here is the current web site and NA Open F-20 rules
http://www.lakelaniersailing.com/f20class/ They were left open in some areas for further input by others interested -
The updates and changes proposed for 04 are more definition and following the specification class model I-20 more closely in intent,
filling in some potential loopholes ,
while allowing specs of other 20s as well.
changes are -
NA Open Formula 20
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.
Intent
To race 20-ft catamarans on a first across the finish line wins basis, both in around-the-buoys and distance racing.
N A Open Formula boat specifications and rules intent is to closely match the US version model specifications of the I-20, while accomodating existing iF 20S and existing class 20 ft cat designs in compensation of weight to sail area in formula, any new boat or modification of existing should consider the sprit of the class and intent of rules .
Length: 20' (6.10m)
Width: 8' 6" (2.59m)
Mast Length: 32' (8.13m)
Weight: 390 lbs. (177kg)
Mainsail with Mast: 208 sq. ft. (18m2)+mast
Jib: 53 sq. ft. (4.15m2)
Spinnaker: 270 sq. ft. (23m2)
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. The NA Open-F20 Committee will propose amendments to the rule if necessary. Amendments shall be placed on one year’s notice unless it is considered essential to act immediately to prohibit an unseaworthy feature. Formula 20 boats will often be sailed in 1000 MILE and extreme type distance racing events and all components are to be constructed accordingly and sailed extensively in varied conditions before competing.
N A Open Formula Class Specifications and Rules.
LENGTH - 20 ft one inch maximum (Stern to bow measurement)
BEAM - 8.5 ft –max.hull point measurement
WEIGHT –two categories of boat weight 389 Lb. and above
419 Lb. and above
*Definition boat weights –boat sails and all att gear fully rigged. Boats may add permanently fixed hardware ,fixtures, and floatation to meet minimum weight. Corrector weights up to 20 Lbs will also be allowed for boats under 389lb. total.
SAIL AREA –two corresponding categories
Category 1- 389 min boat wgt –> MAINSAIL = 208 sq/ft including mast, 53 sq/ft jib, and 270 sq/ft spin
Category #2 419 min boat weight -> MAINSAIL = 208 sq/ft including mast, 60 sq. ft jib and 300 sq/ft spin. Increases of 7-sq. ft. in jib and 30 sq. ft in spin area in 30-LB boat wgt differential.
Sail area may be traded off from main to jib of equal sq. ft to allow modification and design variation of sail plan to any maximum sail area combination of smaller main in category
*All measurements per standard current ISAF measurement rules
Mainsails must be within outline area and pattern shape of the current I-20 mainsail,Mainsails may be overlayed for measurement within existing class spec shape area and pattern .-excluding area added to lowermost sailpanel towards trampoline within 32 ft max mast height on standard mast base.
Roller furlers and mainsail reefing system of any type 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.
Sailmakers and/ or owners to list sq. ft in 2 inch numerals at the tack of each sail next to the sailmakers logo with signature over.
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. Those not in compliance will be DSQ for those races or legs of the distance race.
CREW – Two or more may be crew. All crews must be capable of righting from a capsize.
CREW WEIGHT -A class min of 320 Lb. Teams may carry weight to meet minimum weight requirements. Crew weight based on teams wearing standard swim apparel and shirt.
MASTS May be of aluminum and/or carbon fiber or combinations of non conducting materials in standard section per class spec model I-20-.
Existing H comptip masts may also be used.
Max. 32 ft mast length -
Standard wire rigging in any configuration
Max. 29 ft spin hoist height to spin.tang lead.
HULLS - Any standard material or configuration
BOARDS - Any standard material or configuration
alligned within 10 degrees of verticle .
RUDDERS– Any standard material or configuration
note min. boat weight of 389 Lb.
SPIN POLES –A maximum 14 foot length may be used not to exceed 4.5 ft beyond bow plane ,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 class specs. by F-20 committee 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 current NA N-6/0 with NE spin is F-20 compliant under dispensation ,-as is the current H-20 class with NE area spin.
note ; if changed from class sails or class specs as defined per class a coresponding change to standard spin area is then required per weight category at 300 or 270 sq ft.
Formula 20 Discussion Forum
Hosted by The Catsailor website
Class Contact - Open Formula 20
Carl Roberts [Email]crdesign@cac.net
