• sci-vortex-crop
    NASA wake vortex study at Wallops Islands NASA Langley Research Center, May, 1990
  • sci-tip-vortex-1
    Diagram showing tip vortex, by Don Garlick.
  • sci-vortex-diagram
    Diagram showing tip vorteces, by Don Garlick
  • sci-tip-separation-graph
    Diagram of tip separation to wing span of pink footed geese, by Don Garlick
  • sci-wing-span-graph
    Graph of drag % relative to solo flight, by Don Garlick.