Boat Performance Index

Rooster 8.1 1040
Laser (7.1) 1091

Yep 47 points or whatever is too big a jump for rooster 8.1 and even HALO, but thats what happens when sailors rig swap to gain advantage across the wind range on PY. They never get their arses felt in decent breeze which would bring the PY back to where it should be - maybe 20pts, all things being equal. The lord giveth and the lord taketh away!

Unless you plan to use the data to somehow change the handicap as the conditions change as boats sail round the course, I'm not sure how it helps more than the timings do. What we need are more returns, and maybe a magic way of sorting the data so all the anomalies disappear.

It would be a great exercise to do to see how different boats behave, though, and where distance is lost in different classes.

We've got plenty of Halo racing results going back several seasons.  And no - the regulars do use them exclusively in all conditons thank-you.  After all they really do tend to be the larger guys after all - not many lightweights choose them anyway.  Many Clubs are very used to them, and it is not a first season for the Halo rig by several years.  Speculations on this forum regarding 'multi-rig' use are largely just that ... supposition and speculation.  In some classes many individuals don't sail at all in 'too heavy' or 'too light' conditons anyway which potentially makes just as much impact on the sample reliability anyway.  We regularly see it at our club and I dare say you see it at yours as well.

It has been suggested and we are now in the process of formally writing to the RYA enquiring about the sampling selection and size they actually used in producing their first Halo EN as they appear so far away from either the GL numbers or Halo club results that have been around for much longer  ... perhaps Dan we should have forwarded our own class prepared data set for their careful 'consideration' ...     What would be your own view on that  ?  Do you think they would be open to that sort of approach at all ?

Mike L.


Edited by blaze720 - 18 Mar 15 at 11:55pm

Originally posted by blaze720 perhaps Dan we should have forwarded our own class prepared data set for their careful 'consideration' ...     What would be your own view on that  ?  Do you think they would be open to that sort of approach at all ? Mike L.

We got given an (estimate) of 1031 by great lakes, down from the original estimate of 1015 after their consideration of the SailJuice event results. As did the Aero 9, and I guess I prepared a data set for careful consideration for them too.

PY Returns for the class were made in the conventional manner, from sailing clubs independant from the class, and the statistical outcome from that (a sample of many hundred, I would imagine, by the time a number was given by the RYA) was 1040, less than a percent different from my original calculation of 1050. I'd take that sort of accuracy, wouldn't you, Mike?