Leigh & Lowton Sailing Club

LLSC PY Adjustments

Overview

The RYA’s National PYs are updated every year and are available here along with an explanation of how they are to be used. They ensure that boats of different speeds can race together fairly.

April 2023 PY Update

For technical reasons, we are now using the RYA National PYs and not making local LLSC adjustments. This maybe reviewed again in the future.

April 2022 PY Update

To ensure handicap racing at Leigh and Lowton is as fair as possible, we use the RYA’s pyonline.org.uk website to calculate local PY amendments based on our racing results. This is done on a regular basis and the process used is detailed below, along with the latest set of amendments. This is an analytical process and not opinion based.

These local amendments to the RYA 2022 National PYs are as follows. This revison takes into account races up to March 2022, and apply from 30th March:

These amendments are based on 5 years’ data.

  • Albacore 1032 (National PY 1040 LLSC adjustment= -8)
  • Blaze 1043 (National PY 1033 LLSC adjustment= 10)
  • Devoti D-one 939 (National PY 948 LLSC adjustment= -9)
  • Devoti D-Zero 1035 (National PY 1029 LLSC adjustment= 6)
  • Enterprise 1132 (National PY 1122 LLSC adjustment= 10)
  • GP14 1132 (National PY 1130 LLSC adjustment= 2)
  • Laser 1091 (National PY 1100 LLSC adjustment= -9)
  • Laser 4.7 1207 (National PY 1208 LLSC adjustment= -1)
  • Laser Radial 1136 (National PY 1147 LLSC adjustment= -11)
  • Miracle 1192 (National PY 1194 LLSC adjustment= -2)
  • Phantom 1014 (National PY 1004 LLSC adjustment= 10)
  • RS 200 1036 (National PY 1046 LLSC adjustment= -10)
  • RS 400 933 (National PY 942 LLSC adjustment= -9)
  • RS Aero 7 1061 (National PY 1065 LLSC adjustment= -4)
  • RS Tera Pro 1357 (National PY 1359 LLSC adjustment= -2)
  • RS Tera Sport 1446 (National PY 1445 LLSC adjustment= 1)
  • Streaker 1123 (National PY 1128 LLSC adjustment= -5)
  • Solo 1153 (National PY 1142 LLSC adjustment= 11)
  • Solution 1102 (National PY 1092 LLSC adjustment= 10)
  • Supernova 1072 (National PY 1077 LLSC adjustment= -5)
  • Topper 1352 (National PY 1365 LLSC adjustment= -13)
  • Wayfarer 1099 (National PY 1102 LLSC adjustment= -3)

Process

Race data from our various handicap series from 2007 onwards is regularly submitted to the RYA website and their system analyses the data and produces suggested PNs for classes at L&LSC. Basically, the RYA compute the average corrected time for a race and then for each class within it. This shows what change in each class handicap would be needed for their average corrected times to all be the same. Poor performers (outside 20%) are automatically excluded before class handicaps are computed by the RYA. This is intended to prevent undue influence from those who were late to the start, having a really bad day or simply new to the sport or the boat. Movements in class PNs are weighted so that a small number of results for any class do not have an undue influence compared to those with large numbers of results.

The RYA also give a confidence level. ‘Confidence Factor (c.f.)’ refers to the stability of the number – not its accuracy. Confidence in the stability of PNs obviously rises as more race data is input. We decided to recognise the likelihood of increasing confidence, and so the Sailing Committee agreed that the changes recommended by the RYA for LLSC will be ‘damped’ by applying a % adjustment. Depending on the confidence level the % of any change applied will be as follows, upto a maximum variation from the national PYs of +/- 1.5% (+/-1.0% from 2020)

0.00 c.f. = 0 % RYA Number to be used
0.05 c.f. = 10%,
0.10 c.f. = 20%,
0.15 c.f. = 30%,
0.20 c.f. = 40%,
0.25 c.f. = 50%,
0.30 c.f. = 60%,
0.35 c.f. = 70%,
0.40 c.f. = 80%,
0.45 c.f. = 90%,
0.50 c.f. = 100%

Some classes have a lower PY and some a higher PY as a result.

For Example in November 2017 the National PY for the Feva was 1240, and the recommended LLSC PY from pyonline.org.uk was 1215 with a confidence factor of 0.48.

1215 – 1240 = -25 recommended adjustment. The 0.48 c.f. means only 90% of this -25 adjustment is applied, i.e. -23. This is then capped at -19 (1.5% of 1240). The LLSC PY is therefore 1240 – 19 = 1221

As of 2022 we have submitted nearly 15 years’ data to the RYA. The sailing committee has decided to only use LLSC race results from the last 5 years to determine the LLSC PYs to ensure the PYs best reflect current performance.

Please contact the Sailing Manager if you require more information.

November 2021 PY Update

These local amendments to the RYA 2021 National PYs are as follows. This revison takes into account races up to 1st November 2021, and apply from 6th November:

  • 29ER 905 (National PY 903 LLSC adjustment= 2)
  • Albacore 1030 (National PY 1040 LLSC adjustment= -10)
  • Blaze 1043 (National PY 1033 LLSC adjustment= 10)
  • Devoti D-one 939 (National PY 948 LLSC adjustment= -9)
  • Devoti D-Zero 1033 (National PY 1029 LLSC adjustment= 4)
  • Enterprise 1121 (National PY 1122 LLSC adjustment= -1)
  • GP14 1126 (National PY 1130 LLSC adjustment= -4)
  • Laser 1089 (National PY 1100 LLSC adjustment= -11)
  • Laser 4.7 1206 (National PY 1208 LLSC adjustment= -2)
  • Laser Radial 1136 (National PY 1147 LLSC adjustment= -11)
  • Miracle 1183 (National PY 1194 LLSC adjustment= -11)
  • National 12 1066 (National PY 1064 LLSC adjustment= 2)
  • Optimist 1642 (National PY 1642 LLSC adjustment= 0)
  • Phantom 1014 (National PY 1004 LLSC adjustment= 10)
  • RS 100 10.2 986 (National PY 981 LLSC adjustment= 5)
  • RS 200 1039 (National PY 1046 LLSC adjustment= -7)
  • RS 300 971 (National PY 970 LLSC adjustment= 1)
  • RS 400 935 (National PY 942 LLSC adjustment= -7)
  • RS Aero 7 1057 (National PY 1065 LLSC adjustment= -8)
  • RS Feva XL 1232 (National PY 1244 LLSC adjustment= -12)
  • RS Tera Sport 1446 (National PY 1445 LLSC adjustment= 1)
  • Solo 1153 (National PY 1142 LLSC adjustment= 11)
  • Solution 1102 (National PY 1092 LLSC adjustment= 10)
  • Streaker 1135 (National PY 1128 LLSC adjustment= 7)
  • Supernova 1071 (National PY 1077 LLSC adjustment= -6)
  • Topper 1352 (National PY 1365 LLSC adjustment= -13)
  • Wayfarer 1099 (National PY 1102 LLSC adjustment= -3)

March 2020 PY Update

The March 2020 local amendments to the RYA 2020 National PYs are as follows. This revison takes into account races up to 15th March 2020, and apply from 29th March:

  • 29ER 905 (National PY 903 LLSC adjustment= 2)
  • Albacore 1034 (National PY 1040 LLSC adjustment= -6)
  • Blaze 1037 (National PY 1033 LLSC adjustment= 4)
  • Enterprise 1118 (National PY 1122 LLSC adjustment= -4)
  • GP14 1127 (National PY 1130 LLSC adjustment= -3)
  • Laser 1089 (National PY 1100 LLSC adjustment= -11)
  • Laser 4.7 1206 (National PY 1208 LLSC adjustment= -2)
  • Laser Radial 1136 (National PY 1147 LLSC adjustment= -11)
  • Miracle 1183 (National PY 1194 LLSC adjustment= -11)
  • Optimist 1647 (National PY 1642 LLSC adjustment= 5)
  • Phantom 1012 (National PY 1004 LLSC adjustment= 8)
  • RS 100 10.2 983 (National PY 981 LLSC adjustment= 2)
  • RS 200 1039 (National PY 1046 LLSC adjustment= -7)
  • RS 300 965 (National PY 970 LLSC adjustment= -5)
  • RS 400 934 (National PY 942 LLSC adjustment= -8)
  • RS Aero 7 1057 (National PY 1065 LLSC adjustment= -8)
  • RS Feva XL 1232 (National PY 1244 LLSC adjustment= -12)
  • Solo 1152 (National PY 1142 LLSC adjustment= 10)
  • Solution 1102 (National PY 1092 LLSC adjustment= 10)
  • Streaker 1129 (National PY 1128 LLSC adjustment= 1)
  • Supernova 1071 (National PY 1077 LLSC adjustment= -6)
  • Topper 1352 (National PY 1365 LLSC adjustment= -13)

November 2019 PY Update

The November 2019 local amendments to the RYA 2019 National PYs are as follows. This revison takes into account races up to 27th October 2019, and apply from 3rd November:

  • 29ER 909 (National PY 907 LLSC adjustment= 2)
  • Albacore 1033 (National PY 1038 LLSC adjustment= -5)
  • Blaze 1031 (National PY 1027 LLSC adjustment= 4)
  • Enterprise 1118 (National PY 1119 LLSC adjustment= -1)
  • GP14 1128 (National PY 1130 LLSC adjustment= -2)
  • Laser 1085 (National PY 1099 LLSC adjustment= -14)
  • Laser 4.7 1206 (National PY 1207 LLSC adjustment= -1)
  • Laser Radial 1128 (National PY 1145 LLSC adjustment= -17)
  • Miracle 1176 (National PY 1194 LLSC adjustment= -18)
  • Optimist 1646 (National PY 1642 LLSC adjustment= 4)
  • Phantom 1012 (National PY 1002 LLSC adjustment= 10)
  • RS 100 10.2 983 (National PY 981 LLSC adjustment= 2)
  • RS 200 1039 (National PY 1046 LLSC adjustment= -7)
  • RS 300 965 (National PY 970 LLSC adjustment= -5)
  • RS 400 935 (National PY 942 LLSC adjustment= -7)
  • RS Aero 7 1057 (National PY 1065 LLSC adjustment= -8)
  • RS Feva XL 1221 (National PY 1240 LLSC adjustment= -19)
  • Solo 1152 (National PY 1143 LLSC adjustment= 9)
  • Solution 1103 (National PY 1089 LLSC adjustment= 14)
  • Streaker 1130 (National PY 1128 LLSC adjustment= 2)
  • Supernova 1072 (National PY 1077 LLSC adjustment= -5)
  • Topper 1343 (National PY 1363 LLSC adjustment= -20)

March 2019 PY Update

The March 2019 local amendments to the RYA 2019 National PYs are as follows. This revison expands the races taken into account to include those upto the end of the 2019 Tipsy Series and apply from 31st March:

  • 29ER 909 (National PY 907 LLSC adjustment= 2)
  • Albacore 1037 (National PY 1038 LLSC adjustment= -1)
  • Blaze 1029 (National PY 1027 LLSC adjustment= 2)
  • Enterprise 1117 (National PY 1119 LLSC adjustment= -2)
  • Europe 1137 (National PY 1141 LLSC adjustment= -4)
  • GP14 1127 (National PY 1130 LLSC adjustment= -3)
  • Laser 1083 (National PY 1099 LLSC adjustment= -16)
  • Laser 4.7 1205 (National PY 1207 LLSC adjustment= -2)
  • Laser Radial 1128 (National PY 1145 LLSC adjustment= -17)
  • Miracle 1176 (National PY 1194 LLSC adjustment= -18)
  • National 12 1066 (National PY 1064 LLSC adjustment= 2)
  • Optimist 1645 (National PY 1642 LLSC adjustment= 3)
  • Phantom 1016 (National PY 1002 LLSC adjustment= 14)
  • RS 100 10.2 986 (National PY 981 LLSC adjustment= 5)
  • RS 200 1040 (National PY 1046 LLSC adjustment= -6)
  • RS 300 971 (National PY 970 LLSC adjustment= 1)
  • RS 400 938 (National PY 942 LLSC adjustment= -4)
  • RS Aero 7 1059 (National PY 1065 LLSC adjustment= -6)
  • RS Feva XL 1221 (National PY 1240 LLSC adjustment= -19)
  • Solo 1154 (National PY 1143 LLSC adjustment= 11)
  • Solution 1102 (National PY 1089 LLSC adjustment= 13)
  • Streaker 1140 (National PY 1128 LLSC adjustment= 12)
  • Supernova 1072 (National PY 1077 LLSC adjustment= -5)
  • Topper 1343 (National PY 1363 LLSC adjustment= -20)

November 2018 PY Update

The November 2018 local amendments to the RYA 2018 National PYs are as follows. This revison expands the races taken into account to include those upto the end of October 2018 and apply from 2018’s Revett series:

  • 29ER 913 (National PY 912 LLSC adjustment= 1)
  • Albacore 1036 (National PY 1038 LLSC adjustment= -2)
  • Enterprise 1117 (National PY 1116 LLSC adjustment= 1)
  • Europe 1141 (National PY 1145 LLSC adjustment= -4)
  • GP14 1129 (National PY 1133 LLSC adjustment= -4)
  • Laser 1083 (National PY 1098 LLSC adjustment= -15)
  • Laser 4.7 1206 (National PY 1207 LLSC adjustment= -1)
  • Laser Radial 1125 (National PY 1142 LLSC adjustment= -17)
  • Miracle 1182 (National PY 1200 LLSC adjustment= -18)
  • National 12 1066 (National PY 1064 LLSC adjustment= 2)
  • Optimist 1645 (National PY 1655 LLSC adjustment= -10)
  • Phantom 1014 (National PY 999 LLSC adjustment= 15)
  • RS 100 10.2 985 (National PY 981 LLSC adjustment= 4)
  • RS 200 1040 (National PY 1046 LLSC adjustment= -6)
  • RS 300 971 (National PY 972 LLSC adjustment= -1)
  • RS 400 938 (National PY 942 LLSC adjustment= -4)
  • RS Aero 7 1061 (National PY 1068 LLSC adjustment= -7)
  • RS Feva XL 1221 (National PY 1240 LLSC adjustment= -19)
  • Solo 1154 (National PY 1143 LLSC adjustment= 11)
  • Solution 1100 (National PY 1087 LLSC adjustment= 13)
  • Streaker 1140 (National PY 1128 LLSC adjustment= 12)
  • Supernova 1073 (National PY 1075 LLSC adjustment= -2)
  • Topper 1338 (National PY 1358 LLSC adjustment= -20)

March 2018 PY Update

The March 2018 local amendments to the RYA 2018 National PYs are as follows. This revison expands the races taken into account to include those upto the end of the Tipsy series 2018 and apply from 31st March:

  • 29ER 914 (National PY 912 LLSC adjustment= 2)
  • Albacore 1036 (National PY 1038 LLSC adjustment= -2)
  • Enterprise 1115 (National PY 1116 LLSC adjustment= -1)
  • Europe 1141 (National PY 1145 LLSC adjustment= -4)
  • GP14 1129 (National PY 1133 LLSC adjustment= -4)
  • Laser 1082 (National PY 1098 LLSC adjustment= -16)
  • Laser 4.7 1206 (National PY 1207 LLSC adjustment= -1)
  • Laser Radial 1125 (National PY 1142 LLSC adjustment= -17)
  • Miracle 1182 (National PY 1200 LLSC adjustment= -18)
  • National 12 1066 (National PY 1064 LLSC adjustment= 2)
  • Optimist 1646 (National PY 1655 LLSC adjustment= -9)
  • Phantom 1014 (National PY 999 LLSC adjustment= 15)
  • RS 100 10.2 985 (National PY 981 LLSC adjustment= 4)
  • RS 200 1041 (National PY 1046 LLSC adjustment= -5)
  • RS 300 971 (National PY 972 LLSC adjustment= -1)
  • RS 400 939 (National PY 942 LLSC adjustment= -3)
  • RS Aero 7 1063 (National PY 1068 LLSC adjustment= -5)
  • RS Feva XL 1221 (National PY 1240 LLSC adjustment= -19)
  • Solo 1154 (National PY 1143 LLSC adjustment= 11)
  • Solution 1098 (National PY 1087 LLSC adjustment= 11)
  • Streaker 1139 (National PY 1128 LLSC adjustment= 11)
  • Supernova 1073 (National PY 1075 LLSC adjustment= -2)
  • Topper 1338 (National PY 1358 LLSC adjustment= -20)

November 2017 PY Update

The November 2017 local amendments to the RYA 2017 National PYs are as follows. This revison expands the races taken into account to include those upto November 2017, and apply from the 1st November 2017:

  • Albacore 1040 (National PY 1041 LLSC adjustment= -1)
  • GP14 1130 (National PY 1133 LLSC adjustment= -3)
  • Enterprise 1115 (National PY 1113 LLSC adjustment= +2)
  • Europe 1141 (National PY 1145 LLSC adjustment= -4)
  • Laser 1082 (National PY 1097 LLSC adjustment= -15)
  • Laser 4.7 1202 (National PY 1200 LLSC adjustment= +2)
  • Laser Radial 1122 (National PY 1139 LLSC adjustment= -17)
  • Miracle 1192 (National PY 1210 LLSC adjustment= -18)
  • National 12 1066 (National PY 1064 LLSC adjustment= +2)
  • Optimist 1646 (National PY 1665 LLSC adjustment= -19)
  • Phantom 1014 (National PY 999 LLSC adjustment= +15)
  • RS 100 10.2 983 (National PY 978 LLSC adjustment= +5)
  • RS 200 1041 (National PY 1047 LLSC adjustment= -6)
  • RS 300 970 (National PY 973 LLSC adjustment= -3)
  • RS 400 939 (National PY 942 LLSC adjustment= -3)
  • RS Aero 7 1067 (National PY 1071 LLSC adjustment -4)
  • RS Feva XL 1221 (National PY 1240 LLSC adjustment= -19)
  • Solo 1153 (National PY 1143 LLSC adjustment= +10)
  • Solution 1097 (National PY 1087 LLSC adjustment= +10)
  • Streaker 1142 (National PY 1132 LLSC adjustment= +10)
  • Supernova 1074 (National PY 1075 LLSC adjustment= -1)
  • Topper 1333 (National PY 1347 LLSC adjustment= -14)

April 2017 PY Update

The April 2017 local amendments to the RYA 2017 National PYs are as follows. This revison expands the races taken into account to include those upto December 2016, and apply from the start of April:

  • Enterprise 1113 (National PY 1113 LLSC adjustment= 0)
  • Laser 1082 (National PY 1097 LLSC adjustment= -15)
  • Laser 4.7 1201 (National PY 1200 LLSC adjustment= 1)
  • Laser Radial 1122 (National PY 1139 LLSC adjustment= -17)
  • Miracle 1192 (National PY 1210 LLSC adjustment= -18)
  • National 12 1066 (National PY 1064 LLSC adjustment= 2)
  • Optimist 1646 (National PY 1665 LLSC adjustment= -19)
  • Phantom 1014 (National PY 999 LLSC adjustment= 15)
  • RS 100 10.2 981 (National PY 978 LLSC adjustment= 3)
  • RS 200 1040 (National PY 1047 LLSC adjustment= -7)
  • RS 300 971 (National PY 973 LLSC adjustment= -2)
  • RS 400 940 (National PY 942 LLSC adjustment= -2)
  • RS Feva XL 1222 (National PY 1240 LLSC adjustment= -18)
  • Solo 1153 (National PY 1143 LLSC adjustment= 10)
  • Solution 1094 (National PY 1087 LLSC adjustment= 7)
  • Streaker 1142 (National PY 1132 LLSC adjustment= 10)
  • Supernova 1072 (National PY 1075 LLSC adjustment= -3)
  • Topper 1333 (National PY 1347 LLSC adjustment= -14)

November 2016 PY Update

The November 2016 local amendments to the RYA 2016 National PYs are as follows. This revison expands the races taken into account to include those between March and November 2016, and apply from the start of the 2016 Revett series:

  • Enterprise 1113 (National PY 1113 LLSC adjustment= 0)
  • Laser 1082 (National PY 1095 LLSC adjustment= -13)
  • Laser 4.7 1197 (National PY 1195 LLSC adjustment= 2)
  • Laser Radial 1119 (National PY 1136 LLSC adjustment= -17)
  • Miracle 1192 (National PY 1210 LLSC adjustment= -18)
  • National 12 1066 (National PY 1064 LLSC adjustment= 2)
  • Optimist 1646 (National PY 1665 LLSC adjustment= -19)
  • Phantom 1010 (National PY 995 LLSC adjustment= 15)
  • RS 100 10.2 981 (National PY 978 LLSC adjustment= 3)
  • RS 200 1040 (National PY 1047 LLSC adjustment= -7)
  • RS 300 972 (National PY 979 LLSC adjustment= -7)
  • RS 400 940 (National PY 943 LLSC adjustment= -3)
  • RS Feva XL 1221 (National PY 1235 LLSC adjustment= -14)
  • Solo 1153 (National PY 1140 LLSC adjustment= 13)
  • Solution 1095 (National PY 1090 LLSC adjustment= 5)
  • Streaker 1145 (National PY 1137 LLSC adjustment= 8)
  • Supernova 1072 (National PY 1075 LLSC adjustment= -3)
  • Topper 1333 (National PY 1341 LLSC adjustment= -8)

March 2016 PY Update

The RYA’s 2016 Portsmouth Yardsticks are available here

These are used for handicap racing at Leigh and Lowton, from 27th March 2016, with the following local
amendments which were calculated using the process detailed below.

  • Enterprise 1111 (National PY 1113 LLSC adjustment= -2)
  • Laser 1081 (National PY 1095 LLSC adjustment= -14)
  • Laser Radial 1119 (National PY 1136 LLSC adjustment= -17)
  • Miracle 1192 (National PY 1210 LLSC adjustment= -18)
  • National 12 1066 (National PY 1064 LLSC adjustment= 2)
  • Optimist 1647 (National PY 1665 LLSC adjustment= -18)
  • Phantom 1010 (National PY 995 LLSC adjustment= 15)
  • RS 100 10.2 981 (National PY 978 LLSC adjustment= 3)
  • RS 200 1040 (National PY 1047 LLSC adjustment= -7)
  • RS 300 972 (National PY 979 LLSC adjustment= -7)
  • RS 400 940 (National PY 943 LLSC adjustment= -3)
  • RS Feva XL 1229 (National PY 1235 LLSC adjustment= -6)
  • Solo 1152 (National PY 1140 LLSC adjustment= 12)
  • Solution 1094 (National PY 1090 LLSC adjustment= 4)
  • Streaker 1143 (National PY 1137 LLSC adjustment= 6)
  • Supernova 1073 (National PY 1075 LLSC adjustment= -2)
  • Topper 1333 (National PY 1341 LLSC adjustment= -8)
  • X1 900 (no National PY available)

2014/2015

Amendments to the local PYs were made in 2014 and 2015, but the details are not recorded here.