Regatta-forum

Int. Finn Class Rules 1 March 2005

A.15 OLD BOATS


A.15.1 The following rules always apply:

C.9.4,
D.9 (except those related to gunwale rubbing strakes)
E.2.5 (b)
G.1.

A.15.2 Subject to A.15.1, a hull or other equipment not complying with current class rules, but complying with the class rules in force at a previous certification control, may retain certification, provided that the noncompliance does not give a racing advantage to the boat.

A.15.3 In particular, Rule A.15.2 can be applied with respect to centreboard thickness, centreboard coating, centreboard arm dimensions, centreboard weight, gunwale rubbing strakes, mast centre of gravity, mast bearing diameters and boom attachment arrangement. If Rule

A.15.2 is applied with respect to the boom attachment arrangement, then a mast lower limit mark must be made, complying with the older class rules (860 mm above the heel, width minimum 13 mm).

A.15.4 Altered or renewed equipment shall comply with current class rules unless, in the opinion of the certification authority, this is unreasonable.-

C.9.4 BOOM

(a) Dimensions

minimum maximum
Limit mark width ......................................................... 13 mm
Boom Outer Point from aft edge line........................................ 3270 mm

(b) Use

(1) The boom shall be fitted to the mast so that all parts rotate together.
Arrangements allowing over rotation of the mast are prohibited.

(2) Mainsheet and Mainsheet block attachments on the boom allowing
additional athwartship travel are prohibited.

(3) A stop shall be fitted so that rule C.10.3 (d) cannot be contravened.

D.9 ASSEMBLED HULL

D.9.1 DIMENSIONS

minimum maximum
Hull length .......................................................................4480 mm 4510 mm
Transom forward of Station 0: ................................................0 mm .......5 mm
Baseline below hull shell:
at station 1 .................................................................. 147 mm . 157 mm
at station 2..................................................................... 99 mm . 119 mm
at station 4 .................................................................... 35 mm ....55 mm
at station 6 ...................................................................... 6 mm ... 26 mm
Stem profile (outside stem band) to template: ........................0 mm .....10 mm
Sheer above position marked on stem template: ................-10 mm ...+10 mm
Keel Band Section radius (half round) ....................................6 mm
Stem Band (forward of Section radius................................6 mm
Centreboard Case;
slot width ......................................................................... 8 mm ... 12 mm
overall width............................................................................... ...100 mm
centre of centreboard pivot pin above underside of keel 40 mm ...50 mm
Fore and aft adjustment for centreboard pivot pin..................... .....20 mm
Hull shell to hull template:
at station 0, 2, 4 and 6 .....................................................0 mm ... 10 mm
Sheerline above position marked on template:
(Port) (Starboard)
minimum maximum minimum maximum
at station 0, 2, 4 and 6 .......-10 mm ...10 mm .............-10 mm ..+10 mm
Length of foredeck ...........................................................1350 mm.1450 mm
Length of aft deck ..............................................................550 mm...650 mm
Distance between side decks or built in tanks and the centreplane:
minimum maximum
at station 2 .................................................................. 410 mm
at station 3 .................................................................. 500 mm
at station 4 .................................................................. 490 mm
at station 5 .................................................................. 440 mm
Distance between side decks or built in tanks and the centreplane, at some
point between the sheerline and 100mm below the sheerline:
minimum maximum
at station 2 ................................................................................ .. 520 mm
at station 3 ................................................................................ .. 560 mm
at station 4 ................................................................................ .. 550 mm
at station 5 ................................................................................ .. 500 mm


9.1 Height of mast step above undersite of keel band

(a+b/2) - c = is maximum 56 mm

[Zeichnung fehlt]

Top of the deck at centreplane above the sheer
at station 0.......................................................................45mm .....55 mm
Top of the deck at centreplane above a straight
line between the stemhead and station 0 (excluding
breakwaters, hatches, cockpit coamings
and mast deck bearing arrangements) ................................-10 mm .....10 mm
Pads or recesses to mount or locate fittings........................-10 mm .....10 mm
Buoyancy: Support provided by flooded boat;
with buoyancy units intact............................................... 120 kg
with any one buoyancy unit flooded ................................ 90 kg
Inside diameter of buoyancy tank inspection holes .............95 mm
Gunwale rubbing strakes;
depth (down from the sheerline around the hull) ..........20 mm .....35 mm
width (at a right angle to the shell)..................................20 mm .....25 mm
Width of floorboards;
at station 2 .................................................................. 800 mm
at station 3 .................................................................. 880 mm
at station 4 ...................................................................720 mm
Floorboards or double bottom below sheer;
At station 2 ...................................................................285 mm
At station 3 ...................................................................325 mm
At station 4 ...................................................................375 mm
At station 5 ...................................................................375 mm
At station 6 ...................................................................390 mm
If fitted
Thwart;
thickness ....................................................................... 16 mm ... 26 mm
width .............................................................................. 70 mm ... 80 mm
aft side forward of station 4 ...........................................-10 mm ......50mm
top of thwart below sheer.......................................................... ...130 mm
Mainsheet traveller block (centreline of attachment);
Travel from centreplane of boat ................................................ ...550 mm
Travel forward of station 4 ......................................................... ...150 mm
Height of mast heel above underside of Keel Band......................... .... 56 mm
Height of mast bearing surface above deck..................................... .....10 mm
Horizontal play in bearings............................................................... .......5 mm
Number of holes in the transom....................................................... .......4
Diameter of 2 largest transom holes................................................ ...150 mm
Diameter of 2 other holes ................................................................ .....30 mm


D.9.2 WEIGHT


(a) Condition for weighing

For the purpose of Rules D.9.2, D.9.3 and D.9.4, the weighing condition for
the assembled hull with centreboard installed is as follows:
(1) If the Centreboard Pin, Mast Step and Deck bearing are movable, they
shall be in their maximum aft positions.

The weight shall be taken
(2) including centreboard, hiking pads, compasses, other fittings, securely
fastened containers, normal ropes and painter, but
(3) excluding timer, rudder assembly, mainsheet, paddle and bailer or
bucket.
(4) The hull, fittings and ropes shall be in a dry condition.
(5) Control lines and painter shall be pulled tight and wrapped around the
thwart.
(6) The centreboard shall be raised so that its lower corner is level with the
underneath of the hull (keel bands excluded).

(b) Weight minimum maximum

The weight of the hull and centreboard in dry condition .... 119 kg

D.9.3 HULL WEIGHT DISTRIBUTION AND CENTRE OF GRAVITY

(a) See Appendix H.3 for details of the Hull Weight Distribution and Centre of
Gravity Measurement.
(b) The following measurements shall be taken;
(i) Distance λ from the centre of gravity to Station 0.
(ii) Distance d of axis 01 to the underneath of the keel (keel bands
excluded).
(iii) Periods of oscillations: T1 around axis 01. T2 around axis 02.
(c) Dimensions minimum maximum
Distance λ.................................................................2100 mm .2290 mm
Distance h from underneath the hull (keel bands
excluded) to the centre of gravity (see H.3)................210 mm
Radius of gyration ρ .................................................1100 mm

D.9.4 CORRECTOR WEIGHTS

(a) Lead Corrector weights shall be securely fastened to the hull if
necessary to ensure compliance with D.9.2 and D.9.3. Corrector
weights shall be visible to allow for inspection without the use of tools.
(b) The total weight of such corrector weights shall not exceed 5 kg. The
number, position and size of the hull corrector weights, and notes of
other fittings (such as compasses and hiking pads) having a significant
effect upon compliance with D.9.2 and D.9.3, shall be entered on the
certificate.

E. 2.5 Dimensions

(b) Centreboard fitted in hull
Hole diameter larger than pivot pin diameter....................0 mm .......2 mm
Centreboard theoretical reference point
below hull shell (excluding keelbands)...................................... ...700 mm
Distance from hull datum point to aft edge of
partially or fully extended centreboard,
measured along the hull shell ....................................2050 mm
Projection below hull shell when fully raised ............................. .......0 mm

Section G ? Sail

G.1 GENERAL

G.1.1 RULES

Sails shall comply with current class rules.

G.1.2 CERTIFICATION

(a) An MNA may appoint one or more persons at a manufacturer to
measure and certify sails produced by that manufacturer in accordance
with ISAF guidelines.
(b) Sails shall be measured by an official measurer before leaving the sail
loft.
(c) Every sail shall have a new sail label certification mark purchased by
the sailmaker from IFA and permanently attached near the tack.
(d) The official measurer shall certify sails by signing and dating the sail
across the certification mark.

G.1.3 DEFINITIONS

(a) Sail definitions relating to ?mainsail? in ERS apply, except as varied in
G.1.3 (b) to (d).
(b) Upper Leech Point is the point on the Leech 425 mm from the Head
Point.
(c) Three-quarter Girth Point is the point on the Leech 1500 mm from the
Head Point.
(d) Middle Girth Point is the point on the Leech 3000 mm from the Head
Point.

G.1.4 SAILMAKER

Rule D.2.3 applies to sails.
G.1.5 IDENTIFICATION
(a) The national letters and sail numbers shall comply with the RRS.
(b) The class sail insignia shall be two blue waves approximately 700 mm
long. From left to right they shall go up, then down and up again. They
shall be placed in accordance with Appendix G of the RRS.
(c) The class insignia, national letter and sail numbers shall be made from
additional material of contrasting colour, firmly attached to the sail.
Painted class insignia, national letter and sail numbers are prohibited.

G.1.6 MATERIALS

(a) The sail shall be made of flexible materials, which may be laminated.
(b) Battens may be of any material.

G.1.7 CONSTRUCTION

(a) The construction shall be: soft sail, single ply sail.
(b) Continuous layers or fibres crossing the seams are prohibited
(c) The sail may have five batten pockets in the leech.
(d) The following are permitted: Seams, stitching, glues, tapes, bolt ropes,
tabling, corner eyes, headboard with fixings, Cunningham eye or block,
tack and Cunningham eye reinforcement, flutter patches, battens, batten
pocket patches, batten pocket elastic, batten pocket end caps,
headboard slides extending not more than 200mm down from the head
point, track slides, leech line with cleat, Velcro fastening, zip fasteners,
alternative foot ropes, tell tales, sail shape indicator stripes, sail
identification, sailmaker labels.

G.1.8 DIMENSIONS

In alteration to ERS H.5.1, sails may be measured with the battens in
position.
minimum maximum
Leech length .................................................................................. 6020 mm
Middle girth point to nearest point on the luff ** .............................. 1935 mm
Three-quarter girth point to nearest point on the luff ** ................... .1075 mm
** If there is a hollow at a girth point, this shall be added
to the measured distance (see ERS H.5.2).
Distance from a point on the luff 200 mm from the
head point, to the upper leech point. ........................................... ...375 mm
Top width ....................................................................................... .. 165 mm
Width of single ply panels ............................................................. 1000 mm
Head Primary reinforcement, down from the Head Point ............ ...200 mm
Clew Primary reinforcement ....................................................... ...350 mm
Secondary reinforcement:
from head point and clew point (2 layers) .............................. 1000 mm
for batten pocket patches ...................................................... .. 100 mm
Depth of headboard from head point.............................................. ...200 mm
Width of headboard ......................................................................... ...150 mm
Thickness of headboard .................................................................. .....20 mm

Batten lengths:
Uppermost batten:..................................................................... .. 400 mm
second batten:........................................................................... .. 600 mm
third batten: ............................................................................... .. 700 mm
fourth batten: ............................................................................. ...600 mm
lowest batten: ............................................................................ ...500 mm
Batten width: .................................................................................. .....50 mm
Batten pocket width, inside ........................................................... .... 50 mm
Head point to intersection of leech and upper part of
uppermost batten ....................................................... 960 mm
Distance from lower part of a batten at the leech to
the upper part of the batten below at the leech
or to the clew point .....................................................900 mm