What is the source of your sail area number and what measurement formula was used to compute the sail area? Have you put a tape to a Hobie 16 sail and used the spreadsheet provided by SCHRS?
My sources are:
http://www.hobiecat.com/sail/hobie-16/http://www.hobiecat.com/sail/hobie-16/specs/http://hobieclass.com/hobie-16/https://en.wikipedia.org/wiki/Hobie_16http://sailboatdata.com/viewrecord.asp?class_id=3852Now, there are some websites that list a smaller area for the mainsail than SCHRS does, but they also spec a larger jib than SCHRS does. So, does the 20.25 m2 value given by these sources include the mast in that number, or not? I know that sailboatdata.com does not include mast area for other classes. I don't have a H16 myself - otherwise I would have measured the main myself to find out. That's why I asked.
I have said it's straight forward, it's not difficult to understand and the calculations are done for you by the provided spreadsheet. The system doesn't take any special skills it just requires the ability to follow directions and an attention to detail.
Yes, there's a spreadsheet, and if you already have all the numbers that are needed to plug into the spreadsheet, then it's straightforward.
However, if you don't already have those measurements, and if the class allows different configurations, then it is not at all apparent how to generate the numbers that go into the spreadsheet. Using different inputs that I have tried for an Isotope, I get a rating number anywhere from 1.053 to 1.205. That's a huge range and the outlying values are obviously incorrect. There's no way that an Isotope is faster than a Taipan 4.9, nor slower than a Hobie 16. Reality has to lie somewhere in between, but how to get there is definitely NOT simply a matter of following directions.
Once the number is created for a stock boat it's as easy to use as DPN.
Unfortunately, I don't have a number for a stock Isotope yet - that's what I'm trying to create. And, what happens if you have a stock boat that has a different configuration than the one that the SCHRS rating used? What do you do?
If you have questions about SCHRS your best bet is to contact SCHRS, IMO.
I know that under Portsmouth, if someone sails under-crewed, then there's a modifier to apply. Under SCHRS I have to call and ask? What about pin-top vs. square top? Should I call SCHRS and ask? Where I race, SCHRS is not as easy to use as DPN.
But, I'm not trying to detract from SCHRS, I'm just trying to follow the process to get an appropriate SCHRS rating for my class - and understand how to handle all the different configurations that are class legal. Oh, and apparently I need to get the measurements done by an ISAF certified measurer. Does anybody know where I can find one of those?
Sincerely,
Eric
