Skin-friction measurements have been made on a half-model slender wing of 24 ft root chord at low subsonic speeds. The maximum root-chord Reynolds number was 30 x 10power6. The measurements were made using surface pitot-tubes ...

A comprehensive low-speed experiment on a three-dimensional turbulent boundary layer is described and the results are presented in detail. The flow caused by an obstruction placed in a thick two-dimensional boundary layer ...

The technique consists of forming a surface pitot-tube by placing a small segment of razor blade on the surface with its tapered cutting edge above a static-pressure hole. The effects of limited changes in the razor-blade ...