Paper: An Analysis of an Article in the Journal The Dynamics of Flight-Initiating Jumps in the Common Vampire Bat Desmondus Rotundus by William A. Schutt Jr., J. Scott Altenbach, Young Hui Chang, Dennis M. Cullinane, John W. Hermanson, Farouk Muradali and John E

The prediction that was made for this experiment was that this experiment would follow the results that were observed by Altenbach in 1979, and 1988. That is, that the bat would indeed initiate its flight with a jump. The tests that were imposed were the use of a force platform with twelve transducing elements. There were two horizontally oriented aluminum box beams holding up the platform. Short vertical beams at the end of each box beam attached to the supporting baseplate of the platform. An aluminum plate was glued to a honeycomb shaped piece of plastic. The platform was calibrated by using the methods outlined in Biewener and Full (1992). The platform's vertical and horizontal channels were calibrated to individually hold up to 10 N which equates to approximately 30 times the animal's weight. The platform was then used to calculate the animal's force that was exerted when jumping in order to initiate flight. The data that was collected was that the Desmodus rotundus was able to, and consistently exerted a force of up to 9.5 times its weight in about 30ms while in the process of jumping. The average take off velocity was 2.38ms-1. It was determined that the jump sequence can be divided into three major phases, preparatory, jump and flight. Desmodus rotundus also consistently engages in a preparatory phase that includes a slight crouch before the actual jump. In evaluating this experiment it is very clear that the results support the hypothesis. By testing the force exerted by the wings of Desmodus rotundus we can be aware of the power that they are capable of and in realizing that, it justifies the many uses of the wings. When comparing the hypothesis with the results we also find that the dynamics of flight that were proposed in the hypothesis were consistent with the actual experiment....