Form Drag Illustration Comparing Air Flows Around Various Shapes
Form Drag Illustration Comparing Air Flows Around Various Shapes

Image Details

  • Description: The image compares the air flow around the following shapes (all having the same frontal area): a flat plate, a sphere, a sphere with a back fairing, and a sphere inside a streamlined housing. They are ordered from the shape generating the highest form drag (the flat plate) to the lowest. Notice the air flow (i.e. the swirl) around each shape.
  • Source: https://books.google.com/books?id=F4noBAAAQBAJ&lpg=PA1&pg=PT187#v=onepage&q&f=false
  • Source info: Fig. 4-5 of the "Pilot's Handbook of Aeronautical Knowledge" from the Federal Aviation Administration
  • License: Other (Fair Use)