ronan.stack@gmail.com

Members
  • Content count

    291
  • Joined

  • Last visited

Community Reputation

0 Neutral

About ronan.stack@gmail.com

  • Rank
    Anarchist

Profile Information

  • Location
    Ireland
  • Interests
    -

Recent Profile Visitors

2,609 profile views
  1. ronan.stack@gmail.com

    Adam 10m

    Hi Jono nice to hear from you again. SG is doing well being carefully cared for as always. When are you coming over for to Ireland to guest helm for us, bring Kevin Dibley with you also!! IRC is a very fickle game and we have spent over 15 years optimizing different boats for it with my friends. We have a very good understanding now of what changes work. Issue is SG will never be IRC friendly we have gone form 1.045 to 1.008 in 3 years without giving up much performance but still loose to J109s A35 JPK 10.8 etc by about 3-4 min even in a perfect race with zero tactical errors etc, the J109s all rate close to SG current rating so at least we no longer give them time. They are just too fast upwind against our 8M water line. Downwind we own them but passing lanes are few and they fight always. Regarding your points.. Moving mast back increases fore triangle so will result in a lower rating as the head sails will be lower % but if you go back and put a 100-105% head sail on it will in fact increase again as that new head sail is larger. We have a power head North 3DI main and a full square top main also. The power head is better, its also a reduced main size so the E measurement and mid/top girth measurements also reduced this took 10 point off our rating this year. (Also note some sport bats got a 5 point general reduction this year from the RORC to make them more competitive (Farr 280 MUMM 30 FE28 ETC) us included, to bring us to 1.020 from 1.025) Moving the mast back the STL pole length will increase if this is done as it measures from mast face so an increase there. Shortening prod after doing it will only bring that measurement back to where it was or if shortening beyond old STL then only a very minor change of about 1-2 points. Weight out of the bulb and into the hull I agree with less drag but IRC wont reduce much maybe 1-2 points as overall weight is the same and cost is high for such a change. Upwind it wont help really were hitting max displacement speeds already upwind and off the wind speed is never an issue. Its also expensive. Interior is fully fitted out with small galley and 4 cushioned berths but unless you have a toilet plumbed permanently then RORC wont give it a cruiser racer status. FYI cruiser racer status is worth a 20 point reduction on this size boat immediately so best idea is to install a toilet which is madness but that is IRC for you and this is why I hate the rating it should be about sails, foil, rig and hull not the head! Funny thing is if we installed a toilet and made the changes as above it could add up to a 24 point reduction and probably very little change to the performance and would bring us down into class 2 so it could be a winner for us against a completely different type of boat but our main interest with SG is the mixed sport boat classes annually which have no band so any reduction would be great. Apart form maybe a carbon fiber IRC endorsed shitter I dont think I'm going to make any more changes she just doesn't have the Water line to beat the class 1 lead mines. Even stranger IRC could refuse to endorse a cruiser racer reclassification and resulting hull factor change even with a new toilet unless we can prove we have a need for it, happily our trimmer has IBS and is always asking when it being installed!!!
  2. ronan.stack@gmail.com

    Adam 10m

    Thank you all for the input. PIty we don't seem to know how they go against J109s. With a rating of 1.010 the A10 is approx same rating but gives up the water line of the J109 so I would guess upwind they cant keep in touch. A10 should beat them downwind in W/L with the huge symmetric but would have its work cut out in any Olympic triangle or mark course on tight reaches against he Assymetric kites on the J109. As with all results even if we had some against J109s you will never know if the crews on each boat were pro or not prepared at all so unless someone is in a club with a good spectrum of J109s A35 etc racing against a few A10s its hard to know how they would perform without that first hand knowledge. From the UK boat "Boomerang" I see its can beat J105s in club level but no J109 info to date. On s seperate note: Why is it that most Aussie club and regatta result never note boat type only name and sail number? have to go searching each name and sail no to find out manufacturer or maybe that the whole idea?
  3. ronan.stack@gmail.com

    Adam 10m

    Thanks Everyone great info and discussions! Pulpit, I guess the question is really "what does it rate" and how do either boat do against J109s which dominate IRC racing in class 1 Ireland. If it can compete against a J109 my idea is a runner if not then back to the drawing board or I may as well just start looking a a J109. Rating needs to be above 1.000 to even make it into class 1 in most Irish competitions. Minch I see the results thanks for the link but not sure they are IRC based races?
  4. ronan.stack@gmail.com

    Adam 10m

    All thanks for the great info and number of responses much appreciated. Savoir do they still make new A10 hulls in OZ do you know of anyone who i can contact? I have a designer I would like to work with to place more efficient yet same shape more or less rudder and keel on her and then transplant my existing carbon Southern Spar rig onto her using my current sail plan including short Assy pole for A sails. Assuming chain plate locations are or can be modified to same position. In effect I keep my sport boat but can transfer everything to the IRC optimised A10 for IRC racing. Two boats in one. Also plan would be to fit out down below with head, light weight bunks and galley to meet IRC cruiser racer and gain a better hull factor. I'm liking the water line length as most IRC winning boats in our class are longer ( think J109 JPK 10.8 Arc A35) and get to windward faster being a rocket down wind just doesn't help as the legs are never long enough and passing lanes narrow. What are the hulls usually made of? wondering if a neglected hull could be bought for little cash and reused but all depends on water ingress and osmosis. I completely rebuilt my Dibley 8M 3 years ago so not afraid to get the hands dirty and love older boats that were well ahead of their time.
  5. ronan.stack@gmail.com

    Adam 10m

    Gorn that is a sweet looking A10 but wonder what the mods have done to her IRC rating (if she even has one) and can she still meet cruiser racer status or only racer status, note it is worth a lot of points to remain cruiser racer by way of example a 1720 sport boat rates 1.019 but one with a few bunks and toilet and cooker rates .989. Would love to get something rarely seen in Europe and do some damage against the established IRC favorable boats. Shipping fees etc wouldnt be too bad I have good links in that department and plenty of family all over OZ to store her until I arrange something cheap (and an OZ passport of my own). Now import duty to Ireland could be painful!!
  6. ronan.stack@gmail.com

    Adam 10m

    Savoir thanks for the info much appreciate if you know of any owners on here would be great to be able to contact them. Do many of the boats race mixed IRC or is that only once or twice a year? Any J109s in the area also?
  7. ronan.stack@gmail.com

    Adam 10m

    Hi all trying to get some info on Adam 10m boats. I’m seriously contemplating buying one to optimize for IRC racing in Europe mainly Ireland and UK. I hear rumors they are great IRC boats any info on ratings and how the race against J109s Arch A34 and similar would be great. Our alternate plan is maybe to build one using same hull design and apendage shapes but update foil cross sections etc and take the hit for age allowance but efficiency could overcome this. We have a carbon rig available to drop into it also from my current boat and new sails etc maybe put a small prod and masthead A sails. Crazy idea but why try design a IRC perfect boat when allegedly the A10 already hits the sweet spot with its design. Any info much appreciated as above really want to know can it compete against J109s and what ratings they have in Oz I see 1.010 seems to be average under IRC but the online results tend to be all one design class. cheers.
  8. ronan.stack@gmail.com

    Looking for Krazy Bull

    Would love to put the kiwi hurt on the local fleets but kiwi and IRC are like oil and water they just don’t mix well. Still pelting downwind at crazy speeds make me think who cares about IRC it’s kiwi speed all the way for us!!!..search Facebook ‘supergroove fl technics’ for the latest videos. Go the Groove!! still would like a blast on a bull 7000 though articulated prod looks cool!!
  9. ronan.stack@gmail.com

    Looking for Krazy Bull

    There’s a bull 7000 in Lithuania of all places on a lake in Trakai found it there while on business last year, amazed to see one on a relatively small shallow lake. looked in reasonable condition. http://www.sailingnetworks.com/boats/view/21678
  10. ronan.stack@gmail.com

    Dibley K250 Carbon

    JL92S i would love to but its a bit far to go every weekend or two from Ireland even if the boat was left there getting crew over would be painful.
  11. ronan.stack@gmail.com

    Dibley K250 Carbon

    Hi All so I have decided to keep Supergroove, why should having a baby in the family stop me from flying down wind at 20Kts, Whats the worst that could happen! Big hello to Kevin. For those of you not familiar with Supergroove we received a huge amount of support and advice from a multitude of people that have owned,raced or built Supergroove during the last 22 years.. Amazing that she is 22 years old now but Kevin in particular supplied us with a wealth of info and we are truly thankful for his advice. It was also special to be rebuilding a boat with so much history . On the dis-masting of Carbon I would bet it was related to minor part wear or failure. It amazes me how little maintenance people put into mast especially considering the replacement cost and insurance rules if you lose one racing. We religiously fully break down our Southern Spar Carbon rig (built 2008) and clean/re lubricate each year with tufgel and coat all fittings with duralac. Usually we find a helicoil or screw that need some work/replacement. Not many people go to that extent of disassembling them but I was frightened by the replacement cost. In 2015 the wear and tear on the mast was very extreme as she wasn't maintained at all by previous owner so we know how quickly they can deteriorate when not maintained properly. Re,member carbon and Aluminium hate each other so corrosion can be very quick if the films between fittings are not sound. I can just imagine going from 20Kts to stop will quickly locate the weak point in a mast. We have no back stay and have been out in 37 Kts with no issues structurally. So with the plan to keep the boat we have secured two major sponsors who have supplied us with all new sails including new North 3Di for 2018 and we are looking forward to next years campaign at Cork week/possibly Cowes etc. Now if we can only beat those damn pesky 1720s we would be winning sport boat classes but they are very well set up and seem to fit into the IRC system very well for handicap. Roll on 2018 boats on the dry now for winter maintenance. Anyone who would like to go for a burn with us we are in Ireland so get in touch if you here between April to October each year when she is in the water. Picture below form 2017 DL regatta in Dublin vs what she looked like in 2015 when purchased
  12. A quick shout out to anyone in Europe interested in DunLaoighaire week mixed sport boat class. Race committee has allowed for first time a mixed sport boat class but we need as many entries before Christmas or it will be dropped... maybe some of our European (U.K. France Italy etc) neighbours are interested in a few days sailing and drinking in Ireland. Details here http://www.dlregatta.org/ July 6th to 9th IRC rating used and strict D/L requirements to keep racing close. Expected boats J80 J70 1720 backmans dibley melges 24 etc. Help make this a bi-annual class event!!!