Rolling Thunder
#699Viper 640 · 188 · HYC
905
+3±75
Overall Rank
#699
of 1586
Percentile
Top 44%
of 1586 boats
Rating
905
Confidence
±75
High
Races
21
Recent Form
+5
avg last 5 races
Last raced: Jun 22, 2025
Rating Over Time
1056-264Direct Competitors
Boats Rolling Thunder has raced against most often, with head-to-head finish record.
Race History
21 racesDouble Handed Race
Jun 22, 2025/2 of 7
+3
1056
Viper 640 North American Championship · R10
Dec 15, 2024/13 of 30
-8
1053
Viper 640 North American Championship · R9
Dec 15, 2024/13 of 30
-13
1062
Viper 640 North American Championship · R8
Dec 15, 2024/6 of 30
+49
1075
Viper 640 North American Championship · R6
Dec 14, 2024/13 of 30
-5
1027
Viper 640 North American Championship · R5
Dec 14, 2024/18 of 30
-20
1031
Viper 640 North American Championship · R4
Dec 14, 2024/14 of 30
-21
1051
Viper 640 North American Championship · R7
Dec 13, 2024/11 of 30
+3
1072
Viper 640 North American Championship · R3
Dec 13, 2024/16 of 30
-56
1069
Viper 640 North American Championship · R2
Dec 13, 2024/9 of 30
+18
1125
Viper 640 North American Championship · R1
Dec 13, 2024/10 of 30
-63
1107
HYC Hospice One Design Regatta · R6
Apr 10, 2022/2 of 6
-2
1170
HYC Hospice One Design Regatta · R5
Apr 10, 2022/4 of 6
-59
1172
HYC Hospice One Design Regatta · R4
Apr 9, 2022/6 of 6
-137
1231
HYC Hospice One Design Regatta · R3
Apr 9, 2022/4 of 6
-36
1368
HYC Hospice One Design Regatta · R2
Apr 9, 2022/1 of 6
+28
1403
HYC Hospice One Design Regatta · R1
Apr 9, 2022/RET
-125
1376
Viper One Design · R4
Oct 30, 2021/1 of 7
+29
1500
Viper One Design · R3
Oct 30, 2021/1 of 7
+53
1472
Viper One Design · R2
Oct 30, 2021/1 of 7
+99
1419
About the Rating
Ratings are computed using Glicko-2, a chess-style system that considers who you beat and who beat you. Winning against higher-rated boats earns more points than beating lower-rated boats.
The overall rank compares this boat to all others across every class. To see how it stacks up within its class, use the “View all Viper 640” link above.
The confidence band (±75) shows how certain we are about this rating. It narrows as more races are completed and widens during periods of inactivity.
The shaded area on the chart represents the 95% confidence interval — the true skill of this boat likely falls within that range.