Methods for restoring aerodynamic forces based on the use of measurement data by balance elements and an accelerometer have been expanded. A signal processing method has developed that makes it possible to correct using additional acceleration support elements. Examples application proposed under conditions a pulsed wind tunnel in experiments massive models, both with constant decreasing flow p...

When a baseball travels through the air, it experiences various forces that determine the trajectory. The most familiar of these forces is the downward pull of gravity FG. Less familiar are the aerodynamic forces, namely the drag force FD and the Magnus force FM . The drag force, or in everyday language “air resistance,” is due to the fact that the ball has to push the air out of the way. Rathe...

During flight, the wings of many insects undergo considerable shape changes in spanwise and chordwise directions. We determined the origin of spanwise wing deformation by combining measurements on segmental wing stiffness of the blowfly Calliphora vicina in the ventral and dorsal directions with numerical modelling of instantaneous aerodynamic and inertial forces within the stroke cycle using a...

Analysis of the aerodynamic forces acting on baseball pitches from major league games reveals a large variance in the measured coefficients of lift and drag. We have examined possible explanations for this effect and found that, while uncertainties introduced by measurement error and the method of reporting major league pitch trajectories do explain some of the spread, the reasons for the large...