A thermal system for continuous monitoring of laminar and turbulent boundary-layer flows during routine flight

Norman R. Richardson, Elmer A. Horton
naca-tn-4108
Sep 1957


A thermal system has been developed which could be used to determine whether the boundary layer on a wing in flight is turbulent or laminar. This system, when used in conjunction with continuous recording instruments such as the galvanometer in an NACA VGH recorder and a motor-driven selector switch, would permit continuous monitoring of the boundary layer during routine flight with little or no attention from the crew.

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