Hi Wouter,

Take your time - it's worth it.

Let me know if I can be of any assistance.

Here's a super simple formula I derived for time-on-time scoring:

TOT Handicap = .0673 x (SA^.584) x (DISPL^-.325) x (L^.624)

where SA = total sail area in square feet
Displ = displacement in pounds
L = length in feet
the ^ means raised to the power

Sorry, no width consideration - but this was just a quickie attempt. (that seems to work rather well, though).

If you invert the TOT handicap and divide by 100, you'll get numbers very close to the USSA D-PN's for most boats (in non-spin config). Try it!

Take care and good luck!

Steve