NATIONAL WINDRUSH CATAMARAN ASSOCIATION
                             (Incorporated)
                                 
                CLASS RULES AND SPECIFICATIONS
                                 
                 (Effective from 1 April 2014)
                                 
                             	CONTENTS
                                 
WINDRUSH CLASS RULES
                               		Clause      
Preamble                         	1           
Definitions                      	2-7         
Classes                          	8-10        
Hulls                            	11-16       
Beams and Trampoline Frames      	17          
Trampoline                       	18-22       
Rudders                          	23-32       
Spars                            	33-45       
Downhaul & Boom Vang             	46-47       
Mainsheet                        	48          
Standing & Running Rigging & Fittings	49-62       
Sails                            	63-93       
Personal Buoyancy and Safety     	94-100      
Teams Racing                     	101-105     
Scrutineering Certificate        	106-109     
SPECIFICATIONS
General                         	110         
Boat Weight                     	111         
Spars and Beams                 	112-113     
Standing Rigging                	114-115     
Production Form Sails                   116	    
Class Emblem                    	117         
These Class Rules were produced by the Windrush Catamaran
Association of Western Australia for and on behalf of the
National Windrush Catamaran Association.
Further copies can be obtained free of charge by contacting 
The Secretary, Windrush Catamaran Association of Western Australia.
or The Secretary, Windrush Catamaran Association of Queensland.

                          WINDRUSH CLASS RULES
PREAMBLE
1.   Windrush  catamarans  are intended to  be  one  design  class
     yachts and shall therefore be sailed as produced with only limited
     variations. Any effort on the part of anyone to alter the boat or
     its rigging, except as specifically authorised by these rules,
     which would result or in the opinion of a Protest Committee is
     designed or is likely to result in such a boat or its helmsman or
     both obtaining an advantage over its competitors is a breach of
     the rules not only in spirit but in substance and such a boat
     shall,  for  racing purposes, be deemed not to be a  Windrush
     Catamaran.
DEFINITIONS
"WINDRUSH PRODUCTION"
2.   Equipment  produced  or  sold as  standard  or  normal  extra
     equipment by Windrush Yachts, Perth (to May 1986) or Windrush
     Catamarans, Perth (from June 1986) or their licensed manufacturers
     with the permission of Windrush Yachts, Perth (to May 1986) or
     Windrush Catamarans, Perth (from June1986).
"PRODUCTION FORM"
3.   Similar  in design and function to "Windrush Production"  and
     offering no advantage.
"PRODUCTION ARRANGEMENT"
4.   Where  more  than one arrangement of fittings has been  sold,
     any  one  arrangement may be used but a  combination  of  two
     arrangements is not permitted.
"WEAR AND REPAIR"
5.   Where  an  item  is  subject to wear and tear  or  accidental
     damage  it  may be repaired in a manner intended to reproduce
     the  original shape or function.  When slight variations  are
     the  result  of  wear or repair they are acceptable  provided
     they offer no advantage.
                                
"COMPLIANCE"
6.   If,  as  a  result  of  a  protest, a  modified  or  repaired
     component is considered not to comply with these Class  Rules
     then that ruling shall only apply to future races unless  the
     protest   committee  considers  that  the  entrant  knowingly
     committed a serious breach of these rules for the purpose  of
     obtaining  an  unfair  advantage.  Where disagreement  occurs
     over  the  interpretation of these rules the  ruling  of  the
     National Council shall apply.
7.   Where it becomes necessary to determine whether equipment  is
     "Windrush Production" the advice of Windrush Catamarans  must
     be  sought. If a representative of Windrush Catamarans is not
     present  the question must be referred to them together  with
     sufficient   information,   including   photographs    and/or
     sketches if possible, to make a valid judgement.
CLASSES
8.   14'  CAT. This shall be a Windrush 14' with mainsail only and
     with a skipper  only, without a trapeze.
9.   14'  SLOOP. This shall be a Windrush 14' with a mainsail  and
     jib, with a skipper and one crew without a trapeze.
10.  SUPER  14. This shall be a Windrush 14' with mainsail  and  a
     skipper  only, with or without trapeze and with or without  a
     jib.
HULLS
11.  Hulls shall be "Windrush Production".
12.  The  position of and the method of attachment of forestays,
     side stays and transom fittings shall be "Windrush Production".
13.  Refinishing, painting, etc. of hulls is permitted but not to
     the extent that the general shape of the hull is altered.
14.  It  is not permitted to use a wetting agent on the hulls  for
     the purpose of reducing friction.
15.  Any  change intended to reduce the weight of production hulls
     is prohibited.
16.  The  addition of rubbing strips to the bottom of the hull  is
     permitted to maximum depth of 5mm.
BEAMS AND TRAMPOLINE FRAMES
17.  The  front and rear beams shall be "Windrush Production". This
     includes all fittings which attach them to the hulls.
TRAMPOLINE
18.  The trampoline shall be "Windrush Production".
19.  The  lacing arrangement pattern is optional and must use  only
     the  "Windrush  Production" attachments on the trampoline  and
     rear beam.
20.  The  number  and  position of hiking straps and  jib  sheeting
     eyelets  and  eyelets  for  the trapeze  shock-cord  shall  be
     optional.
21.  It is permitted to fit a storage pocket made of any material.
22.  It is permitted to add padding material to the hiking straps.
RUDDERS
23.  The  deep  rudder system shall be "Windrush Production".  This
     includes  the  cross  bar, tiller arms,  tiller  joints,  head
     castings, cheek castings and blades.
24.  The  type  and  means  of attachment of the  tiller  extension
     shall be optional.
25.  The  opening  in  the rear of the rudder head casting  may  be
     increased  in length to a maximum of 105mm measured  from  the
     rear edge of the casting.
26.  The  replacement of the "Windrush Production"  rudder  rollers
     with  those  of  another material or larger  diameter  is  not
     permitted.
27.  The  "Windrush Production" rudder pin may be replaced  with  a
     pin  of  a larger diameter to remove play between the  rudders
     and the hull.
28.  The  3/16"  bolt through the tiller arm which is  the  control
     stop for the internal spring must be fitted.
29.  Rudder  blades may be refinished, including painting, but  not
     to  the  extent where the shape is altered from the  "Windrush
     Production" profile or cross sectional shape.
30.  The  head  profile  of the "Windrush Production"  deep  rudder
     blade may be modified in the vicinity of the lock down notch and
     also adjacent to the base of the cheek casting to achieve uniform
     fore and aft alignment.

31.  Disc  rudder blades may be "Production Form". The profile  and
     cross-section  of  the blades shall not  vary  from  “Windrush
     Production”.   However, the blade thickness may  be  increased
     to a maximum of 22mm.
32.  Tillers  on  the  disc rudders may be angled inwards  to  give
     asymmetrical steering.
SPARS
33.  Unless  otherwise  specified, spars and all  fittings  thereon
     shall be "Windrush Production".
34.  It  is  only  permitted  to  use the Windrush  exclusive  boom
     section  sold  as "Windrush Production" since  about  1978  in
     National or State Championships.
35.  No  change shall be made to the "Windrush Production" mast  or
     boom  extrusions  which would have the  effect  of  lightening
     them  or  changing  their  characteristics,  eg.  pre-bending,
     tapering, staying, slotting, etc.
36.  It  is  essential that the flotation ability of  the  mast  be
     retained. A drain hole may be drilled in the mast provided  it
     is  fitted  with an effective plug to maintain  the  flotation
     ability.
37.  The  mast base is fitted with a positive stop to restrict mast
     rotation. Modification of this stop is not permitted.
38.  No  device is permitted which will allow control or adjustment
     of mast rotation angle whilst sailing.
39.  The  mast  head  may be modified by the removal  of  aluminium
     from  the rear of the head wheel surround casting. The maximum
     that may be removed is the rear quadrant of the casting.
40.  The  gooseneck  may be changed from the "Windrush  Production"
     standard item which is a slug fitted in the sail track in  the
     mast  below the sail opening. The approved replacement is  the
     "Windrush   Production"  stainless  steel  slide   arrangement
     fitted as a standard item on the Super Sloop mast.
41.  The bollard cleat on the mast may be shifted to a position  on
     the  side  of  the mast immediately adjacent to the  "Windrush
     Production' position.
42.  The  halyard  lock  shall  be "Windrush  Production"  and  its
     position shall not be changed.
43.  The  gooseneck  end  casting must be used  as  the  attachment
     point for the downhaul system.

44.  The "Windrush Production" staple type block hangers on the boom
     may  be replaced with a "Production Form" fitting within 50mm
     of the original position.
45.  The  boom  cleat for restraining the adjustable clew  outhaul
     shall be optional.
DOWNHAUL AND BOOM VANG
46.  Down  haul  and boom vang may be of "Production Form"  or  a
     similar arrangement to a maximum purchase of 8:1.
47.  The  methods of attachment of the downhaul and vang  to  the
     boom   and  mast  are  optional  provided  they  offer   no
     advantage.
MAINSHEET
48.  Mainsheet  blocks,  their  layout  and  the  rope  used   are
     optional.  However, the purchase shall not  exceed  6:1  (no
     more than six rope parts between the boom and the boat).  No
     additional  fixing mounts shall be used on  the  boom,  rear
     cross beam, hulls, trampoline or elsewhere.
STANDING AND RUNNING RIGGING AND FITTINGS
49.  Standing  rigging may be "Production Form" and all dimensions
     shall  be measured with 5 kilograms tension applied  at  the
     bearing  surface  of  the eyelets.  The  snaphooks  must  be
     captive on the end of the bridle and twin forestays  in  the
     same  manner  as those on "Windrush Production"  items.  The
     thimble must be secured through the eyelet of the snaphook.
50.  The  forestay  and bridle and side stays may  be  "Production
     Form"  and  fitted to the bow and chain plates saddles  with
     the snap hooks bearing the load. At the mast hound the stays
     may  be  connected to the mast using any combination of  the
     "Windrush  Production" shackles and/or a single adjuster  to
     provide a measure of mast rake adjustment.
51.  Running   rigging  shall  be  optional  with  the   following
     exceptions.
52.  The  main  halyard  shall be "Windrush Production".  However,
     the halyard lock must allow the sail to be lowered at sea by
     a crew member on the trampoline.
53.  The  adjustable clew outhaul is allowed provided there  is  a
     positive means of retaining the foot rope of production form
     dacron sails or the crew slug on "Windrush Production"  form
     mylar sails within the boom track and the purchase does  not
     exceed 3:1.
54.  The fitting of V type jam cleats for a jib/forestay tensioner
     line and a jib furler line is permitted.
55.  Righting  ropes shall be of "Production Form". The rope  shall
     be  not  less than 8mm in diameter and not less than "Windrush
     Production" in length.
56.  The  mast  step  fitting and its position shall  be  "Windrush
     Production".
57.  The fitting of a jib furler is optional.
58.  The  jib  sheeting arrangement may be "Production  Form".  The
     position  on  the front beam where the sheet ends  tie  around
     the beam is optional.
59.  The  jib  cleat  assembly may be "Production  Form".  The  cam
     cleats  may  be replaced by those of another manufacturer  and
     the  use of a swivel cleat is optional. The jib cleat assembly
     shall be fitted to a "Windrush Production" casting.
60.  The use of a tubular bow spreader is optional.
61.  When  sailed with a jib, twin "Production Form" forestays  may
     be used provided they are correctly fitted.
62.  Where  the  class permits the use of a trapeze the arrangement
     of  wires, hooks, retrievers and toe straps shall be optional.
     The wires may be fitted to an additional tang at each side  of
     the mast.
SAILS
63.  All  sails manufactured after 1 December 1996 shall not comply
     with the rules unless they are Windrush Production
64.  The  mainsail  and  jib  constructed  of  'Dacron'  shall   be
     "Production   Form"  and  shall  not  exceed  the   dimensions
     appearing in the WINDRUSH SPECIFICATIONS.
65.  "Production Form" sails shall not be constructed of kevIar  or
     any similar fibre or plastic film.
66.  Only "Windrush Production" sails may be constructed of mylar.
67.  Windows  in  either the jib or mainsail shall be optional  and
     shall have an area no greater than 0.3m2.
68.  The  provisions  of  the  IYRU Sail Measurement  Manual  shall
     apply  when measuring "Production Form" sails. However,  where
     the  WINDRUSH CLASS RULES and the IYRU Sail Measurement Manual
     are in conflict, these rules shall apply.
MAINSAIL
69.  Loose footed "Production Form" mainsails are not permitted.
                                 
70.  Sail  flattening zippers, lacing and Cunningham eyes
     are not permitted.
71.  Reefing  is  allowed provided it reduces the  luff  and  leech
     measurement  by not less than 300mm and is not removed  during
     racing.
72.  The  mainsail  shall  display  the  appropriate  class  emblem
     located  between the first and second battens  from  the  head
     and it shall be clearly visible.
73.  Sail  numbers  to be allocated solely by Windrush  Catamarans,
     Perth.
74.  The  mainsail shall be fitted with full length batten  pockets
     only  and  each pocket must contain at least one  full  length
     batten. The Windrush 14' shall have seven pockets.
75.  Sail batten types are optional.
76.  The  mainsail may be constructed with a headboard. The maximum
     dimension  of  the headboard measured at right angles  to  the
     luff shall be 150mm.
77.  Shock  cord is permitted for use as a bolt rope in the foot  .
     The  size  of  rubber shock cord must be capable of  retaining
     the foot in the track of the boom.
78.  Leech lines are not permitted.
79.  Reinforcement  of  the  leech and luff  of  "Production  Form"
     sails   is  permitted  using  conventional  sail  cloth  only.
     Kevlar, Mylar or similar plastic film shall not be used.
80.  Only  one  mainsail  may be used during a championship  series
     unless   approved   by   the   National   Windrush   Catamaran
     Association  Inc.  in the case of competition  at  a  national
     level or the appropriate State Association for competition  at
     state level.
81.  No recutting of WINDRUSH PRODUCTION SAILS shall be permitted.
82.  The  maximum  position  to which the  head  of  the  sail  (as
     described by the lYRU Sail Measurement Manual) may be  hoisted
     is level with the top of the mast extrusion.
83.  Mainsail Measurement Procedures for "Production Form" sails.
84.  The  following diagram of the head of the mainsail shall apply
     and  is  described as the highest point of the sail  projected
     perpendicular to the luff or its extensions.
85.  The following diagram of the clew of the mainsail shall apply
     and is described as the aftermost part of the sail projected to
     the foot or its extension.
                                 
86.  The  mainsail shall be measured in a dry state with the spars
     removed,  the battens slackened and the sail laid on  a  flat
     surface.
87.  Peg  the head of the sail. Apply 20 kilograms tension to  the
     tack cringle and 20 kilograms tension to the clew cringle.
88.  The  luff measurement shall be taken in a straight line  from
     the  head  to  where the sail enters the boom  track  at  the
     tack.   The  foot measurement shall be taken  in  a  straight
     line  along  the  boom from the point at the tack  where  the
     sail would reach the mast to the clew.
89.  The  leech measurement shall be taken in a straight line from
     the  head to the clew with just sufficient tension to  remove
     wrinkles across the line of measurement.
90.  The  1/8, 1/4, 1/2 and 3/4 cross width measurements are  made
     with  the  battens removed. Fold the luff so the head  covers
     the  tack and find the mid-point of the luff. Fold the  leech
     so  the  head is covering the clew and find the mid-point  of
     the  leech.  With the sail laid flat, measure  between  these
     two  mid-points  across  the  sail  with  sufficient  tension
     applied to remove the wrinkles. Repeat the operation to  find
     the  1/8 1/4 and 3/4 points on the leech and luff. The  cross
     width measurements shall exclude the width of the bolt rope.
JIB
91.  Only  one jib may be used during a championship series unless
     approved by the National Windrush Catamaran Association  Inc.
     in  the  case of competition at a national level  or  by  the
     relevant State Association for competition at state level.
92.  The  Production Form jib shall have no headboard, clew board,
     battens nor excessive stiffening designed to give extra  sail
     area.
93.  Jib  Measurement Production for "Production Form" sails.  The
     jib  shall  be  measured in accordance  with  the  IYRU  Sail
     Measurement Manual (Section 10.7 Headsails -Definitions).
PERSONAL BUOYANCY AND SAFETY
94.  All  competitors shall wear an approved aid  to  buoyancy  in
     good   repair  secured  about  their  person  in  the  manner
     appropriate to the design of the garment. Failure  to  comply
     may result in disqualification.
95.  All  competitors under 13 years of age must wear a Personal
     Flotation Device Type 1 which meets the requirements  of  the
     Standards Association of Australia AS 1512.

96.  All  other  competitors  must wear as  a  minimum  a  Personal
     Flotation  Device Type 2 which meets the requirements  of  the
     Standards  Association  of Australia AS  1499  unless  Sailing
     Instructions require a PFD Type 1.
97.  As  a  safety measure on catamarans sailed with crew, the crew
     must  be  able  to     maintain the boat head to wind  without
     assistance from the skipper.
98. (deleted)
99.  All  catamarans  competing shall have hull  identification  as
     prescribed by the AYF.
100. When  racing  with  disc  rudders it  is  recommended  that  a
     positive  means of retaining the rudder pins be employed,  ie.
     a  length  of appropriate sized flexible rubber tubing  fitted
     along  the  rudder pin above the gudgeon or the fitting  of  a
     pin through the rudder pin below the gudgeon.
TEAMS RACING
101. Each State Association shall be represented by one team only.
102. A  team  shall comprise four boats and consist of two 14'  CAT
     class catamarans and either two 14' SLOOP class catamarans  or
     one  14' SLOOP and one SUPER 14 class catamarans. In the event
     of  any  State Association being unable to field such a  team,
     the  composition of the teams may be changed by majority  vote
     of the team captains.
103. The  course  shall  comprise a triangle plus  a  windward  and
     return  lap  with the finish to windward. The triangles  shall
     have  60  degree  angles with each leg being between  900  and
     1100  metres  long. There shall be provision  to  shorten  the
     course at any mark.
104. Should  the  series not be completed on the day  nominated  in
     the  Sailing Instructions it shall be completed on a  lay  day
     or any other nominated resail day.
105. Teams races shall be conducted as prescribed by the AYF.
SCRUTINEERING CERTIFICATE
106. A  current  scrutineering certificate  must  be  held  by  the
     skipper of each competing Windrush catamaran.
107. The  expiry  date  of  scrutineering  certificates  will  be
     September  30,  each  year.  It is the responsibility  of  the
     scrutineer to ensure that all items on the certificate are sighted
     at the time of issue. It is permissible to have details on the
     certificate changed and authorised by the scrutineer from time to
     time  (eg. new hulls may be purchased which require  the  form
     amended).
108. Prior  to competing in National and State championship  events
     and  any other events determined from time to time by National
     and/or    State    Associations,   a   current   scrutineering
     certificate must be produced.
109. The   certificate  must   contain   the
     following:
     (a) Boat name and sail number.
     (b) Boat weight (dry) without any weights added.
     (c) Hull  registration  number and weight  of  each  hull  (if
         visible) which was affixed by Windrush Catamarans at  the
         time  of manufacture. These are stamped on the rear  beam
         pivot casting.
     (d) The   complicity  of  "Windrush  Production"  item:-   eg.
         hulls,  beams  and/or  tramp  frame,  trampoline,  rudder
         system, spars, jib sheeting arrangement, and sail, etc.
     (e) The  complicity  of  "Production  Form"  item:-  eg.  disc
         rudders,   mainsheet   system,  downhaul/vang,   standing
         rigging and running rigging, etc.
     (f) Length of bridle, forestay and sidestays.
     (g) Dimensions of "Production Form" sails.
            
                        WINDRUSH SPECIFICATIONS
GENERAL
110. This  section  deals with the specifications  which  apply  to
     those  items that are specified as "Production Form" or  those
     that  may  be assembled using "Windrush Production" components
     as  a  repair (For example a replacement mast extrusion to  be
     fitted  out  with  original "Windrush  Production"  components
     from a damaged mast).
BOATWEIGHT
111. The   Windrush  14'  shall  have  a  minimum  weight  of  77.1
     kilograms  (or  170  pounds). Boats shall be  weighed  without
     water   in  hulls  or  lockers,  lockers  empty,  minus  mast,
     rigging,  mainsheet,  blocks and  jib  cleat  assembly.  Boats
     fitted  with  disc  rudders shall  weigh  a  minimum  of  73.6
     kilograms  (or  162  pounds).  The  onus  shall  be   on   the
     skipper/owner  of  the boat to supply, fix  and  maintain  any
     weights required to comply with this rule.
SPARS AND BEAMS
112. The  distance from the bearing point of the "U'  in  the  mast
     base  casting   the  bearing point on the mast  hound  fitting
     shall be between 4.810 metres and 4.835 metres.
113. Front  and  rear beams shall be measured between  the  inner
     edges of the beam end castings (as per diagram) and the dimension
     shall be between 1.540 and 1.544 metres.  (diagram not reproduced
     in this electronic copy)

STANDING RIGGING
114. Forestays  and  sidestays shall be made from  stainless  steel
     wire of nominal diameter not less than 3mm.
115. Stay lengths shall be measured in accordance with Rule 49  and
     shall fall between the following dimensions.
      Windrush 14'
    
      Non-adjustable forestays.     5.200 to 5.240 metres.
      Adjustable single forestay.   4.575 to 4.610 metres.
      Non-adjustable side stays.    4.905 to 4.935 metres.
      Adjustable side stays. .      4.720 to 4.770 metres.
      Jib strop/forestay bridle.    Not less than 2.160 metres
      (measured between the bearing surfaces of the snap hook).
PRODUCTION FORM SAILS
116. Sails shall be measured by the procedure described in  rules
     84 to 90 and shall conform to the following maximum dimensions.
    
     Windrush 14'
    
     Mainsail
     Luff               6.46 metres
     Leech              6.46 metres
     Foot               2.27 metres
     Cross widths:3/4   2.21 metres
                  1/2   1.88 metres
                  1/4   1.25 metres
                  1/8   0.76 metres
     Jib
     Luff               4.29 metres
     Leech              4.00 metres
     Centre             4.21 metres
     Foot              1.435 metres
     Head               0.06 metres
CLASS EMBLEM
117. The  dimensions  and shape of the class emblem  shall  be  the
     same  as  those  used  on  "Windrush  Production"  sails.  The
     dimensions  appear  below.  (sketch  not  reproduced  in  this
     electronic copy)