personal performance

It's reasonably easy to do something on those lines. What I do to calculate personal handicaps at
my club is to stuff all the results into a spreadsheet and calculate each corrected time as a percent of the winners ct. Average everyone's percentages and there you go. Club hotshots will be between 100 and 105%, beginners 120% or more.

If you want your personal PY for that race then multiply your real PY by the percentage, and the result will
a) depress you and
b) enlighten you to how much value there is in whinging about the odd 5 points on a boat's PY

Edited by JimC - 03 Oct 14 at 12:12pm

You can work it out on a calculator too, if you have the list of results with elapsed and corrected time. I usually end up doing it by trial and error, but I'm sure anyone better at maths than me would know how to reverse the corrected time process.

I suppose really it should assume that the mid boat sailed to PY, but that would be a bit of a lottery, I guess.

All sounds quite complicated for a simpleton like me. Essentially it seems there's no way to measure your performancr against the recognised performance of the boat because you have to measure yourself against someone else in the race wuo could be sailing above the recognised performance of their boat.

Kev

You are right that it isn't possible to compare in isolation your personal performance against the 'standard' performance for your boat.  However if you race regularly in a fleet of say 15 or more boats, you can compare your performance against your peers and see if it is improving over time.

In effect you use the PYS algorithm to get the personal PN for a race (PPN).
      - calculate the average corrected time for all finishers
      - remove all boats that have a CT slower than the average corrected time + 5%
      - recalculate the average corrected time (ACT) for all remaining boats
      - use the formulae PPN = ET * 1000 / ACT

This is effect compares your performance against an average of your peers.

Our race management software automatically produces PPNs for everyone racing at the club as part of the results calculation - and members can check their data (which goes back 3 years now) - and average it over any period they choose.  It is very useful when coaching  beginners as they tend to make fairly significant improvements over the course of a single season.  I have started sailing a different class of boat this year which is rather more traditional than most of the boats I have sailed - I can see from the data that I appear to have improved by around 10 points if I average the first half of the year against the second half of the year - slow but at least I'm getting better!.

You can also use the same calculation to average over groups of boats (classes) to help with decisions on local PN adjustments.

Mark



Edited by marke - 06 Oct 14 at 9:30am