IOMICA Forum

The class rules require the boat to be weighed dry. This makes it awkward to event measure after the start of the first heat. So what about the following? C.4.2(b) The weight of boat in wet condition excluding wind indicator if used, having been held vertically and drained for 30 seconds ..............

I'd like to try and pull together this valuable discussion on event and fundamental measurement, so we can see the issues that the Measurement Sub-Committee might be asked to look at. The way the class rules are arranged at the moment is just one out of a number of possibilities. Some classes do thi...

Under the pre[vious ...] class rule we had a certificated boat which fully complied with the rule I think what we had was a boat which complied with the rules at the time of its measurement. By the time an event came around, many of us had made changes which made us cheats. Not because the boat no ...

... without the approach adopted by my club, described above, I could have raced without these from the time of fundamental measurement until the boat was first event measured Ken, You could have in theory, but you wouldn't have in reality, because you know that it is your responsibility to race a ...

what I meant was that it makes zero sense to issue a certificate to a boat which may not comply with the Conditions for Racing. I'm still struggling a little here. The certificate explicitly does not cover Conditions for Racing. I think we know that, and I don't think anyone now imagines otherwise....

Henry Farley wrote:Anyone interested in scoring HMS might find the following link of interest.

Thanks Henry. We'll be using it, I understand, at the 2004 UK IOM Nationals. I also understand it has been well used at the 2003 Nationals, and various ranking and regional events in the UK.

HOW can I as a measurer satisfie myself (and anyone else) that a yacht is LEGAL as far as the rules are concerned if I DO NOT Weigh it Hi Maurice If you want to know that the boat weights 4.0 kg or more, then you have to weigh it. No contest! But I think the question is, are you being asked to sati...

It makes zero sense to issue a certificate in respect of a boat which may or may not comply with the class rules Ken, Quite a strong statement. It does indeed make zero sense to issue a certificate to a boat which may not comply with the rules. Fortunately, this is not what happens. The certificate...

You can move or change the jib counterweight, in my unofficial opinion, so long as the boat weight does not fall below 4 kg. Yes, Lester. After you pointed out Appendix E (I've read it many times before, but not in a while) I decided to brush up on that section. As stated in E4.7(c) "the position o...

Hi IOMers A new computer virus has spread to our community. As far as I can tell, it first entered our community through systems in AUS and NZL. (Nothing personal guys!) Our old Yahoo! IOM discussion board has come under attack, as has this site, and a number of individuals have had infected e-mails...

Anyone moving a battery pack more than a few centimeters after event measurement would in my opinion be breaking the rules. [...] Iguess if there's no event measurement (as per your average club or even regional race) then, yes, you may well be able to change wts around. Is this OK? Erm, not OK rea...

One of the reasons to be interested in what the rules say about the movement of weight in the IOM is that, as Steve and others have noted, in light airs it might be an advantage to have the boat trimmed nose-down and the transom lifted out of the water, while in heavy airs the reverse might be bette...

C.7.3 ADDED WEIGHTS(a) Weights may be positioned in and/or on a mast spar below the lower point. (b) Such weights may be removed or added at any time subject to C.4.1 and C.4.2. There was a potential conflict between E.4.7 (you can't move or change ballast) and the fact that an IOM rig typically ha...

Ken Dobbie wrote:... if the weight and position of the correctors is not required to be stated on the certificate ...

Recording this kind of detail on the certificate is something that is common in full-size, I understand, and for good reasons. Do we want to go down this route for the IOM class?

any rule [...] must result in a craft that is inspectable in a non-destructive manner using normal tools that a measurer could be expected to have available. Ralph is saying that conformance to a rule must be able to be verified, and this is a widely-held point of view. Ralph adds that, for the IOM...

It might be worth pausing to see what kinds of measurement and measurers we have according to the Equipment Rules of Sailing. C.4 MEASUREMENT AND MEASURERS C.4.1 Fundamental Measurement: Measurement required to ensure compliance with the class rules. C.4.2 Event Measurement: Measurement carried out ...

I'd prefer allowing sailmakers to attain certification differently Hi Rob What is this different way? Another weakness of the draft scheme I see involves event measurement How would you arrange for the quality control of self-certified sails without event measurement? skippers with certified sails ...

I understand that the draft document is still under discussion within the Measurement Sub-Committee. There are questions about how far a production sail can deviate from its licensed pattern before it cannot be self-certified. I expect the MSC will release the document for consultation in the near f...

Can hull corrector weights be moved to a new fixed location after measurement without voiding the certificate? Hi EKE My unofficial opinion is to note that C.4.3 is in section C of the rules -- ie it specifies the condition of the boat at an event, and does not specify something that is measured at...

The ISAF-RSD hold their annual Permanent Committee meeting this weekend in London, details downloadable from http://www.radiosailing.org/minutes.html. The IOMICA Annual Report to RSD may also be downloaded from this link. The report will shortly also be posted to the IOMICA Web site.

My own understanding of CHECKSTAYS is that they are attached below the lower mast band [...] They are only allowed in the absence of a mast ram Hi Ian My unofficial opinion is that the mast band is not involved in the location or definition of an IOM checkstay. Yes, checkstays only allowed if there...

Without proof of waterline, it will be difficult, if not impossible to use a jig to verify total draft. Certainly, it would be more or less impossible to have a simple draught gauge, as per the M rules, yield the same draught measurement as a flotation tank for all possible designs. The Internation...

Hi Herb Speaking personally, I think this is an excellent idea. The International Marblehead class already has a "water-free" device it calls a "draft restriction gauge". Details from the PDF file of the Marblehead class rules, downloadable from the ISAF-RSD Web site, http://www.radiosailing.org/pdf...

There are three often-mentioned issues for the IOM class rules. Steve has mentioned the first two in the "sail shape indicator stripe" topic, and there is a third: Does it affect performance? Can its legality be proven or checked? Is it cheap and/or simple? The goal for a "one-design class" does not...

Now how would you prove that? This is another deep question for any set of class rules! Should class rules only ever specify things which can be proven? Or should they specify whatever they like in the interests of trying to set up a certain desirable "sailing game", and leave it up to the rule-exp...

maybe we should ... ask ourselves "does color really change performance["] This is a particularly important question, of the sort that regularly pops up in discussion of the IOM class rules. That is, does some feature X of the boat affect performance? In this case, and many others like it, I'm pret...

If one were to take it as far as which color the 35 micron material is, one would also expect to make sure it came from the same manufacturing batch Hi Steve It gets worse :twisted: "G.3.1 (a) (2) The body of the sail shall consist of the same {sheet of sail material} throughout". Does this mean it...

I would be more concerned with the interpretation of same ply when applied to the primary and secondary reinforcement where just about every sail seen has woven Dacron (or similar) for this on Polyester film panel sails Hi Roy There is no requirement for primary or secondary reinforcement to be "of...

Well, here is the ERS definition. G.1.3 Ply: A sheet of sail material. Then, if we put this into the class rule, we get: G.3.1 (a) (2) The body of the sail shall consist of the same {sheet of sail material} throughout Does this mean that a sheet of blue material is different from a sheet of white ma...

Here's a spanner in the works - can not the person use different coloured sail cloth between panels. i.e top panel white, second dark blue, 3rd white, bottom dark blue as long as the material complies with G.3.1 (a) (1) Chris, it is G.3.1(a)(2) that would worry me. G.3.1 (a) (1) The construction sh...