Table 4. Summary of performance data.
CB, BT and Cp indicate cutback, bottom turn, and power coefficients, respectively. Yaw, roll and pitch rotation rates are calculated from their angles divided by duration. Mean wave power, rotational powers, power coefficients and total power over inertia are calculated using Eqs 1, 3, 5 and 6, respectively. Trace CB power and CB speed were measured by the TraceUpTM datalogger. Raw data is found in S3 File.
Participant | Fins | ||||||
---|---|---|---|---|---|---|---|
Performance means | 1 | 2 | 3 | 4 (WCT) | Control | RW | p-value |
Trace CB power | 2.6±0.1 | 4.8±0.5 | 5.2±0.2 | 6.0±0.3 | 4.0±0.2 | 4.0±0.2 | 0.625 |
CB speed (m/s) | 5.7±0.1 | 7.4±0.3 | 6.8±0.1 | 6.9±0.2 | 6.4±0.1 | 6.3±0.1 | 0.873 |
CB yaw rate (rad/s) | 2.2±0.1 | 2.8±0.2 | 3.0±0.1 | 3.2±0.1 | 2.6±0.1 | 2.7±0.1 | 0.143 |
CB roll rate (rad/s) | 0.9±0.03 | 1.3±0.1 | 1.3±0.1 | 1.4±0.1 | 1.1±0.04 | 1.1±0.05 | 0.094 |
CB pitch rate (rad/s) | 0.6±0.03 | 0.8±0.1 | 0.8±0.04 | 0.9±0.1 | 0.7±0.03 | 0.7±0.04 | 0.005 |
CB yaw power (W) | 70±5 | 164±34 | 222±19 | 228±37 | 140±14 | 163±17 | 0.035 |
CB roll power (W) | 14±2 | 43±13 | 47±5 | 80±26 | 28±3 | 36±5 | 0.011 |
CB pitch power (W) | 7±1 | 18±6 | 23±4 | 31±9 | 13±2 | 18±4 | 0.005 |
Cp CB | 0.09±0.01 | 0.09±0.02 | 0.13±0.01 | 0.15±0.02 | 0.11±0.01 | 0.12±0.01 | 0.042 |
BT initial speed (m/s) | 6.2±0.1 | 8.8±0.3 | 7.7±0.2 | 7.4±0.2 | 7.1±0.1 | 7.1±0.1 | 0.512 |
BT yaw rate (rad/s) | 1.7±0.05 | 1.7±0.1 | 1.9±0.1 | 1.9±0.1 | 1.8±0.05 | 1.8±0.06 | 0.631 |
BT roll rate (rad/s) | 0.9±0.03 | 0.8±0.1 | 0.9±0.03 | 1.06±0.05 | 0.9±0.03 | 0.9±0.03 | 0.371 |
BT yaw power (W) | 59±4 | 62±9 | 99±6 | 74±6 | 74±4 | 83±6 | 0.023 |
BT roll power (W) | 21±4 | 18±7 | 33±5 | 41±9 | 25±4 | 28±5 | 0.23 |
Cp BT | 0.06±0.003 | 0.03±0.004 | 0.05±0.003 | 0.05±0.004 | 0.05±0.003 | 0.05±0.003 | 0.145 |
Total power (W) | 170±10 | 302±53 | 419±29 | 444±77 | 278±20 | 326±27 | 0.005 |
Total Cp | 0.35±0.02 | 0.30±0.05 | 0.43±0.03 | 0.45±0.05 | 0.37±0.02 | 0.40±0.03 | 0.076 |
Total Power / Inertia (s-3) | 8.3±0.5 | 10.6±1.9 | 13.6±0.9 | 17.1±3.0 | 10.5±0.7 | 11.7±0.9 | 0.026 |