IRC RATING

  • 24 May 2015 13:09
    Reply # 3353916 on 3342753

    49 nautical miles in 9 hours. 2 first hours in shifting conditiones. Last year I made the trip in 7 hours and 15 minutes, but that was in ideal conditiones all the way With one panel Down, and an inshore sail a bit less frantic. Surfing along in 10+ knots is quite hilarious.

     

     

    Ketil 

  • 24 May 2015 08:11
    Reply # 3353817 on 3342753
    Ketil, Your 9 hours sailing in a reach home voyage must be quite fun! May I know your average speed? John
  • 22 May 2015 13:57
    Reply # 3352162 on 3342753

    Hi,

    My NOR rating is 0,911 fully crewed, and 0,9011 shorthanded. A normal rating for an X-99 is 0,978 fully crewed. I could not get the rating for a BM rigged X-99 shorthanded.

    The rating for the BR rigged fully crewed X-99 is hard to sail fast enough to win.  To find the differences, you multiply the sailing time With the rating. Sailing for an hour, I would get the finishing time 54.066 minutes, while the fully crewed standard boat would get 58,68 minutes. To beat me, they would need to sail 9% faster than me, wich is easy enough sailing headwind/ downwind (With spinnaker). Without a spinnaker, or With some reacing, they would have a hard time beating me to the finishing line. The last race lasted 7,5 hours and I was fit as a fiddle, while the others expressed feelings of fatigue. Adding to that, I had to beat to the racing track, 2 days sail, 15 hr total, and Reach home in a 20 knots Wind in 9 hours at the age of 69 years With little wear and tear thanks to the genious Chineese rig.

    Regards

    Ketil Greve   

  • 22 May 2015 09:42
    Reply # 3352061 on 3342753
    Anonymous member (Administrator)

    John,

    I took these photos of the new sail for Ketil’s X99, Marie G, three weeks ago. As can be seen, it has been made with cambered panels (sailmaker www.tuchwerkstatt.de ).

    I drew up a sailplan for him, based on a master sail with AR=2.00.

    Arne

  • 21 May 2015 23:44
    Reply # 3351743 on 3342753
    Interesting experience from Ketil. Can you tell me the IRC rating and sail area of your X99 in BR and JR? Are you using a JR sail with camber cut? John
    Last modified: 21 May 2015 23:50 | Anonymous member
  • 17 May 2015 15:51
    Reply # 3346306 on 3342753

    Getting rating on Marie G was time consuming as the Norwegian sailing cummunity changed from the Swedish LYS to the IRC system. The X-99 hull is very well known, but putting  a Junkrig on, is rather unheard of. They tend to use the data for cat rigged boats, and I am fairly sure the the junkrig outperforms a cat rigged boat, especially on a Reach where the sail twists much less. I am back from a regatta, short and single handed With a second Place in the singlehanders brigade. The race was a out and back race With no reaching (where junkrigs exell), so I am quite pleased.

    Regards

    Ketil 

  • 14 May 2015 11:33
    Reply # 3343218 on 3342753

    I am far from an expert, however I can tell you what little I know.

     

    Lexia has an IRC rating which was required to enter the OSTAR (2009 and 2013) and the AZAB (2011). 

     

    Fortunately a Sunbird 32 junk rigged schooner had been registered for IRC previously and so it was just a matter of providing details of any changes, eg a feathering prop when fitted.  (I would imagine that it might be more difficult to start from scratch with a model that had never previously been IRC rated.) 

     

    According to the IRC, Lexia is getting slower with age - just like her owner!    Indeed the AZAB gave me a trophy, apparently for going slowly, rather like a slow bicycle race. 

     

    As regards sail area - the sail area is the sail area of the junk rig sails as per the sail plan.   And the junk rig is rated or entered as being without spinnaker. 

     

    The only possible point of contention was that IRC insisted on recording the junk rig as a "Cat Ketch", presumably because that was the nearest description in the list on their computer system.  I didn't bother to argue. 

     

    On the few dealings that I had with the IRC Rating Office they were very helpful.   

  • 14 May 2015 00:06
    Message # 3342753
    Can JR boat obtain IRC rating to race against BR boats? How to determine the sail area of JR? Should it be the same as the main sail+spinnaker in the original BR sail plan? John Kwong
       " ...there is nothing - absolutely nothing - half so much worth doing as simply messing about in junk-rigged boats" 
                                                               - the Chinese Water Rat

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