irc rating 36i

[offshore]

Hi All

We have just had our boat "Bad Habits" weighed and measured for an IRC handicap. The handicap came out at .999 which is about 4Min's per 100 faster than we are currently sailing. We will have to practice a bit more. Interestingly the boat weighed in at 5810 kg after 18 months in the water. Thats only 97kg over the factory specs.

cheers
Barry

[krawall]

Unhappy to hear this. I was hoping you'd have a lower rating. Yet happy to hear this, means we have a fast boat (for its size).

I'm going thru the same procedure soon, but it gruels me to unload all that extra gear we stowed. For sure more than 97kg...

[offshore]

I think our sails may have hurt our rating a bit as we have a new main with a bit of roach and our genoa is 37.47square m. We are running a symmetrical kite of 84.13 square m on a 4.2m pole. Trolling the web shows boats with a rating from roughly .96 to 1.02. Our boat is a standard 1.94m keel not a performace like yours.
When they say they want the boat empty to weigh it, they really mean empty. We even had to take the fire extinguishers and the gas bottle off. It took a full day to unload every thing.
I would love to know your rating when you get it.

Barry

[mkremedy]

Barry,

Whick 36i do you have? is it the standard version or the performance version. Classic main or furling main. We have a performance version with a classic main.
Happy Sailing,
Remedy

[offshore]

Hi Remedy
It is the standard 36i with the standard keel and a classic mainsail. We have had new kevlar laminate main made that is bigger in area than the standard. This sail responds much more to trim adjustments and has improved our speed a lot. We also have a a range of Kevlar laminate headsails. With the No1 and full main up we have more sail area than the performance with the standard sails. One of the Biggest improvements with the new sails is that we can maintain much better speed when sailing hard on the breeze. We are probably pointing about 3-4 degrees higher.

Barry

[krawall]

HI Barry,

do you know the sqm of your new mainsail?

Thanks,

Tom

[offshore]

Hi Tom

Sorry but I don't know the exact size of the new sail. I will take a photo of it with the old sail sitting on top next week if you would like. The new sail does overlap the back stay which can be fairly annoying in light winds when tacking.

Barry

[krawall]

Barry

do you still have the values you filled into the IRC registration form? Would save me a lot of hassle.

If the roach does touch the backstay, then I guess it's a big sail as we have lots of clearance on ours

Tom

[krawall]

Our IRC cert just came back.

1.008

I don't know what went wrong here but it may be we went too big on our spinnakers. Our non-spinnaker rating is 0.987

Tom

[leecondell]

IRC penalises upwind sail area, but is lenient on down-wind to a point. To optimise you should reduce your headsail slightly to reduce the girth measurements (your sailmaker should be able to offer you advice on this), then fit a masthead sheave and carry a masthead spinnaker with the spinnaker pole or bow-pole length no more than 114% of your J measurement. The performance increase down-wind will more than make up for the increase in rating, while reducing your headsail will reduce rating and only effect performance in the lightest conditions. However, if you barberhaulers you can generate more drive in the headsail to make up for this by inducing depth in the headsail to 'power up' the yacht in the light. In my opinion the SO36i is too heavy for an assymetric spinnaker to be competitive under IRC in anything but the very lightest conditions.

[rhb]

Hi Lee - good to see you here. Do you happen to know IRC ratings (or AMS for that matter) for any SO 42I Performance boats?

[offshore]

Hi all

We reduced our number 1 headsail area by 1.5sqm and took some of the roach out of the mainsail and received a discount of .006 on our previous IRC number so we now rate .993 with kite and .980 without a kite. We always finish in the bottom third of the fleet in IRC even when we have a good day. Does anybody know of a 36i that is doing well under IRC or is the boat not competitive under this rule. My friends just tell me to sail faster.

Barry

[flightdeck]

Should have read this before I asked the question in the other forum re your new main.

The speed must have to do with that crab pot hanging of the rudder or maybe the SO36 just can't sail to it's IRC rating, I know you lot are working hard at it.

Speed....or lack off gets me too on our SO32, should have bought that X-35...............puhhh could have an SO32, house, Mercedes and a horse for the X-35 money.