Fig. 7. Comparison of predicted and measured lateral forces. Graphs to the left (A and C) show mean measured lateral forces (dark gray line) ±1 S.D. (light gray fill) of measured forces (the same data as in Fig. 5A; N=11) and the mean (solid black line) ±1 S.D. (dotted black line) of predicted lateral forces for the same 11 larvae. Graphs on the right (B and D) present the same data, but the measured forces are plotted against predicted forces for each instant of time in the tail-beat cycle. Points vary in color from blue to red as the tail-beat cycle progresses. The green regression line was calculated by a least-squares solution to a linear curve fit of the data (slope=0.32, y-intercept=0, r²=0.50 in B; slope=0.13, y-intercept=0, r²=0.05 in D). The gray line has a slope of 1, which represents a perfect match between measured and predicted data. (A,B) The forces predicted for the lateral force by the quasi-steady model compared with measurements. (C,D) The forces predicted for the lateral force by the unsteady model compared with measurements.

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