I need to correct some of my statements in my earlier posting.
It has been brought to my attention that some statements of mine were incorrect. I rechecked the disputed points and indeed I was incorrect. I'm refering to the statements :
Interestingly enough. The F18 class and F20 also do not include the WHOLE mast area in their limits only the part that has a sail behind it.
This part appears to be incorrect.
The F18/F20 class rules only state that the mainsail area shall enclose the mast area. No further definitions are given. Later in the F18 rules it is said :
"The method of calculation of sail area shall be as defined in th 1999 formula 18 measurement form and measurement certificate."
I was assured today that the F18 measurement form does indeed define the WHOLE mast area times 0.5 is to be included in the overall mainsail area.
For me this is enough to accept the fact that I was in error earlier.
Source :
ftp://ftp2.f18-international.org/finterna/2003_F18_Class_rules.pdf2nd error :
we didn't want to cause a split between the surface area determined by the rating systems of Texel and ISAF (schrs) and the F16 class rules. A thing that will happen with the proposed modification. This is because neither Texel nor SCHRS regard the portion of the mast that is not followed by the sail itself to be effective sailarea.
The statement is only partically correct. Texel indeed calculates sailarea as indicated by me earlier but SCHRS (ISAF) does not. I check the 2007 version of the SCHRS system today and it clearly defines the mast area, which is to be included in the mainsail area, as :
Area of Mast = (Total Length x Perimeter / 2) m2
Clearly this definition proofs the error in my earlier statement.
source :
http://www.schrs.com/index.php?page=measurementThis ends my posts setting the facts straight. We also had an interesting discussion about the rule change today, read my follow on post for more details.
Wouter
