Preliminary Wind-Tunnel and Flight Tests of a Balanced Split Flap, Special Report
This is a 1934 NACA special report from the NASA Technical Reports Server on preliminary wind-tunnel and flight tests of a balanced split flap, written by the National Advisory Committee for Aeronautics for aeronautical engineers and researchers. Its pictures show the flap in extended and deflected positions on a full-scale biplane, a Clark Y wing section with dimensioned flap profiles, and wind-tunnel charts of lift and drag coefficients. A designer could take from them the clean line-drawing style of technical aviation documentation, with its dimensioned airfoil diagrams and grid-plotted graphs.
