J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Spinnaker measurements

Class Rules provide the following....

5.12.6 Spinnaker

5.12.6.1 Minimum cloth weight is 40 grams or 0.75 oz. nominal and 0.9 oz. actual weight. Spinnakers must be made of nylon. Airex 650 is one of several approved spinnaker cloths that meet this requirement.

5.12.6.2 The maximum length of the leeches is 10.515 m. The half width at half height, measured from midpoint of the leeches to the nearest point on the centerfold shall not exceed 3429 mm (11.25'). The foot shall be contained by a 110° angle from the clews. Maximum spinnaker half width at any point on the luff shall not exceed 3429 mm.