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Open 20 rule set: 1 October 2011 #238476
10/01/11 06:44 AM
10/01/11 06:44 AM
Joined: Jul 2005
Posts: 267
Ocean Springs, MS
Capt_Cardiac Offline OP
enthusiast
Capt_Cardiac  Offline OP
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Joined: Jul 2005
Posts: 267
Ocean Springs, MS
Rules for the Open 20 Class:
1 October 2011

The OPEN 20 is Box Rule Set designed to foster the development and progression of the 20 foot racing catamaran fleet by permitting manufacturers and owners to institute improvements within existing fleets and encouraging development and innovation within the parameters of the Class.

1. Intent and Objective

1.1. The intent of the OPEN 20 Class is to open the platform and sail plan to improvements by providing maximum and minimum parameters for the class to develop within. It is specifically the intent of the class to permit any modifications that are not specifically prohibited by these rules within the spirit of the class.
1.2. The OPEN 20 Class is open to any two-hulled sailing boat with essentially duplicate or mirror image hulls, fixed in parallel or near parallel positions.

2. Overall Length
2.1. Any new OPEN 20 build shall comply with a 20 foot overall length requirement. The length shall be measured between perpendiculars to the extremities of the hulls with the catamaran in her normal trim. The measurement shall be taken parallel to the centerline of the craft and shall exclude rudder hangings.

2.1 “Grandfather”—Any legacy “20 ft.” catamaran, defined as a catamaran >=19 feet and <=20’6”, built on or before the adoption of this Class shall be permitted in the OPEN 20 Class provided that it otherwise meets the Class requirements.

3. The sail plan shall consist of 1 mainsail, 1 jib and 1 spinnaker that shall be carried aboard.
3.1 Sails may be manufactured by any sail maker and will be measured in accordance with the F16 sail measurement guidelines

3.2 A measurer recognized by the OPEN 20 class shall certify all sails.

3.3 Each sail maker shall present a certification of the sail’s measurements.

3.4 No sail shall be replaced during a regatta, except when a sail has been lost or damaged, then only with permission of the Race Committee.

3.5 Total sail area of the 3 sails and mast shall not be more than 50 sq. meters (538 sq. ft.). The jib is required to be at least 9.5% the area of the main sail. The total sail area can be no greater than 50 sq/meter.

3.6 Once measured and certified, the sq. foot/meter measurement of each sail shall be indelibly marked near the tack point of the sail for future verification.

4. Mast—The mast may be built from any materials and may be any length provided that the total sail area limit is not exceeded.

5. The beam of the catamaran shall not exceed 8 feet 6 inches.

6. The minimum weight of the boat in full trim shall not be less than 350 lbs.

7. Crew Sailing Weight: Minimum crew sailing weight is 325lbs. If you require corrector weights to meet the 325 lbs minimum they will be attached to the main beam or placed in the hulls evenly distributed side to side. They may not be moved during the racing.

8. Team size: 2

9. Rule Development-As a developing class, registered member suggestions and discussions will drive change.
9.1. After the first year re-address rules 9.2. Thereafter, every 3 years re-address rules


Capt Cardiac
Ocean Springs Yacht Club
Sailor
Nacra20 - Flight of Ideas #5
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Re: Open 20 rule set: 1 October 2011 [Re: Capt_Cardiac] #238477
10/01/11 06:46 AM
10/01/11 06:46 AM
Joined: Jul 2005
Posts: 267
Ocean Springs, MS
Capt_Cardiac Offline OP
enthusiast
Capt_Cardiac  Offline OP
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Posts: 267
Ocean Springs, MS
After much discussion, the Open 20 working group has agreed upon a set of rules to govern the new Open 20 class. Below is the rule set to govern the first Open 20 event scheduled for 8-9 October 2011 at Key Sailing in Pensacola, Fl. "2011 Nacra 20 (and then some) North American Championships" This rule set is designed to be reconsidered in 1 year.

The intent of the rule set is spelled out in section 1.1. It is not intended to exclude anyone from the class but to open the options available to you for new sails, replacement parts, etc. The "etc." is up to you. It is our hope that this class will encourage people to renovate the existing fleet to compete with each other and to remain competitive with the rest of the DPN fleet. Eventually, we would like to see new platforms being built to grow the class and become a thriving Open 20 class.


Capt Cardiac
Ocean Springs Yacht Club
Sailor
Nacra20 - Flight of Ideas #5
Re: Open 20 rule set: 1 October 2011 [Re: Capt_Cardiac] #238484
10/01/11 09:39 AM
10/01/11 09:39 AM
Joined: Sep 2002
Posts: 3,221
Roanoke Island ,N.C.
Team_Cat_Fever Offline
Carpal Tunnel
Team_Cat_Fever  Offline
Carpal Tunnel
Joined: Sep 2002
Posts: 3,221
Roanoke Island ,N.C.
What changed from the F20na ruleset?
I hope you plan on sticking with this one. It doesn't foster alot of trust when the rules and name get changed so quickly.


"I said, now, I said ,pay attention boy!"

The cure for anything is salt water - sweat, tears, or the sea
Isak Dinesen
If a man is to be obsessed by something.... I suppose a boat is as good as anything... perhaps a bit better than most.
E. B. White
Re: Open 20 rule set: 1 October 2011 [Re: Team_Cat_Fever] #238487
10/01/11 11:45 AM
10/01/11 11:45 AM
Joined: Jan 2008
Posts: 3,655
Portland, Maine
T
ThunderMuffin Offline
Carpal Tunnel
ThunderMuffin  Offline
Carpal Tunnel
T
Joined: Jan 2008
Posts: 3,655
Portland, Maine
So

No restrictions on materials.

No restrictions on boards of any type.

No restrictions on rig except that you HAVE to have a jib it appears (sorry M20 owners - guess you could always build a wing)

No problems with extending the rudder appendage off the stern like they did in the C-cats.

No restrictions on trapping racks or wings (not the wing sails)

I mean, this is pretty much an arms war if you ask me.

Re: Open 20 rule set: 1 October 2011 [Re: ThunderMuffin] #238493
10/01/11 06:03 PM
10/01/11 06:03 PM
Joined: Jun 2002
Posts: 806
Toronto, Ontario
pitchpoledave Offline
old hand
pitchpoledave  Offline
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Toronto, Ontario
cool I can put 8.5' beams on my F20c and have a smaller main cut and I measure in?

Re: Open 20 rule set: 1 October 2011 [Re: pitchpoledave] #238494
10/01/11 06:31 PM
10/01/11 06:31 PM
Joined: Sep 2007
Posts: 33
Hong Kong, NYC, NZ
Q
Questioner Offline
newbie
Questioner  Offline
newbie
Q
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Posts: 33
Hong Kong, NYC, NZ
This should be renamed the "Retarded 20 Rule Set", even kindergarden kids can exhibit more progressive logic than this rule shows

Re: Open 20 rule set: 1 October 2011 [Re: pitchpoledave] #238565
10/03/11 08:02 PM
10/03/11 08:02 PM
Joined: Jun 2001
Posts: 3,116
Annapolis, MD
Mark Schneider Offline
Carpal Tunnel
Mark Schneider  Offline
Carpal Tunnel
Joined: Jun 2001
Posts: 3,116
Annapolis, MD

Quote
cool I can put 8.5' beams on my F20c and have a smaller main cut and I measure in?


Why would you do that? What race would be worth it to you to bastardize your Cadillac ride?

To the organizers of this rule...
What is your thinking about a min boat weight of 350? How do you think you can get decent racing when the founder boats are 50 + lbs heavier?

If weight doesn't matter... why the min crew weight?


crac.sailregattas.com
Re: Open 20 rule set: 1 October 2011 [Re: Mark Schneider] #238665
10/05/11 08:26 AM
10/05/11 08:26 AM
Joined: Jul 2005
Posts: 267
Ocean Springs, MS
Capt_Cardiac Offline OP
enthusiast
Capt_Cardiac  Offline OP
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Joined: Jul 2005
Posts: 267
Ocean Springs, MS
Good question
Originally I proposed a 320lbs boat. Why? Because there is no reason in this day and age that a 20 ft boat should have to weigh 400 lbs. I picked 320 because it's 100lbs lighter than my old 6.0 I sailed. Everyone knows how painful it is to move boats around the beach and truthfully this weight issue keeps people from sailing. Just ask the F16 guys how much they miss their heavy boats. There was so much criticism of this detail that we compromised at 350. Ideal? Not at all. Keep in mind the rule set is designed to get the class started and the interested parties have the chance to ammend/change the rules in a year.

Crew weight? I recommended no limit. Look at the original set. Again, there was much weeping and gnashing of teeth over this so we included the minimal weight. Ideal? No. I don't want to pull out scales but if some smart butt wants to race his 20 with his 1 yr old daughter and call it 2-up then this rule calls them on it. You know how these boats perform in even 10 kts of wind they like some weight on the wire.

I hope we can get past the rhetoric and work through the real questions that matter to the class. I am fully aware there are plenty of people that have strong emotional opinions on this issue but that doesn't mean we don't evolve the class. It's been discussed for years and shot down because no one has been up for the task. Our small consortium is trying to make some happen. If sailors don't want to support then that is their prerogative but I ask that if they don't want to participate please don't try and derail our efforts. Please be a part of the discussion. We all love saili g and want to see our sport thrive. We just have different opinions how that should happen.

Thank you for your questions. I'm very willing to discuss every detail in the rule set.


Capt Cardiac
Ocean Springs Yacht Club
Sailor
Nacra20 - Flight of Ideas #5
Re: Open 20 rule set: 1 October 2011 [Re: Capt_Cardiac] #238676
10/05/11 02:53 PM
10/05/11 02:53 PM
Joined: Jun 2001
Posts: 3,116
Annapolis, MD
Mark Schneider Offline
Carpal Tunnel
Mark Schneider  Offline
Carpal Tunnel
Joined: Jun 2001
Posts: 3,116
Annapolis, MD
My advice... It's about the events! If the events are worth your while to win.... people will tweak their boats... build new ones or train to improve their performance. The more people engaged in these games... the more fun had by all.

Last edited by Mark Schneider; 10/05/11 08:49 PM.

crac.sailregattas.com
Re: Open 20 rule set: 1 October 2011 [Re: Mark Schneider] #238684
10/05/11 08:39 PM
10/05/11 08:39 PM
Joined: Jul 2005
Posts: 267
Ocean Springs, MS
Capt_Cardiac Offline OP
enthusiast
Capt_Cardiac  Offline OP
enthusiast
Joined: Jul 2005
Posts: 267
Ocean Springs, MS
I agree. We will have a slate of races for the 2012 season no later than Jan 10.


Capt Cardiac
Ocean Springs Yacht Club
Sailor
Nacra20 - Flight of Ideas #5
Re: Open 20 rule set: 1 October 2011 [Re: Capt_Cardiac] #240773
12/02/11 06:30 PM
12/02/11 06:30 PM
Joined: Feb 2004
Posts: 60
Kaneohe Bay
D
Dray Offline
journeyman
Dray  Offline
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D
Joined: Feb 2004
Posts: 60
Kaneohe Bay
Capt C,
I see you have started something here and I'm guessing the next step would be some sort of class orginization with a mission statement, bylaws and elections? You have my attention way out here in Hawaii. Waiting on the fence under my coconut tree,
Dan'o


NACRA Dealer
NACRA Infusion "sailing"
Hobie Tiger "sold"
Hobie 20 "sold"
Re: Open 20 rule set: 1 October 2011 [Re: Capt_Cardiac] #241574
12/18/11 04:20 PM
12/18/11 04:20 PM
Joined: Nov 2005
Posts: 96
C
Carl Offline
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Carl  Offline
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C
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Posts: 96

Looks like David and Mike K ON THE n carbon 20 and JC on the Marstrom were pretty evenly matched ,--perhaps this is the basis for the F 20 class ?

Carl

Re: Open 20 rule set: 1 October 2011 [Re: Carl] #241575
12/18/11 07:26 PM
12/18/11 07:26 PM
Joined: Jun 2002
Posts: 806
Toronto, Ontario
pitchpoledave Offline
old hand
pitchpoledave  Offline
old hand
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Posts: 806
Toronto, Ontario
yes good idea. But which M20 will be the class legal one?

Re: Open 20 rule set: 1 October 2011 [Re: pitchpoledave] #241613
12/19/11 12:20 PM
12/19/11 12:20 PM
Joined: Jul 2001
Posts: 744
Bob_Curry Offline
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Bob_Curry  Offline
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Boys,

It's a 8.5 beam class. No F20C of M20s. It is what it is.

wink


"The election is over, the talking is done, Your party lost, my party won. So let us be friends, let arguments pass, I’ll hug my elephant, you kiss you’re a $$.”
Liberalism = A brain eating amoeba & a failed political ideology of the 20th century!
Re: Open 20 rule set: 1 October 2011 [Re: Capt_Cardiac] #241746
12/20/11 08:56 PM
12/20/11 08:56 PM
Joined: Jul 2005
Posts: 267
Ocean Springs, MS
Capt_Cardiac Offline OP
enthusiast
Capt_Cardiac  Offline OP
enthusiast
Joined: Jul 2005
Posts: 267
Ocean Springs, MS
The Nacra F20na fits nicely into the class. smile


Capt Cardiac
Ocean Springs Yacht Club
Sailor
Nacra20 - Flight of Ideas #5
Re: Open 20 rule set: 1 October 2011 [Re: Capt_Cardiac] #249409
06/10/12 07:04 AM
06/10/12 07:04 AM
Joined: Aug 2011
Posts: 773
Greenville SC
bacho Offline
old hand
bacho  Offline
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Greenville SC
So what number is this class racing at?

Re: Open 20 rule set: 1 October 2011 [Re: bacho] #249412
06/10/12 08:25 AM
06/10/12 08:25 AM
Joined: Dec 2006
Posts: 2,490
On the Water
P.M. Offline
Pooh-Bah
P.M.  Offline
Pooh-Bah
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Posts: 2,490
On the Water
Originally Posted by bacho
So what number is this class racing at?

You had to ask . . .



59.3



Philip
USA #1006
Re: Open 20 rule set: 1 October 2011 [Re: P.M.] #249413
06/10/12 09:09 AM
06/10/12 09:09 AM
Joined: Aug 2011
Posts: 773
Greenville SC
bacho Offline
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bacho  Offline
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Posts: 773
Greenville SC
So if its currently the same rating as the Nacra 20 I guess the Nacra 20 and Open 20 are still racing roughly equal despite sail updates? Is there any other modifications other than sails being used currently?

Re: Open 20 rule set: 1 October 2011 [Re: Bob_Curry] #249487
06/12/12 02:23 PM
06/12/12 02:23 PM
Joined: Jun 2012
Posts: 2
G
GLS Offline
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GLS  Offline
stranger
G
Joined: Jun 2012
Posts: 2
Picture of a new F20na in USA

[Linked Image]



Re: Open 20 rule set: 1 October 2011 [Re: bacho] #249806
06/19/12 05:15 PM
06/19/12 05:15 PM
Joined: May 2004
Posts: 1,387
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Ventucky Red Offline
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Ventucky Red  Offline
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Posts: 1,387
Originally Posted by bacho
So if its currently the same rating as the Nacra 20 I guess the Nacra 20 and Open 20 are still racing roughly equal despite sail updates? Is there any other modifications other than sails being used currently?


What modifications are being done to the Inter/NACRA 20 sails for the Open 20 class.. Are they bigger than what came stock?

Originally Posted by Capt_Cardiac
The Nacra F20na fits nicely into the class. smile


Is that going to be rated at 59.3 too if the skipper enters it in the Open 20 Class?

Last edited by Ventucky Red; 06/19/12 05:17 PM.
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