CLASS ONE DESIGN RULES
The Chichester Scow is a one design scow
built only by Flight Marine Limited. The intent of these rules is to
maintain the Chichester Scow as a simple and economical one design
class, but not to prevent adoption of simple and inexpensive
modifications. The Chichester Scow Class Association is responsible for
the maintenance of these rules and inspection/acceptance of
modifications. Both GRP and wood/epoxy Chichester Scows should comply
with these rules in order to join Chichester Scow one-design races.
Although some Chichester Scows are supplied with jibs, their use is not
permitted in Chichester Scow One Design racing.
- Measurement Certificate
- Flight Marine Limited builds all
new Chichester Scows in compliance with these rules and issues the
first owner a Measurement Certificate at the time of delivery. The
Measurement Certificate remains valid for subsequent owners, but will
be invalidated when a modification is made beyond the scope or intent
of these rules.
All hulls will be built using only moulds
or jig tools at Flight Marine Limited. Hull mouldings shall not be
altered in any way, and wood epoxy hulls shall not be re-faired without
approval by the Class Association before repainting. Hull mouldings
shall have no further holes drilled or profiled for any fittings (e.g.
self bailer, stem towing eyes, name boards, etc.) other than those
supplied on the standard boat as defined by the General Arrangement
drawing. The hull identification number [HIN] is to be displayed
permanently on the hull moulding in the position shown on the General
The length, measured on the vessel
centreline, between the intersection of the transom and deck, and the
intersection of the stem and deck shall be 3465mm, with a tolerance of
The beam, measured athwartships at
a distance of 1400mm forward of the intersection of the transom and
deck at centreline, shall be 1390mm, with a tolerance of +/- 5mm.
Deck mouldings shall not be altered in
any way, other than drilling of holes for fixing new fittings. When
fitted, such equipment shall not admit any water to the enclosed spaces
between the hull and deck moulding. Unused fixing holes from re-located
or rejected fittings shall be efficiently sealed. Wood epoxy boats
shall not have any fittings that require drilling into the cedar hull
No control shall have an advantage
(power) greater than 2 to 1, except the kicking strap which may have up
to 4 to 1 advantage.
The centreplate shall be made of 8mm
thick aluminium [grade/or equivalent to 5083 or 6061-T6] to the profile
defined on the Flight Marine Limited centreplate drawing. The thickness
may be reduced only within 25mm of the leading edge profileand handle
area as shown on the drawing.
The rudder stock and tiller shall be made
of wood. The rudder blade shall be of wood with a minimum thickness of
9mm, to either of the profiles defined on the Flight Marine Limited
rudder drawing. The thickness of the rudder blade may be reduced only
within 50mm of the trailing and 25mm on the leading edge.
Optional fittings may include:-
- Clew outhaul line, turning block
and cleat on boom.
- Tack downhaul line, turning block
- Sail telltales and wind direction
- Jamming block/cleat on main sheet.
- Up to 2 toe straps.
- Reefing stops.
- 2 x rowlock holders.
- New design, smaller rudder blade.
- Non-slip paint or adhesive strips.
The following spars are permitted:
One standing lug.
All spars shall be constructed of wood
or aluminium, and may be from any manufacturer.
Spar dimensions, including fitting
sites and tolerances, are shown in the drawings.
Mast The maximum distance, measured along
the mast, from the bearing surface of the heel to the uppermost part of
the main halyard sheave on its centerline shall be 2720mm +/- 5mm.
Boom The total length of the boom shall
not exceed 3110mm. An attachment for a tack downhaul may be fitted not
more than 110 mm from the forward end. An attachment for a kicking
strap shall be fitted not less than 690 mm from the forward end. An
attachment for the main sheet shall be fitted not less than 2590 mm
from the forward end. Goosenecks are not permitted. The boom may be
lashed temporarily to the mast.
Lug The total length of the lug shall not
exceed 3110mm. A single attachment for the main halliard shall be
fitted not more than 1885 mm from the head end lashing hole.
The following standing rigging, made
from 3mm, 1 X 19 stainless steel wire, shall be fitted:
The chainplate positions shall be as
prescribed on the Flight Marine Limited general arrangement drawing.
Shroud and stay lengths shall not be
Only one halyard is permitted.
All Chichester Scow sails shall be
manufactured only by Arun Sails Ltd. to a standard computer based
design. All sails are to be constructed of Dacron, balanced type
sailcloth of weight 210 gms/sq.m. Sails may be of any colour. A makers
certificate that the sail has been manufactured in accordance with this
Rule shall be supplied with the sail and the sail itself signed and
dated by the Association-appointed Measurer to this effect. The sail
dimensions and materials shall be as shown on the Chichester Scow
mainsail drawing, recorded on the standard computer program and not
altered in any way without the formal permission of the Association.
One window is permitted, but shall not exceed 0.1 square metre in area.
The sail shall have at least one row of reefing points, enabling a
reduction in sail area of not less than 1.8 square metres. Not less
than 85% of the foot of the sail shall be attached to the boom.
The Class insignia "CS" and the number of
the boat shall be shown on both sides of the sail in clear characters
not less than 300mm high and 200mm wide (except for the numeral "1").
The characters must be black, on white or cream sails, or white, on tan
Sails supplied/constructed before
instatement of this Rule shall be allowed.
8. Equipment carried during racing
The Chichester Scow shall be equipped
with a bailer or bucket, tied to the boat with a lanyard.
A buoyant painter, capable of lifting the
weight of the rigged boat, minimum length 5m, shall be secured with a
bowline to the foredeck cleat.
Oars, rowlocks, paddles and other means
of propulsion are carried at the owners discretion, but may not be used
The weight of the dry standard sail-away
boat, including mast, spars, plate, rudder, tiller, sail, standing and
running rigging shall not be less than 105 Kg.
The following drawings are attached
with these rules:
General Arrangement, Sail, Spars, Rudder
[two designs], Centreplate.
Updated 20/1/02 and finalised.