Figure 6
From: On the role of tail in stability and energetic cost of bird flapping flight

Trade-off between CoT and stability. (a) Lower envelope of the CoT as a function of the forward flight velocity of four evenly-spaced \(\beta\)-planes. We report all the possible solutions, from which the lower envelope is extracted, with transparent points, coloured accordingly with the respective tail opening. (b) Pareto front of the CoT as a function of the largest Floquet multiplier of four evenly-spaced \(\beta\)-planes. We report all the possible solutions, from which the Pareto front is extracted, with transparent points, coloured accordingly with the respective tail opening. The stability transition is highlighted with the purple vertical line (Color figure online).