Another query

[Don Case]

I have to admitt that this is a little picky but, Section C says that it's rules are in effect while racing. Does this rule not limit the amount of backstay tension(based on boom stiffness)

C.7.5 BOOMS
DIMENSIONS
minimum maximum
Boom spar curvature measured between points on
the top of the spar 10 mm from each end ................................ ......... 3 mm

Should this rule be in Section F?

This won't become a habit
Don

[Andy Stevenson]

Hi Don,

While the rule is in force during an event, measurement isn't taken on the water

No external pressure shall be applied to a spar when measuring unless specifically prescribed.

I read this to mean untesioned.

Cheers

[Don Case]

Thanks Andy, I forgot the ERS again. Sometimes it seems like you have to read every rule just to see if it applies to your situation. It would be nice if there was some kind of search engine. I guess there is, it's called the "Rules" section of the IOMICA Forum.
Don

[jandejmo]

Hi Don


A few comments:

Class rule C.7.5: "Boom spar curvature measured between points on the top of the spar 10 mm from each end ..."

Class rule A.5.2: "... when a term is printed in “bold” the definition in the ERS applies." So there is a sort of a "search engine" built into the class rules.

ERS F.3.3(b) defines how boom spar curvature shall be measured. The definition ends with: "... when the spar is resting on one side". Clearly that will not be the case when racing.

Boom spar curvature is to regulate "permanent set" and that is why the spar shall be resting on one side with the measurement not influenced by gravity or other forces. ERS H.4.3 also applies as pointed out by Andy Stevenson.

The reason that a boom curvature rule is placed in Section C of class rules is that the curvature may increase over time. Although a boom may bend under load during a race it does not necessarily mean that the boom spar curvature - the permanent set - will increase.

However, I agree that the relation between the class rule and the ERS definition is not obvious. I will raise the issue with the ISAF ERS Working Party and with the chairman of the ISAF Class Rules Sub-committee to see if we can improve on the wordings.

Many thanks for raising the issue!


Best regards

Jan Dejmo

[Bruce Andersen]

I wonder if this request shouldn't be sent from IOMICA to RSD rather than from an individual owner straight to ISAF? Organizational schemata only work when used properly.

[jandejmo]

Hi Bruce

I think the IOM class rules are ok as they are and that an IOMICA request is not needed, but Don Case raised an issue that could help to improve on the ISAF Standard Class Rules and the ISAF Equipment Rules of Sailing.

An issue that I, as chairman of the ISAF ERS Working Party, intend to discuss with the WP to see if we could come up with an amendment for the 2013-2016 ERS. As member of the ISAF Class Rules Sub-committee I also intend to discuss it with the chairman of that committee. If there will be a new ISAF Standard Class Rules wording for a boom spar curvature rule, then IOMICA can use it for the IOM class rules.


Regards

Jan

[Don Case]

Sorry, I didn't mean to start something. This section of the rules says it all

A.5.2 Except where used in headings, when a term is printed in “bold” the definition
in the ERS applies and when a term is printed in “italics” the definition in the
RRS applies.

If I had looked a little deeper and if my memory was a little better(I had heard before that bold meant look in the ERS) I never would have had to ask this question. I think everything is there, sometimes you have to dig deep.
Don

[jandejmo]

Hi Don


Your question may well lead to more clear ISAF rules and in turn to easier to understand IOM class rules. Absolutely no reason for you to say "sorry"!


Best regards

Jan