Proposed Rule Changes
2019 North American Spinnaker
Proposed by Larry King
Changing section 4.2.5:
4.2.5 Setting a spinnaker:
- When a spinnaker is set the pole shall be carried on the opposite side to the boom. A spinnaker shall not be set without a pole. The tack of the spinnaker that is set and drawing shall be in close proximity to the outboard end of the spinnaker pole except when hoisting, gybing or lowering. A whisker pole or spinnaker pole used to boom out a headsail may be carried on either side of the boat.
- Spinnaker Dimensions excluding North America:
Half height width not less than three quarters of foot width.
- Height. The sail is to held by the head cringle and the sail is to be under sufficient tension to remove wrinkles. No part of the fabric of the foot shall be more than 4572 mm from the highest point of the head.
- Width. Measurements shall be taken between points on the luffs at equal distances from the head. The sail shall be under just sufficient tension to remove wrinkles. The extreme distance between the outside edges of the fabric shall not exceed 2896 mm at any height. The width measurement between the mid point of each luff shall not be less than three quarters of the straight line width between the lower corners.
- Spinnaker Dimensions for North America Only:
- ***** Adding language in red *****
- ***** Seeking to use Wayfarer spinnaker *****
- ***** language pasted from Wayfarer class rules *****
- Leech length and luff length - 4750 mm
- Foot length - 3375 mm
- Foot Median - 4900 mm
- Difference between diagonals - 50 mm
- Half width - 3360 mm
- Primary reinforcement - 350 mm
- Secondary reinforcement:
- from sail corner measurement points - 600 mm
- for recovery line point, max 2 - 300 x 300 mm
- The below rules remain in effect for the North American spinnaker until December 31, 2019, at which time sails used at that time that conform to these rules below shall be allowed to continue in use, but no further sails may be made:
- The sides shall not exceed 4572 mm nor be less than 4420 mm.
- The foot may not exceed 3505 mm nor be less than 3353 mm.
- These measurements should be taken under 2.3 kg.
- (This requirement is optional at the discretion of the Race Committee).
- Girths shall be measured with the spinnaker folded in half putting the two clews together and then spread evenly and put flat on the floor. Two girth measurements ‘A’ and ‘B’ shall be taken across the sail.
- Measurement ‘A’ shall be taken a point 1372 mm down the luff and leech from the top of the sail and a point 1372 mm in a straight line down the opposite side of the sail as folded, not measuring around the contour. This measurement shall not be more than 1448 mm nor less than 1372 mm.
- Measurement ‘B’ shall likewise be taken between points 2438 mm down the luff and leech and 2438 mm down the opposite side of the sail as folded, not measuring around the contour. The measurement shall not be more than 1981 mm nor less than 1829 mm.
- When measuring girths it is important that the cloth between the head of the sail and points of measurement and immediately below, be spread out only enough to smooth out vertical wrinkles, but not enough to produce transverse wrinkles.
- When a girth measurement is taken there should be no tension on the lower
corners, nor at the girth points not being measured. Class numbers are to be on both sides of the spinnaker in any appropriate colour in figures not less than 305 mm high.