Fig. 14. Relationship between horizontal velocity and lateral force during turning in freely manoeuvring Drosophila. Data points for horizontal velocity (A) and lateral force (B) are plotted against flight path radius, whereas relative frequency is shown in pseudo-colour. Graphs show superimposed data derived from all tested flies. (C) Binned means for horizontal velocity (black, left scale) and lateral (centripetal) force (blue, right scale) derived from the data shown in A and B. N=131 flies. Means ± s.d. Radius of the inner cylinder of the arena was 70 mm.