video for embedding at scitech.quickfound.net "Depicts the aerodynamic theory and principles of forces acting on air foils. War Department training film TF1-161 Public domain film from the National Archives slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild noise reduction applied. part 1: www.youtube.com from Wikipedia: en.wikipedia.org Aerodynamics is a branch of dynamics concerned with studying the motion of air, particularly when it interacts with a moving object. Aerodynamics is a subfield of fluid dynamics and gas dynamics, with much theory shared between them. Aerodynamics is often used synonymously with gas dynamics, with the difference being that gas dynamics applies to all gases. Understanding the motion of air (often called a flow field) around an object enables the calculation of forces and moments acting on the object. Typical properties calculated for a flow field include velocity, pressure, density and temperature as a function of position and time. By defining a control volume around the flow field, equations for the conservation of mass, momentum, and energy can be defined and used to solve for the properties. The use of aerodynamics through mathematical analysis, empirical approximations, wind tunnel experimentation, and computer simulations form the scientific basis for heavier-than-air flight. Aerodynamic problems can be classified according to the flow environment. External aerodynamics is the study of flow around solid ...
More on this programme: www.bbc.co.uk Kinetic sculptor and artist Theo Jansen builds 'strandbeests' from yellow plastic tubing that is readily available in his native Holland. The graceful creatures evolve over time as Theo adapts their designs to harness the wind more efficiently. They are powered only by the wind and even store some of the wind's energy in plastic bottle 'stomachs' to be used when there is no wind.
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