'Blimey Dave, hadn't spotted this one before! Where do they dream them up from?
Surely:
* if a boat with the same PN does fewer laps it's been sailed badly
o or worse than the one that does more - if we accept the PN
handicapping concept
o or the conditions didn't suit it (in the case of different
types of boat with the same PN)
* the only reason a boat with the same PN does more laps yet ends up
with a worse corrected average lap time is that the wind died on
it's last lap (typical evening race)
* equally for races starting before noon the wind could have risen
As this got as far as the PY manual I clearly have misunderstood this one - anyone close to the RYA Technical Committee care to enlighten me
Good Morning All,
I'm scoring a Multihull event with a single handicap fleet.
The fast boats will do 3 to 4 laps of the course and the slower ones 2 to 3.
I've used the laps on sailwave before and it all works well. But any suggeations of an easy way to implement the adjustment as recommended in the RYA document on Average Lap Racing shown below, or will I have to just do it by hand.
Regards Dave Vinnell
Galway Bay sailing Club
"When boats with the same PN complete different numbers of laps, those sailing fewer laps may have average times less than those sailing more laps. In such a case the �Same PN Adjustment� shown below should be applied. The adjustment increases proportionally the times of those boats sailing fewer laps.
The same PN Adjustment should be applied if a boat�s corrected time is greater than others with the same PN which have completed fewer laps. The adjustment is applied only to the group of boats with that PN. Boats completing one lap fewer than the leading boat in the group will have their Corrected Times adjusted thus:
Modified Time = Corrected Time x Multiplier
Multiplier = Slowest x (Fastest Laps -1)
About-to-Finish Time x Fastest Laps
where:
Fastest Laps is Actual Laps completed by the fastest boat in the group
Slowest is the Elapsed Time of the slowest boat, in the group, to
complete Fastest Laps
_________________________________________________________________
eircom broadband is now up to four times faster than before.
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Hi Mike
Let's just say that it was developed by a mathematician
The reason for the formula is obviously valid but whilst the solution to the problem is no doubt
very sound (I am not a mathematician) it is a minor issue when we look at the bigger shortcomings of
the overall PY scheme.
Suggest you keep this one under your hat & hope the fast boat sailors in your club don't get sight
of it
'Blimey Dave, hadn't spotted this one before! Where do they dream them
up from?
Surely:
* if a boat with the same PN does fewer laps it's been sailed badly
o or worse than the one that does more - if we accept the PN
handicapping concept
o or the conditions didn't suit it (in the case of different
types of boat with the same PN)
* the only reason a boat with the same PN does more laps yet ends up
with a worse corrected average lap time is that the wind died on
it's last lap (typical evening race)
* equally for races starting before noon the wind could have risen
As this got as far as the PY manual I clearly have misunderstood this
one - anyone close to the RYA Technical Committee care to enlighten me
Good Morning All,
I'm scoring a Multihull event with a single handicap fleet.
The fast boats will do 3 to 4 laps of the course and the slower ones 2 to 3.
I've used the laps on sailwave before and it all works well. But any suggeations of an easy way to
implement the adjustment as recommended in the RYA document on Average Lap Racing shown below, or
will I have to just do it by hand.
Regards
Dave Vinnell
Galway Bay sailing Club
"When boats with the same PN complete different numbers of laps, those sailing fewer laps may have
average times less than those sailing more laps. In such a case the �Same PN Adjustment� shown below
should be applied. The adjustment increases proportionally the times of those boats sailing fewer
laps.
The same PN Adjustment should be applied if a boat�s corrected time is greater than others with the
same PN which have completed fewer laps. The adjustment is applied only to the group of boats with
that PN. Boats completing one lap fewer than the leading boat in the group will have their Corrected
Times adjusted thus:
Modified Time = Corrected Time x Multiplier
Multiplier = Slowest x (Fastest Laps -1)
About-to-Finish Time x Fastest Laps
where:
Fastest Laps is Actual Laps completed by the fastest boat in the group
Slowest is the Elapsed Time of the slowest boat, in the group, to
complete Fastest Laps
_________________________________________________________________
eircom broadband is now up to four times faster than before.
Phone 1850 73 00 73 or visit http://home.eircom.net/broadbandoffer
