IOMICA Forum

Vang on the Viss was and is legal.
Now there is a discussion about whether someone can be made bigger or if we need to limit it.

The Porter one was not a vang, it was and still is a vang fitting. It was not legal at the start and later became legal with a size limit.

Cool design

Should be OK now, now that multiple attachment points are allowed.

Hi All Correct me if I’m wrong, but 10 years ago the standard gooseneck fitting was roughly 3×3 mm × 2 screws (one at top, one at bottom), which gives about 20 mm² total. Later, the allowed size was 2000 mm². If we apply the same ratio today, a vang starting at 500 mm² would scale up to 50,000 mm², ...

Hi All

Actually, the vang black plastic body shown in my previous post has a surface area of about 730 sq mm. When you add the rotating gooseneck, vang–boom fitting and the main boom fitting, the total exposed area comes to roughly 3000 sq mm.
Regards Zvonko

Dear All Projected Area – Clarification Question I have the same as Brad clarification question regarding projected surface area. When the Mainsail Boom Vang fitting (F.4.3(a)(3)) overlaps with the boom—as shown in the attached picture—should that overlapping area also be included in the projected s...

Hi All Regarding production, in my case, it is easier to manufacture a VISS vang than a standard wire with a threaded adjuster. For the VISS vang, you need 2D laser cutting ( or it all can even be cut by hand ), plus a small amount of epoxy and carbon fiber. For the wire-and-threaded-adjuster soluti...

Zvonko's suggestion of a 20mm x 200mm vang (ring gauge size and total length) would certainly be easy to understand and stop surface area growth. I would suggest that a 200mm length is around 50mm too much - but negotiation on size can come after agreement on the principle. Just for info, this is f...

Dear The surface area of the Viss Vang is 1739 sq mm, and can be seen at the following link: https://www.iomclass.org/phpBB3/viewtopic.php?f=7&t=2111 This is a comparison with a vang that has been on the market for a long time, so I assume that it does not violate Rule F.2.3, and that our solution i...

Hi Tony, At the moment there is no limit in either length or height. With the proposals, we’ll at least get a height limit. If you also want a length limit (which I personally think is unnecessary), you’re welcome to make a proposal for the next AGM. I don’t understand the logic — better to have no ...

Hi Tony, No problem at all — I know you won’t be voting for the CRO proposal, and that’s perfectly fine. We’ll just have to wait and see what others decide. You’re a bit mistaken about the height of my rigs, though. They’re actually the same, or even slightly higher, than on most of the newer boats ...

Hi

I would open the jib sheet about 5 mm more and increase the jib foot depth to around 35 mm. I’d also make the mainsail a bit fuller in the upper part — as much as possible to still look well-shaped and can tack properly in light winds.


ZJ

Hi Tony, Thank you for sharing your perspective — but some of your statements deserve a bit of deconstruction, as they leave out key facts. First, you open by saying this situation “has become a complete mess,” yet you overlook a crucial point: this confusion was not created by IOMICA, but by IRSA. ...

So just to clarify — you’re okay with this (see picture): Untitled.jpg where the well is partially closed off by a plate (shown as solid) attached to and flush with the surrounding deck. This is from: https://www.iomclass.org/iom-questions-and-answers/ I’m wondering, what’s the purpose of that, and ...

Hi Olivier In 2024 there was no CRO NC submission on this subject, IOM ICA Exec voted following IOM Class Rule amendment which is valid from 12 February 2024: F.2.4 (e) Kicking strap shall be capable of passing through a 20 mm ring gauge. What was later voted for at the AGM by approx. 77% of IOMica ...

Regarding the CRO Resolution: CROsubmission_2025_IOM_ICA_AGM.docx.pdf The VISS kicking strap is capable of passing through a 20 mm ring gauge, confirming that it remains within the dimensional limits defined by the CRO Resolution. Its slightly curved shape was intentionally designed to follow the co...

Lester wrote: ↑

03 Dec 2020, 12:29

But the real question remains unclear. I'd like to invite you to reply with a simple Yes or No, and if you really must, a Maybe (!):

Shall cellular structures be permitted in a hull made from thermoplastic?

Many thanks!

No

Zvonko Jelacic CRO 35

Hi John 1. How will points carry over from Part A to part B - it should be spelled out In the file is written - RRS Appendix A Low Point Scoring system shall apply for all races (qualifying and finals) You carry all the races in finals and you can discard what is best for you (A (gold) fleet will pr...

Dear Friends At World Championship in Pierrelatte, some of you had questions about SHRS scoring system while we were waiting for the protests, so my idea is to put all the answers and future questions here. 1. Do all competitors sails to the end of the championship? Yes, at 50% - 60% of the champion...

SOLD

Kantun S modified FOR SALE

It is my personal boat with I have won Croatian Championship.
Boat is less than 6 months old and has wider stern then standard.

It can go with or without rigs or electronic
Possible to bring it at EC Vitoria if needed.

zvonko.jelacic@gmail.com

Hi Everyone First I would like to say this topic is for discussion of Simple Heat Racing System (SHRS) not how to improve current Heat Management System (HMS) for that please open new topic. In my mind I like SHRS because 3 things. 1. You need to sails for win every race, and they all count plus rac...

SOLD

Dear, It is Marko Matic boat CRO 4 that have finished 2nd in last WC. Possible to give it just after FRA NC since I will plan to sail with in on that race. Boat, fin, bulb, rudder, three rigs and rig box 2300EUR All electronic also possible to buy price as new -10% see price on my web site: http://w...

Boat is SOLD

Few images

Available after EC

FRAKTAL CRO 85 molded by sailsetc finis by me and will be sailed by Marko Matic at EC

All thee rigs included

Price is 2200EUR

SOLD

Hi All

Price went down to 900 EUR + Shipping and packing

Hi All

My Pikanto one year old is for sale:

RC Compartment: Option A
Hull Color: Anchosa_Blue
Fin & Rudder : Ultralite-radioyachting

Hull is scratch on one side.


Price: 1050EUR + Packing and shipping ( 40EUR + cca 60EUR)

E-mail: zvonko.jelacic@gmail.com

Regards
Zvonko Jelačić

Hi all If informed input from the class members is desired, it would seem valuable to make the different 2013 bids available for everyone to see and comment on before a decision is made rather than after... In actual fact why not just post the bids so everyone can have a gander and help you and the ...