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Rule
22.
22.
Overall hull
length, measured along the deck line,
is to be between 6044 mm and 6070 mm.
Reason:
The FD hull length is measured along the deck and not parallel to the DWL
and so this is not according to the ERS definition of the hull length. It
should therefore not be in bold. Changed to min and max and to nearest mm
as suggested by the CBB committee
Rule
39 Hull Weight
39.
Weight
The hull weight, including all
fixed and movable fittings buoyancy apparatus as prescribed in Rules 44-47
(whether removable or fixed) and running gear, but not including main,
genoa and spinnaker sheets, must not be less than a minimum of 130.0 kg.
Reason: These words clarify
the measurement and were inadvertently omitted in last years editing of
the FD rules. Wording as agreed with CBB committee.
57
Spars and Rigging
Mast. Rotating masts are
prohibited. The Mast Spar Curvature shall be less than 20 mm.
With the advent of carbon
masts in the class a quantitative value for the curvature is required.
58
Mast weight
58. The weight of the mast
(excluding trapeze hooks, shroud end fittings) must not be less than a
minimum of 10.0 kg (which will become 8.5 kg in 2008). Mast corrector
weights must be permanently attached to the mast.
The weight of Carbon masts
(excluding trapeze hooks, shroud end fittings) must not be less than a
minimum of 8.5 kg. Until 1 March 2008 carbon masts must carry a firmly
attached corrector weight, which is clearly visible when sailing, either
on the mast above the limit mark No 1, externally on the boom, or above
the deck at the mast partners. Except for World and European
championships, this requirement may be waived, if it is so stated in the
NoR and SIs.
The height of the centre of gravity of
the mast must not be less than a minimum of 2500 mm above the top
of Limit mark (band) number 1.
Reason: The class wishes to
ameliorate the advantage of the 8.5 kg carbon mast for a transition period
until 2008, to allow attrition of present aluminium masts and development
of affordable carbon spars. In order to achieve the appropriate
psychological effect the corrector weight 1.5 kg must be clearly visible
to competitors with aluminium masts. However, some National FD
organizations do not wish to have to carry this corrector and so it shall
be possible to waive this requirement, but not for WCs and ECs. On a
careful reading of the wording proposed by the CBB committee it was not
clear, so I have adopted the originally proposed wording.
Rule
60 Mast Spar Cross-Section
60.
Mast Spar Cross-Section, including the sail track
or its extension, for the
sections: Minimum Maximum
1) From the heel to the limit
point No 4, fore and aft 70 mm 100 mm
2) From the heel to the limit
point No 4, transverse 50 mm 100 mm
3) At the upper point, fore and
aft 35 mm 55 mm
4) At the upper point,
transverse 30 mm 50 mm
With proportional limitations at
intermediate stations of the mast between the limit point No 4 and
the upper point.
Reason: The introduction of
minimum cross section dimensions for the mast spar is designed to negate
any advantage of the use of high modulus carbon fibre, and thus hopefully
discourage its use. Note the minimum values are tentative and may be
altered after consultation with mast manufacturers.
The last sentence is to
prevent large mast tips that are just pinched in at the upper point. The
meaning is that say at the halfway point the limitations are 52.5 to 77.5
mm and 40 to 75 mm etc. The diagram below will be included in the class
rules
Rule
112 Expensive materials
112.
Expensive Materials
Unusually
expensive materials or equipment shall be deemed to be contrary to the
spirit of the class and may be prohibited. Before using such materials
and/or equipment, permission must be obtained from the General Committee
of the IFDCO. Composite materials such as those incorporating boron and
other materials of limited availability are prohibited. Carbon fibre (fibres
of graphite) and/or aromatic polyamides (aramids) such as Kevlar (Dupont
trade name) are prohibited in sails.
Reason: The class now wishes
to allow carbon masts, but still restrict the use of expensive materials
in sails.
P.F.Hinrichsen
FD
Class Chief measurer
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