Can anyone assist me? It is 3yrs since I last used Sailwave so please excuse if I am asking something that is common to all. During summer we run a twilight series on a Wednesday night of a mixed fleet of Keelboats and Trailer Yachts for a given time (1.25hrs) and count and time the laps each boat completes. To get a handicap result we divide the time by the laps and apply a percentage handicap (e.g. 0.750)
Can Sailwave produce some results as described? I have tried and I can get in the race coloum a time/laps but I can get it to publish these results and show a BCR which I would like to do.Can anyone help?
Cheers
Wayne Nolan
Christchurch NZ
Sailwave will score a race correctly if elapsed time (or start / finish times) are entered together with no. of laps. It calculates positions based on average lap times, modified by class handicap.
BCR can only displayed as an option in individual race publication.
Malcolm Osborne
South Africa
···
----- Original Message -----
From:
wayne.nolan_2003
Sent: Thursday, November 19, 2009 3:04 AM
Subject: [sailwave] Averaging Laps
Can anyone assist me? It is 3yrs since I last used Sailwave so please excuse if I am asking something that is common to all. During summer we run a twilight series on a Wednesday night of a mixed fleet of Keelboats and Trailer Yachts for a given time (1.25hrs) and count and time the laps each boat completes. To get a handicap result we divide the time by the laps and apply a percentage handicap (e.g. 0.750)
Can Sailwave produce some results as described? I have tried and I can get in the race coloum a time/laps but I can get it to publish these results and show a BCR which I would like to do.Can anyone help?
Cheers
Wayne Nolan
Christchurch NZ
Sadly, averaging laps produces unfair results when the wind changes significantly during the regatta. Boat A sails 2 laps in 1:59 in a regatta of 2 hours and finishes the 3rd in 3:30, average 01:10, boat B sails the whole race behind A and is kucky to finish in 02:02, average 01:01, congratulations for a winner who never led the race.
Another system is possible, but I’m afraid not available with sailwave, divide the reference time (02:00) by a decimal number of laps, 2 + 1*0:01/1:31 = 2.010989 (Avg time 00:59:40) and (assumed the first lap of B was 00:57) 1+1:03/1:05 = 1.980952 (Avg lap 01:00:35), you can make an Excel sheet with number of entire laps, finish time of last lap before, finish time of first lap after reference time, then calculate the average lap time and introduce in Sailwave…
But it should be son nice to have the formula built-in
Regards
Phil
···
----- Original Message -----
From:
Malcolm Osborne
Sent: Thursday, November 19, 2009 8:56 AM
Subject: Re: [sailwave] Averaging Laps
Sailwave will score a race correctly if elapsed time (or start / finish times) are entered together with no. of laps. It calculates positions based on average lap times, modified by class handicap.
BCR can only displayed as an option in individual race publication.
Malcolm Osborne
South Africa
----- Original Message -----
From:
wayne.nolan_2003
Sent: Thursday, November 19, 2009 3:04 AM
Subject: [sailwave] Averaging Laps
Can anyone assist me? It is 3yrs since I last used Sailwave so please excuse if I am asking something that is common to all. During summer we run a twilight series on a Wednesday night of a mixed fleet of Keelboats and Trailer Yachts for a given time (1.25hrs) and count and time the laps each boat completes. To get a handicap result we divide the time by the laps and apply a percentage handicap (e.g. 0.750) Can Sailwave produce some results as described? I have tried and I can get in the race coloum a time/laps but I can get it to publish these results and show a BCR which I would like to do.Can anyone help?Cheers
Wayne Nolan
Christchurch NZ
I disagree. I think that average laps evens out changing conditions. Consider a 3 lap race with a handicap fleet where the fast boats finish within say 40 minutes and then the wind drops. The slower boats are still on the course with no wind. Alternativley the wind picks up during the later stages of the race. The faster boats which have already finished will be beaten by the slower boats which have the better wind for their last laps. Average lap racing evens all this out as all boats receive the same weather conditions for the duration of the race.
Keith.
Keith Kendall.
Tel 01752 - 405122. Mobile 07795 - 294621
···
To: sailwave@yahoogroups.com
From: philippe@detroy.org
Date: Thu, 19 Nov 2009 10:29:49 +0100
Subject: Re: [sailwave] Averaging Laps
Sadly, averaging laps produces unfair results when the wind changes significantly during the regatta. Boat A sails 2 laps in 1:59 in a regatta of 2 hours and finishes the 3rd in 3:30, average 01:10, boat B sails the whole race behind A and is kucky to finish in 02:02, average 01:01, congratulations for a winner who never led the race.
Another system is possible, but I’m afraid not available with sailwave, divide the reference time (02:00) by a decimal number of laps, 2 + 1*0:01/1:31 = 2.010989 (Avg time 00:59:40) and (assumed the first lap of B was 00:57) 1+1:03/1:05 = 1.980952 (Avg lap 01:00:35), you can make an Excel sheet with number of entire laps, finish time of last lap before, finish time of first lap after reference time, then calculate the average lap time and introduce in Sailwave…
But it should be son nice to have the formula built-in
Regards
Phil
----- Original Message -----
From: Malcolm Osborne
Sent: Thursday, November 19, 2009 8:56 AM
Subject: Re: [sailwave] Averaging Laps
Sailwave will score a race correctly if elapsed time (or start / finish times) are entered together with no. of laps. It calculates positions based on average lap times, modified by class handicap.
BCR can only displayed as an option in individual race publication.
Malcolm Osborne
South Africa
----- Original Message -----
From: wayne.nolan_2003
Sent: Thursday, November 19, 2009 3:04 AM
Subject: [sailwave] Averaging Laps
Can anyone assist me? It is 3yrs since I last used Sailwave so please excuse if I am asking something that is common to all. During summer we run a twilight series on a Wednesday night of a mixed fleet of Keelboats and Trailer Yachts for a given time (1.25hrs) and count and time the laps each boat completes. To get a handicap result we divide the time by the laps and apply a percentage handicap (e.g. 0.750)
Can Sailwave produce some results as described? I have tried and I can get in the race coloum a time/laps but I can get it to publish these results and show a BCR which I would like to do.Can anyone help?
Cheers
Wayne Nolan
Christchurch NZ
View your other email accounts from your Hotmail inbox. Add them now.
Handicap racing is always less fait than elapsed time.
Not only due to wind, but also, where applicable, current.
A boat with PY 1000 sails 4 knots, so for 2 NM and back, with a stream of jiust 1 knot, it takes 40 minutes up, 24 minutes down, corrected time 01:04
A boat with PY 800 sails 5 knots, 30 minutes up, 20 minutes down, elapsed time 00:50, corrected 01:02:30.
When in addition the tide turns during the race, higher PN are still fighting against the foul tide while larger boats are taking the best advantage.
Only when the regatta is a “transit race” like Breskens to Anwerp, Sheerness to London or so, smaller boats can take the best of a long fair tide.
On one occasion, the computer gave me a victory by more than one lap on a competitor finishing in front of me, both with same handicap. I refused the trophy.
There can be a moderation in the formula, like "the average lap time is the smallest of the finish time of the first lap finished after the reference time divided by the number of laps or the reference time divided by (thr number of laps minus one)…
But formulas using an entire number of laps and a part of the last lap at the average speed of this lap gives the fairest picture of the race.
Phil
···
----- Original Message -----
From:
Keith Kendall
Sent: Thursday, November 19, 2009 11:29 AM
Subject: RE: [sailwave] Averaging Laps
I disagree. I think that average laps evens out changing conditions. Consider a 3 lap race with a handicap fleet where the fast boats finish within say 40 minutes and then the wind drops. The slower boats are still on the course with no wind. Alternativley the wind picks up during the later stages of the race. The faster boats which have already finished will be beaten by the slower boats which have the better wind for their last laps. Average lap racing evens all this out as all boats receive the same weather conditions for the duration of the race.
Keith.
Keith Kendall.
Tel 01752 - 405122. Mobile 07795 - 294621
To: sailwave@yahoogroups.com
From: philippe@detroy.org
Date: Thu, 19 Nov 2009 10:29:49 +0100
Subject: Re: [sailwave] Averaging LapsSadly, averaging laps produces unfair results when the wind changes significantly during the regatta. Boat A sails 2 laps in 1:59 in a regatta of 2 hours and finishes the 3rd in 3:30, average 01:10, boat B sails the whole race behind A and is kucky to finish in 02:02, average 01:01, congratulations for a winner who never led the race.
Another system is possible, but I’m afraid not available with sailwave, divide the reference time (02:00) by a decimal number of laps, 2 + 1*0:01/1:31 = 2.010989 (Avg time 00:59:40) and (assumed the first lap of B was 00:57) 1+1:03/1:05 = 1.980952 (Avg lap 01:00:35), you can make an Excel sheet with number of entire laps, finish time of last lap before, finish time of first lap after reference time, then calculate the average lap time and introduce in Sailwave…
But it should be son nice to have the formula built-in
Regards
Phil
----- Original Message -----
From: Malcolm Osborne
Sent: Thursday, November 19, 2009 8:56 AM
Subject: Re: [sailwave] Averaging Laps
Sailwave will score a race correctly if elapsed time (or start / finish times) are entered together with no. of laps. It calculates positions based on average lap times, modified by class handicap.
BCR can only displayed as an option in individual race publication.
Malcolm Osborne
South Africa
----- Original Message -----
From: wayne.nolan_2003
Sent: Thursday, November 19, 2009 3:04 AM
Subject: [sailwave] Averaging Laps
Can anyone assist me? It is 3yrs since I last used Sailwave so please excuse if I am asking something that is common to all. During summer we run a twilight series on a Wednesday night of a mixed fleet of Keelboats and Trailer Yachts for a given time (1.25hrs) and count and time the laps each boat completes. To get a handicap result we divide the time by the laps and apply a percentage handicap (e.g. 0.750) Can Sailwave produce some results as described? I have tried and I can get in the race coloum a time/laps but I can get it to publish these results and show a BCR which I would like to do.Can anyone help?Cheers
Wayne Nolan
Christchurch NZ
View your other email accounts from your Hotmail inbox. Add them now.
I have solved the problem Malcolm wrong rating tagged. Thanks for your help.
Cheers
Wayne
···
--- In sailwave@yahoogroups.com, "Malcolm Osborne" <malcolmo@...> wrote:
Sailwave will score a race correctly if elapsed time (or start / finish times) are entered together with no. of laps. It calculates positions based on average lap times, modified by class handicap.
BCR can only displayed as an option in individual race publication.
Malcolm Osborne
South Africa----- Original Message -----
From: wayne.nolan_2003
To: sailwave@yahoogroups.com
Sent: Thursday, November 19, 2009 3:04 AM
Subject: [sailwave] Averaging LapsCan anyone assist me? It is 3yrs since I last used Sailwave so please excuse if I am asking something that is common to all. During summer we run a twilight series on a Wednesday night of a mixed fleet of Keelboats and Trailer Yachts for a given time (1.25hrs) and count and time the laps each boat completes. To get a handicap result we divide the time by the laps and apply a percentage handicap (e.g. 0.750)
Can Sailwave produce some results as described? I have tried and I can get in the race coloum a time/laps but I can get it to publish these results and show a BCR which I would like to do.Can anyone help?
Cheers
Wayne Nolan
Christchurch NZ