Add fluorescent minitufts to the aerodynamicist's bag of tricks

Recent experience has demonstrated the feasibility of routinely using fluorescent minitufts to visualize low-speed and transonic flows. This extension of the traditional yarn technique permits large numbers of minitufts to be applied to the surfaces of a wind tunnel model, yet produces negligible interference with the flow. Extremely thin fluorescent nylon monofilament (diameter as small as 0.0007 in.) forms the tufts. Small drops of lacquer-type adhesive attach the tufts to the model. Fluorescence photography records the visual data.