Wind-tunnel tests on model wing with Fowler flap and specially developed leading-edge slot
This is a 1933 NASA technical report of wind-tunnel tests on a model wing fitted with a Fowler flap and a specially developed leading-edge slot, issued for aeronautical engineers and researchers. The first picture is a diagram of slot and flap positions plotted against percent of chord with curves of lift coefficient, and the second is a dense set of characteristic curves for wings with variable slots, with lift, drag and centre-of-pressure lines plotted against angle of attack; a designer could take from them the clean, labelled technical graph style and the dense multi-line plotting.
