12 mm)
Height of spreaders above deck 3.270 m (± 12 mm).
Height of lower stays above deck 3.265 m (± 12 mm).
Height of hounds above deck 6.550 m (± 12 mm).
Side stays and lower stays must be made of 4 mm 1/19 stainless steel wire.
Forestay must be a minimum of 4 mm diameter 1/19 stainless steel wire.
Length of spreaders from side of mast to the bearing point of the sidestay wire shall be not less than 680 mm nor more than 880 mm (± 12 mm).
The maximum aft rake of the spreaders shall be 400 mm from the aft face of the mast track to the centre of a straight line from the end of each spreader arm where the wire bears of the spreader assuming a spreader length of 880 mm as in the above clause.
The height of the jib halyard exit above the deck shall be 6.440 m (±12 mm).
The height of the spinnaker halyard exit box above the deck shall be a maximum of 6.885 m (± 12 mm)
The spinnaker pole fitting on the mast shall be no more than 0.880 m (± 12 mm) above the deck and only one shall be allowed.
The main boom shall be an aluminium extrusion manufactured to designers specifications. The boom must comply with the following specifications:
14.1 Overall length from the aft face of the mast to the outer end of the boom when in operational position shall be 3.700 m (± 12 mm).
14.2 The boom vang shall lead from a position on the boom which measures 1.140 m (± 12 mm) form the aft face of the mast when the boom is in an operation position.
14.3 The mainsheet shall lead from a position on the boom which measures 2.910 m (± 12 mm) from the aft face of the mast when the boom is in an operational position.
14.4 The mainsail outhaul shall be a 3: 1 purchase and may be cleated on the main boom.
14.5 The flattening reef may be controlled by a 3: purchase system similar to the outhaul.
15 MAINSAIL, JIB AND SPINNAKER
15.1 All sails shall comply with the measurements and specifications detailed in Appendix 1.
15.2 A furling jib shall be allowed providing the sail complies with the specifications in Appendix l.
15.3 Sails will be restricted in number as follows:
1 x Mainsail
1 x No 1 Genoa
1 x No 2 Genoa
1 x Jib
1 x Storm Jib
1 x Spinnaker Small
1 x Spinnaker Large
15.4 The Class Sail Insignia must be displayed on the mainsail.
15.5 A Jib Cunningham may be permitted.
15.6 Mainsail controls other than the halyard shall be restricted to a luff Cunningham, an outhaul and reefing lines including a flattening reef.
15.7 The reefing line must be attached to the boom and the first reef and be ready for use at all times.
15.8 The use of barber haulers for spinnaker guy and sheet and genoa sheets is permitted.
16. DECK HARDWARE AND EQUIPMENT
16.1 Layout of deck fittings shall be maintained as per the designers specifications. Variation in the type of cleats shall be permitted.
16.2 Only 4 winches other than the keel winch shall be permitted.
16.3 Mainsheet traveller – maximum length of track (measured between end stops) to be 1.400 m.
16.4 The boom vang adjustment line may be lead aft and cleated on the cabin top.
16.5 No hydraulic equipment is permitted.
16.6 Electronic navigational aids shall be permitted
17. SPINNAKER POLE
17.1 The overall length of the spinnaker pole shall be a maximum length of 2.80 m (± 12 mm) measured from the face of the mast to the bearing point of the outer parrot’s beak fitting. Measurement will be taken with the spinnaker pole attached to the spinnaker bail on mast and square to mast and against forestay.
17.2 The spinnaker pole may be carried on the main boom or elsewhere but no self launching apparatus shall be permitted.
17.3 The spinnaker pole shall be made of 50.8 mm x 2.03 mm aluminium tube.
17.4 The spinnaker pole topping lift and/or downhaul may be adjustable.
18. 1 The minimum number of crew when racing shall be three people unless otherwise specified in the Sailing Instructions.
19.1 The weight of the boat shall be not less than 1200 kgs. This weight shall include hull, mast sails, standing and running rigging, squabs, outboard bracket, ballast, rudder tiller assembly but it shall not include the motor, fuel tank or any loose gear.
20. AUXILLARY POWER
20.1 Motor rating must be a minimum of 7 hp.
20.2 Outboard motors must be carried on a bracket on the transom.
FARR 7500 SAIL RESTRICTIONS
Mains and headsails shall be stretched out to remove wrinkles from edges when measuring.
Luff 8080 mm
Leech 8700 mm
Foot 3500 mm
The top batten pocket measured from the top of the headboard to the top of the pocket shall be not less than 1950 mm at the luff and 1760 mm at the leech. The pocket shall not exceed 1120 mm in length, measured along the top of the pocket.
Each of the other pockets shall not exceed 840 mm in length and be positioned as shown on the sail plan. Alternatively, the sail may have up to four full length or long battens (including the top batten). These shall be equally spaced along the leech. The reef positions shall be as positioned on the sail plan.
A cross measurement on the mainsail measured across the sail from a point on the luff derived from folding the head to the tack shall not exceed 2270 mm.
The top edge of the headboard and the outside edge of the the boltrope shall be the measurement points,
The minimum weight of the fabric for the main shall be 5.0 oz American weight dacron.
Luff 6920 mm
Leech 6040 mm
Foot 2600 mm
A cross measurement on the jib measured across the sail from a point on the luff derived from folding the head to the tack shall not exceed 1320 mm.
Three battens may be attached positioned equidistant along the leech of the jib. Each batten shall not exceed 300 mm. A self tacking jib to the above restrictions shall be permitted.
The minimum weight of fabric for the jib shall be 6.5 oz American weight dacron.
No 2 Genoa
Luff 7140 mm
Leech 6340 mm
Foot 3670 mm
A cross measurement on the genoa measured across the sail from a point on the luff derived from folding the head to the tack shall not exceed 1980 mm.
Three battens may be attached positioned equidistant along the leech of the jib. Each batten shall not exceed 300 mm.
The minimum weight of the fabric for the genoa shall be 3.8 oz American weight dacron.
Luff 5200 mm
Leech 4150 mm
Foot 2230 mm
The cross measurement on the jib measured across the sail from a point on the luff derived from folding the head to the tack shall not exceed 1140 mm.
The minimum weight of fabric for the storm jib shall be 6.5 oz American weight dacron.
Luff 6650 mm
Leech 6650 mm
Foot (1/2) 2080 mm
Luff 7500 mm
Leech 7500 mm
Foot (1/2) 2460 mm
The measurement from the top of head to bottom of head radials shall not exceed: 3660 mm (S); 3660 mm (L).
The measurement from the bottom of the head radials to bottom of foot tape shall not exceed: 3800 mm (S); 4600 mm (L).
The measurement across the spinnaker measured around the head base of the head radials shall not exceed: 4010 mm (S); 5070 mm (L).
The spinnaker shall be measured on the luff foot drop dimensions with the sail folded in half (luff to luff) and spread on flat on the floor and measured round the curves.
The cross measurement shall be measured with the sail smoothed out flat on the floor and measured from luff to leech along the base of the radial panels.
Where there is any doubt as to the sail conforming to plan the mylar templates shall be applied to check for accuracy.
The minimum weight fabric shall be 0.75 oz per square yard.
No 1 Genoa
Luff 7200 mm
Leech 6460 mm
Foot 4240 mm
The minimum weight of fabric shall be 3.8 oz American weight dacron.
Whenever Farr 7500 owners convene for a class regatta or event then the sailing instructions for the regatta shall direct the Officer of the Bay to poll skippers on whether or not to allow the use of the No 1 Genoa. This sail should be permitted only if it is available for all Farr 7500 yachts entered for the regatta or event.
Farr 7500 sails may be made by any sailmaker but strictly to class rule measurements.