When racing or building, one must adhere to
the Class Rules for the particular class of boat. For the
FORMULA 48 Class, rules have been specifically kept to a minimum
to encourage new ideas, designs and concepts. This class is a
"DEVELOPMENT CLASS" of boat, where everything is legal unless noted
otherwise. Basically, the boat must have two or more hulls, but can
be of catamaran, trimaran, or proa design. Overall length and
overall beam is specified, as is maximum sail area. Please see the
Class Rules (below) for specific rules, measurements or
The Formula 48 Class is an open and fully developmental class of Radio
Controlled sailing multihulls, administered by owner/members of multihull
yachts meeting the class rules. As a Class Owners Association, it is the
owner/members who will decide on rules, vote on any required changes,
propose any new rules, and control class specifications.
Boats eligible to
participate in this class will have a minimum of two (2) or more
The overall length of
the boat will not exceed 1220 mm in length. (48 inches-reference)
Transom mounted rudders will
be included in the overall length.
The overall beam of the
boat will not exceed 1220 mm in width. (48 inches-reference)
Hulls may be of any design and
constructed out of any material, but must
not exceed measurement
There is no minimum weight for
the boat, the rig, the sails or all-up sailing weight.
Hull identification marks are
optional - but not mandatory.
Moving ballast is permitted,
but cannot be heavier than lead. Water ballast is permitted and can be
added, moved or removed during racing.
The front of all hulls, amas,
or floats must contain some form of elastomeric (bumper)
The rig ( that part which supports
the sail or its equivalent) may be made of any material, construction or
design, providing it meets measurement limitations.
When any portion of a mast(s) supporting a
soft sail, exceeds 19.045 mm in the fore/aft measurement or 19.045 mm in
diameter in the case of a round mast the vertical surface area must be
included as part of the calculated sail area. (3/4 inch reference)
When any portion of a boom (jib or main)
exceeds 19.045 mm in vertical dimension, or 19.045 mm in diameter if
round, the vertical surface area of the boom(s) must be included in the
total calculated sail area. (3/4 inch
Rigs with sails that can be reefed, are
allowed at major regattas or class championships. The sails attached to
the rigs may be of any legal size, shape or design. The "RIG" may not be
changed during a race, but it may be changed between races to compensate
for changes in wind strength. Sails, if reefable, may be changed during
a race to compensate for changes in wind strength
Multiple masts on a single boat are
permitted. When using one or more masts on a single boat, the total
number of masts count as one rig for purposes of Rule C-4 (above).
Kite sails are prohibited
Spinnakers may be used only during one-way
speed trials. There is no limit to spinnaker size, shape or area.
Sails may be of any design (except for Rule D-2 above) and constructed out of any
material, but must not exceed measurement limitations
If a solid wing sail(s) is used, the total
calculated sail area shall include all vertical surface area exposed to
the wind. The thickness of any solid wing or wing mast shall not be part
of the calculated sail area.
At a minimum, at least one (1) sail shall
carry the class logo, the assigned sail number and the abbreviated name
of the home country. Sail graphics shall be such so as not interfere
with the legibility of the logo, number or country. If area permits,
sail numbers are encouraged on any headsail as well as the main sail.
The sail area will be limited to a
calculated area of 0.9 m2 (1394.00 square inches reference).
See Rules #C-2 and C-3 above.
ADMINISTRATION & GENERAL
- The U.S. Formula 48 Class Owners Association
(herein after called the Formula 48 Class Association) is the current
authority for this class and administers all rules.
- Rules for the class may only be changed
every ten (10) years and requires an 75% majority of votes cast by
registered owners. The Class Association retains the ability to make
minor and insignificant changes to rules during this ten year period,
providing changes are for clarification purposes only, and do not impact
the intent of the rules. Such clarification changes made do not require
the vote of the membership, but must be announced prior to making the
- The Formula 48 Class Association shall have
the authority to set membership requirements for the class, including,
but not limited to any membership fees. Membership fee changes are not
subject to the ten year rule change limitation. Members from outside the
United States may join as members, but may not vote unless they are also
a currently registered AMYA member.
- There is no building fee required to be paid
to the association.
- Advertising, is open, unrestricted and
permitted. Sponsorship of any yacht is permitted.
- Skippers and/or owners are responsible to
assure their boats meet the measurement rules, and boats are subject to
random measurement checks at regattas.
- All measurements given are maximum, meaning
dimensions exceeding the amounts shown are prohibited. Dimensions,
lengths and sail areas must be exactly the dimension shown - or
- Sail areas shall be calculated using any
normally accepted method for mathematically calculating surface area.
- The Class Association will assign sail
numbers and provide the class logo to any registered member. Sail
numbers shall be of a size and thickness to be easily distinguishable by
race committee judges and officials. Numbers shall be of contrasting
color to sail material color. Skippers are responsible to assure sail
numbers are legible at regattas.
- Racing Rules as prescribed by the ISAF-RSD
shall be followed for all major regattas or championships, but may be
amended in writing by the race committee as provided in the Notice of
Race, or posted prior to the start of the race.
- Any yacht, currently meeting the measurement
and rules requirements for the MINI 40 Class is eligible for the Formula
- These rules are Copyright February 2000 by
the Formula 48 Class Owners Association. Permission to use these rules
for unlimited reproduction for the purpose of education of potential new
members is hereby granted.
These rules are supplemented by the
following documents unless herein amended:
ISAF Radio Sailing Division "International Class Administrative
ISAF Radio Sailing Division "Sail Identification Mark Rules"
ISAF Radio Sailing Division "Resolution, Error and Accuracy of
Mast areas for any plan form are measured only when any average
chord dimension exceeds 19.045 mm in the fore and aft direction, with the
mast centered (if mast rotates) and Boom areas for any plan form
are measured only when any average chord dimension exceeds 19.045 mm in
the vertical direction. Area is calculated per the following:
Other Area Calculations
1. The mast area when required for inclusion in the total
sail area, is computed by the following formula:
Sm = H x E
Where H is the total length of the mast, from deck to top of mast,
E is the average horizontal dimension of the mast (chord length),
measured fore and aft and a minimum of five (5) measurements shall be
made along the mast length to determine the average chord length.
2. The boom area shall be measured in the same manner when
required, and shall be added to the totals of the mast and sail area
to determine total sail area.
Sb = H x E
Where H is the total length of the boom(s) measured fore and aft, E
is the average vertical height dimension of the boom and a minimum of
five (5) measurements shall be made along the boom length to determine
the average chord length.
3. Solid wing sails shall have their entire projected
vertical surface area measured and must comply with total sail area as
specified in these class rules. The vertical surface area created by
the width of the leading edge of the wing is NOT included in
total sail area. Any leading or trailing edge solid wing "flaps" must
be measured separately and included in the total sail