Mission
For people of good will to race together for the enjoyment of the sport in accordance with the Racing Rules of Sailing and in the spirit of rule #2 of fair sailing under ISAF rules –To compete within recognized principles of sportsmanship and fair play.

Amendments
We wish to keep the rules as simple as possible and rely on the good intent of sailors in accordance with standard safety requirements per sailing rules, required gear, and class principles as stated. Amendments per majority vote of active class members.

Formula 20 Class Rules.

LENGTH - 20 ft one inch maximum (Stern to bow measurement)
BEAM - 8.5 ft –max.hull W L measurement at rest
WEIGHT –MIN boat wt 385 LBS
SAIL AREA – –> MAINSAIL = 210 sq/ft including mast, 53 sq/ft jib, and 270 sq/ft spin


*All measurements per standard current ISAF measurement rules

Roller furlers and main reef systems may be used.

All teams to use the same set of sails for a regatta or distance race, but may be replaced if severely damaged to allow a team to continue racing with the permission of race organizers per event racing instructions.

Mainsails are to be within measurement and pattern of, or identical to existing I-20 mains -

All sails are to be commercially available to any and all sailing teams min one month before an event or sails may not be used for that event.
Existing class cat designs will be accepted as listed per mfg. or sailmaker.
Racing will be on the honor system, but any boat may be challenged and checked along with the protesting party also being checked for weight and sail area compliance.

Teams developing Formula 20s are to assume existing standard configurations only are permitted based on existing boat features as listed..


CREW – One or more may be crew. All must be capable of righting from a capsize.

CREW WEIGHT -A class min of 320 Lb. Weight may be carried by lighter teams to meet minimum weight requirements.

BOAT WEIGHT -385 LBS fully rigged with all attached gear and sails

MASTS May be of aluminum and/or carbon fiber or combinations of non conducting materials in standard section tapered or uniform.
A Max 32 ft length
Standard wire rigging in any configuration
Spin bale leads to be min. of 41 inches or more from mast tip.

HULLS - Any standard material or configuration
BOARDS - Any standard material or configuration
angled or canted boards may be used.
RUDDERS– Any standard material or configuration
SPIN POLES –A maximum 14 foot length may be used made of any material in standard configuration with snuffer configuration of any type.
CLASS EMBLEM - The starboard side of the mainsail MAY carry the Open -Formula-20 logo of racing Formula 20s along with individual sail number for scoring purposes.


Dispensation
Older existing designs may be given dispensation per F-20 committee by owners request in design feature trade offs.
Example = an existing heavier mast rig and standard class smaller mainsail in compensation for larger spin area, again only applied to older existing designs per owners request.

The F-18 rules as accepted --
http://f18-international.org/rmeasurem.htm

Several pages of defined rules -
The main differences from F-20 are -

1- the existing condition of several different existing 20s -some built to EU F-20 rule but most popular widely accepted 20 in the US is the Inter 20 US version that is 30 LBS lighter with a larger sq top mainsail at 210 sq ft inc C F mast.-The proposed F-20 rule uses the US version Inter 20 model as guideline for basic class specifications and encourages all others to modify up to that maximum specification in matching length beam weight and sail area .

2--Due to varied existing 20s w C F masts -comptips- and various rigging etc -masts and sails are only limited to a closely matching 32 ft length with spin bale a min 41 inches below mast tip --limiting spin -mast -and matching pattern sq ft main sail that must be within the I-20 model and match or be within sail shape with same or smaller top .
3- crew weight has a min 320 LB with equal added weight allowed for lighter crews to compete ,-no upper weight category is used for added spin area as per F-18
A dispensation rule is in effect as per early F-18 allowing older unchanged existing 20s exempltion to use existing configurations and spin size ---example -the N A 6/0 with NE spin --proven in competition to be close , -may be used -but once modified in any form must then comply with all aspects of F-20 inc spin size of 270 sq ft .


4 -limits on sail material or hull materials --there is a min. boat weight of 385 LBS -which effectively limits the use of materials --epoxy is commonly used for repairs during distance racing --but prohibited in F-18 .
Reef systems are allowed in F-20 .

Other numerous lesser rule limitations are defined in F-18 -the intent clause of F-20 states standard practises and configurations ,-meaning any unusual or different feature not currently used by existing 20s is not allowed ,---all teams entering a F-20 event would be required to provide full discloser of F-20 boat type and all modifications from the base model prior to the event . Anything not expressly approved as a standard practise or configuration is prohibited .
The class intent is clear --to race 20s on a fair equal basis based on principles of sportmanship in accord with event and ISAF rules of fair sailing .