OPEN FORMULA 20 CLASS



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 of various design features as a fleet on a first across the finish line wins basis, in buoys and distance racing.



Amendments—We wish to keep rules as simple as possible and rely on good intent of sailors in accordance with class principles as stated. Ammendments per majority vote of active class members.

The 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 or penalize an unseaworthy feature..



Basic specifications - OPEN FORMULA 20 .



LENGTH –20 ft one inch max. —Stern to bow meas.

BEAM - 8.5 ft –max.hull point meas.

WEIGHT –two categories of boat wgt. –376 Lb. and above

-410 Lb. and above

-Definition boat weights –boat sails and all att gear fully rigged

Boats may add permanently fixed gear and floatation to meet min.

Corrector weights will also be allowed for boats under 376lb. total.

SAIL AREA –two corresponding categories

376 min boat wgt –MAINSAIL =208 sq. ft inc. mast --53 sq. ft jib +274 sq. ft spin ,max.

410 min.boat weight MAINSAIL =208 sq. ft – 60 sq. ft jib + 290 sq. ft spin . max.

Increases of 7 sq. ft. in jib and 16 sq. ft in spin area in 34-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 max.S A combination of smaller main in category

All measurements per ISAF measurement rules, --see diagrams and instruction.



-Roller furlers and main reef points may be used.-

-All teams to use the same set of sails for a regatta or distance race .



Sailmakers and owners to list sq. ft in 2 inch numerals at the tack of each sail next to the sailmakers logo with signature over .Existing class cat designs will be accepted as listed per mfg.. -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.



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

-CREW WEIGHT –-A class min of 320 Lb., one half of weight below may be carried by lighter teams to meet min req.-Example –a 300 team may carry 10 Lb s to meet min.

Wgt based on teams wearing standard swim apparel and shirt.



-MASTS –May be of alum. or carbon fiber in standard section tapered or uniform and a Max 32 ft length. with-standard wire rigging in any configuration.



-HULLS -BOARDS and RUDDERS–Of any standard material or configuration.



SPIN POLES –a MAX 13 FT. length may be used made of any material in standard configuration with snuffer configuration of any type.





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CLASS EMBLEM



The starboard side of the mainsail shall carry the Open -Formula-20 logo of racing Formula 20s .

This plan seems simple enough to include a lot of existing crews,,, and if I am not mistaken, some of the newer boats on the drafting boards and in the moulds. That gives it a chance of easily occurring.



Just a point of clarification, please. Does the 208sqft mainsail limit include the mast area ??

Hi Alan



Yes ,-based mainly on I-20 specs which is fractionally under 208 sq ft inc. mast area , though may fine tune to 210 to give some room to existing boats to change , with the 32 mast length the luff dim. and aspect ratios should remain basically the same .-Worry a little about sail stretch with spin particularly in measuring sq ft over time .Would not want to have someone with an older sail inadvertantly measure over due to material stretch.



Tryed to keep them as simple and inclusive as possible,



Is there interest on the west coast Alan ? -

Been away for a while...



Hi Carl,



Nice work, sooo what's the next step ?

How do we proceed from here ?



An F-20 start at Lake Hartwell ?



Hope to see a local fleet of F-20s building.



Marc

Hi Marc

Hope this is a good rules basis to start the 20 Class from .



Have you run through the ISAF or Texel numbers on these ,just to double check , -we should list those along with a more detailed general class policy and future goals .



Wanted to include the existing Tornado weight of 376 lbs to potentially include modified Tornados to 8.5 ft beam and potentially in the future to allow them to race with the F-20s in the same start at regattas and if desired add a wind speed factor to them in higher wind speeds to compensate the added 10 ft beam . -this can develope seperately over time ,but is a nice option for T sailors to race in larger fleets at open type regatta events.



-will finalize with recomendations and get it on a web site soon .

thanks -



-

I will get back to work on the ISAF based sail area to weight eq.





Did you get my e-mail w/short video ?

New e if any need to reach me -

carlcrdesign@aol.com



the send message works well also -



sent a couple -

Carl