J/30 Class Association Forums J/30 Forum One Design Class Rules Class Rules & #1 Genoa Size Limits

What are the standard measurements in feet, for the luff and foot of the main? Thanks

From the Class Rules. These are the only specified dimensions in paragraphs 5.12.2.2, 5.12.2.3 and 5.12.2.4. The luff and foot are implied by geometry. Para 5.10.2 has the measurement band on the outer end of the boom at 13 feet. Refer to the ISAF Sail Measurement Guide on how to interpret.

Mid Point Leach to Luff 2621mm which converts to 8 Ft 7.2 in

Leach 12395mm which converts to 40 Ft 8.0 in

Max Headboard Extended from Mast 158mm which converts to 6.2 in

If you look at the J/30 Mast drawing at the bottom of the J/30 Specifications the distance between the upper and lower measurement band on the mast (P dimension) is 11582mm which converts to 38 ft

There certainly has been a lot of discussion with regard to the J-30 ODR modifications to keep the boat relevant with regard to improved technology in sail materials, and to be more competitive in PHRF. Does anyone remember when you could go to any number of sailmakers and they would list J-30 in their pricing packages for ODR sails? I have noticed that the J-30 has been dropped from virtually all the sailmaker websites that list OD boats, the sole exception is Doyle. Should that tell us something?
With the exception of 2 or 3 areas which around the country J-30 ODR seems to have greatly diminished. Of the 500 or so J-30s built how many race PHRF on a routine basis vs ODR?
If you are sailboat racer you want to win; racing in a configuration(ODR) that generates rating penalty certainly doesn't help. Should we consider modifying the ODR to align to PHRF (155%, J length pole& spinnaker, sail materials?) Early on the ODR rule has a 170% as the Genoa, it was changed to a 163%, we have modified the materials for the head sails from Dacron to laminates. Should we consider moving the ODR to adapt to PHRF? It could enhance the participation in PHRF and J-30 one design racing.

LUMPY

I can never bring myself to support rules that make a boat theoretically slower. Our boats like a lot of sail. If some want to PHRF optimize, go for it but I say keep the sail sizes as is for ODR. The evolution of sail materials is another matter.

The #1 used to be a 170 and was changed to the 163. Theoretically that made the boat slower. Asymmetricals will theoretically make the boat faster. I am suggesting that the class rules should be looked at to reflect the reality of what configurations people are using, and not make the ODR irrelevant to the majority of J-30 owners. This could help increase participation in J-30 racing.

Lumpy,

If the class were to adopt PHRF standards... allow any material in any sail, use J length pole and chute, make the #1 a 155, would you have any more J/30s coming out to race in Charlotte, or Key West? Would you travel to Annapolis, New Orleans, Long Island Sound, or Narraganset bay for the North Americans?

Dennis poses a very valid question. I initiated this thread in 2008 and have read a number of comments on the potential merits and pitfalls of the change originally posed as a question.

I know of only one boat (Wildcat) that has demonstrated the commitment to travel to regattas out of area, but has elected not to do so because of the OD restrictions differing from what he normally sails with PHRF.

I guess it is fair to ask - what boats out there have not participated in a OD event because they have elected to optimize sails for their local PHRF rules? I'd really like to hear some specifics and learn who is willing to make the commitment to attend a OD event (e.g. travel to a location that races OD) if the class rules accommodated the PHRF sails they have (e.g. Genoa size).

Are the OD rules really keeping boats away? Inquiring minds want to know. Please post some specifics with facts.

I will not be participating in NB OD events this summer because I am converting 526 to roller and the sails I use on 505 down here in PHRF racing. If I do sign up for an OD race, I will be using the PHRF 155 setup. You guys will have to figure out if that is a workable option to get five boats on line for a OD start ... option being that I just do the PHRF races. It could be interesting to see if an overpowered OD is competitive with a roller in wind over 15.

Vic,

Challenge accepted. I just spoke to the SNE Fleet measurer and he agreed that for the SNE J/30 OD events on our 2011 schedule you will be allowed to use your 155 Genoa. There will be no rating adjustment and you will be scored boat on boat. Note that anyone can use a furler and still be OD compliant, so that isn't an issue.

Now to make this meaningful - It may be useful to collect some data. Lets check things like pointing, boat speed, etc. in comparison with the OD boats you are racing. Maybe save your GPS tracks and analyze data afterwards. You also have your flip cam that may be useful.

Time to sign up for all the SNE J/30 OD events!

Many years ago (when there still was a J/30 Class in the Chicago NOOD), one of the guys from Detroit brought his boat down. He only had a Kevlar 155, but we agreed that he'd sail level with the rest of us. I believe this was still before the class allowed kevlar, so we had a mylar class legal sail.

My observation was that in a straight line, he was probably just as fast as we were, but accelerating out of a tack, we were a tad better off. If memory serves, winds were 12-15ish, reasonably flat water.