Winch servo
IRSA Supported 65 Class Rules August 2018 15
(d) sails shall be measured as tri-lateral sails;
(e) discontinuous attachments on the luff shall be disregarded
provided their total length measured along the luff does not
exceed 15% of the luff length and the longest attachment is no
more than twice the shortest;
(f) where the sail has no clearly defined clew point, ERS G.4 is
altered and the sail edges shall be extended using a template
with 450 mm radius. See Figure J.5;
(g) where the sail has no clearly defined tack point a permanently
marked point on the sail edge shall be used instead. See
Figure J.5;
(h) cross widths shall be taken:
(1) on a double luff sail:
with the supporting spar in place,
to the luff, or to the fore edge of the spar,
along the surface and whichever gives the greater
dimension;
(2) on a sail with the luff set in a track in the spar, to the aft
edge of the spar;
(3) on other sails, to the luff.
G.2.4 CONSTRUCTION
(a) The construction shall be: soft sails.
(b) Sails shall be marked at the clew with their sail group code.
G.3 SAIL AREA
G.3.1 LIMITATION
The measured sail area of each sail group shall not exceed 225000
mm
2
.
G.3.2 CALCULATION
The measured sail area of each sail group is the sum of the areas of
the sails used together in each sail group, found using the method
prescribed in Section H and in the official sail certification
documentation.