Lightning

Tuolta löytynee:
http://www.lightningclass.org/technical/

Article V lienee mitä etsit ja sieltä kait pykälä 80
80. Measurement of sails. Sails are measured with the cloth pulled out to its normal size as set on the spars. Except at the main headboard and jib head the points of measurement at the corners of the sails shall be taken at the intersection of the extended lines of the extreme edges of the sail, including bolt ropes or tapes, but not including hoisting pendants, external cringles, etc. Sails shall be dry when measured, and when a sail has been measured and found to be outside the Specifications, it shall not be remeasured for the same regatta until proof of actual reworking has been submitted. If a spinnaker does not measure in initially, it may be dried or otherwise suitably altered and remeasured once. If, upon measurement, the spinnaker is still found to be out of specification, the required alteration shall be indicted by the regatta measurement committee and upon proof of such actual reworking shall be accepted for that regatta without further remeasurement.

Mainsails. The leech, measured from top of headboard to clew, shall not be greater than 7467.60 mm (24' 6") nor less than 7213.60 mm (23' 8") when measured under a 2.2679 kg (five pound) tension. The mainsail headboard may be of wood, metal, thermoplastic, mylar and layers of sailcloth. It must not be more than 101.60 mm (4") across, measured perpendicular to the luff of the sail. The top of the headboard must not be more than 19.050 mm (3/4") higher than the top of the uppermost hoisting hole.

Roach and draft shall be measured with the sail on the floor and all looseness pulled out of the sail. At a point on the leech measured down from the head 2133.60 mm (7'), a measurement shall be taken to the nearest point on the luff. This measurement shall not be more then 1104.90 mm (3' 7-1/2").

A similar measurement taken 3987.80 mm (13' 1") down shall not be more than 1969 mm (6' 5 1/2").

Another similar measurement taken 5874 mm (19' 3 1/4") down shall not be more than 2629 mm (8' 7 1/2").

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