Causes of Throat clearing: The following medical conditions are some of the possible causes of Throat clearing. There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Habitual throat clearing. 2  Dry throat - see also causes of dry throat.  Anxiety.
Spinning can enhance cardiovascular fitness, and improve muscle tone and exercise endurance. Spinning works various muscle groups, including the quadriceps, hamstrings, calves, hips, and abdominal muscles.
The advertising department used the Roundel and BMW heritage in an attempt to increase sales of the new radial motors. The idea of the spinning propellers was given greater credence in an article by Wilhelm Farrenkopf in a BMW journal of 1942. This also featured an image of an aircraft with a spinning Roundel.