Abstract
Solutions of non-linear partial differential equations are necessary for the calculation of unsteady aerodynamic forces produced by flying animals. There is a new aerodynamic concept (Send 1989) which could solve the unsteady problems of insect flight. According to this concept, nine kinematic parameters of a single wing are aerodynamically important. We will present our way to analyse the kinematic parameters of locust flight.
The flight system of locusts (Schistocerca gregaria) integrates several feedbacks inside and outside the animal. When a locust is fastened to any support, outside feedbacks are normally opened. Visual (outside) feedbacks can be closed by means of flight simulators. In roll manoeuvres of locusts performed in slow and fast flight simulators, long flight sequences occured with tonic responses to visual stimuli. But the locusts were able to change between tonic and phasic responses if they had no success with their current intention. Locusts with very stereotype wing-beat performed random flight behaviour too. With slow simulators, the reaction time was always of several seconds. With a quick simulator, the reaction time was less than 0.1 s.
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Zarnack, W., Reuse, G., Schwenne, T. (1990). Flight Manoeuvres of Locusts. In: Alt, W., Hoffmann, G. (eds) Biological Motion. Lecture Notes in Biomathematics, vol 89. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-51664-1_16
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DOI: https://doi.org/10.1007/978-3-642-51664-1_16
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