 
  2024
  90 Minute
  
  Portsmouth Yardstick -Pursuit Racing
 
  Pursuit Race Start time
  calculations
   
  Notes on using the
  spreadsheet
   
  To start, list all classes that are going to race
  in the class column with the slowest (Class with largest PN) first working to
  the fastest class. Next enter the relavant PN's in the PN column. Finally
  enter the race duration in minutes where highlighted in red. from here the
  diffrences in seconds will be given. these tell how much time after the first
  class each class must start. in the example class 1 starts first and then
  class 2 starts 162 seconds latter, class 3 311 seconds after class 1. etc. A
  club may choose to apply the difference from the "scratch" boat in
  either seconds or minutes as in column E or F.
 
  Class
  PN
  Race
  Duration

    (in Seconds)
  Ratio
  Difference (Seconds)
  Difference (Mins)
  Race
  duration

    (in minutes)
 
  Base
  (ILCA 6 / Laser Radial)
  1154
  5400
  0.213703704
  0
  0
  90
 
  Optimist
  1628
  7618
  0.213703704
  2218
  37
   
  RS Tera
  Sport
  1445
  6762
  0.213703704
  1362
  23
   
  Cadet
  1440
  6738
  0.213703704
  1338
  22
   
  Topper
  4.2
  1425
  6668
  0.213703704
  1268
  21
   
  Mirror
  D/H
  1380
  6458
  0.213703704
  1058
  18
   
  Topper
  1369
  6406
  0.213703704
  1006
  17
   
  Laser
  Pico Race
  1330
  6224
  0.213703704
  824
  14
   
  Fusion
  Pro
  1280
  5990
  0.213703704
  590
  10
   
  Fusion
  Pro Spinnaker
  1275
  5966
  0.213703704
  566
  9
   
  RS Feva
  XL
  1244
  5821
  0.213703704
  421
  7
   
  ILCA 4 /
  Laser 4.7
  1213
  5676
  0.213703704
  276
  5
   
  Firefly
  1174
  5494
  0.213703704
  94
  2
   
  ILCA 6 /
  Laser Radial
  1154
  5400
  0.213703704
  0
  0
   
  Europe
  1147
  5367
  0.213703704
  -33
  -1
   
  Solo
  1142
  5344
  0.213703704
  -56
  -1
   
  RS Aero 5
  1141
  5339
  0.213703704
  -61
  -1
   
  Enterprise
  1133
  5302
  0.213703704
  -98
  -2
   
  2000
  1118
  5232
  0.213703704
  -168
  -3
   
  Wayfarer
  1109
  5189
  0.213703704
  -211
  -4
   
  Laser
  Stratos
  1103
  5161
  0.213703704
  -239
  -4
   
  ILCA 7 /
  Laser, RS Aero 6
  1102
  5157
  0.213703704
  -243
  -4
   
  OK
  1100
  5147
  0.213703704
  -253
  -4
   
  RS Vareo
  1093
  5115
  0.213703704
  -285
  -5
   
  Laser II,
  3000, Bahia
  1085
  5077
  0.213703704
  -323
  -5
   
  Laser
  Vago XD
  1071
  5012
  0.213703704
  -388
  -6
   
  RS Aero 7
  1061
  4965
  0.213703704
  -435
  -7
   
  Blaze
  (Fire)
  1050
  4913
  0.213703704
  -487
  -8
   
  Phantom
  (<999)
  1047
  4899
  0.213703704
  -501
  -8
   
  RS 200
  1046
  4895
  0.213703704
  -505
  -8
   
  Blaze
  1033
  4834
  0.213703704
  -566
  -9
   
  Merlin
  Rocket (3157-3330)
  1013
  4740
  0.213703704
  -660
  -11
   
  RS Aero 9
  1008
  4717
  0.213703704
  -683
  -11
   
  Phantom
  (>1100)
  1000
  4679
  0.213703704
  -721
  -12
   
  Blaze
  (Halo)
  992
  4642
  0.213703704
  -758
  -13
   
  Merlin
  Rocket (3554+)
  983
  4600
  0.213703704
  -800
  -13
   
  Contender
  966
  4520
  0.213703704
  -880
  -15
   
  RS 300
  965
  4516
  0.213703704
  -884
  -15
   
  Fireball
  955
  4469
  0.213703704
  -931
  -16
   
  RS 400
  939
  4394
  0.213703704
  -1006
  -17
   
  ISO
  922
  4314
  0.213703704
  -1086
  -18
   
  Laser
  4000
  920
  4305
  0.213703704
  -1095
  -18
   
  RS 600
  917
  4291
  0.213703704
  -1109
  -18
   
  International
  Canoe OD
  905
  4235
  0.213703704
  -1165
  -19
   
  29er
  895
  4188
  0.213703704
  -1212
  -20
   
  B14
  853
  3992
  0.213703704
  -1408
  -23
   
  Musto
  Skiff
  837
  3917
  0.213703704
  -1483
  -25
   
  RS 800
  799
  3739
  0.213703704
  -1661
  -28
   
  Waszp
  570
  2667
  0.213703704
  -2733
  -46