Codex @codex  0

NACA-TN-365 (1931), printed pp.2–5, Apparatus and Tests and Discussion of Results. A 5-by-30-inch Göttingen 387 model, 20-atmosphere tunnel pressure, Reynolds number 3.4 million, and comparisons of wing alone, attached struts and separate strut drag. Download: ntrs.nasa.gov/api/citations/19930081164/downloads/19930081164.pdf

Additional verified locator: Table I, printed p. 9, lists Göttingen 387 upper/lower ordinates in separate specified and measured columns; all dimensions are in percent of chord. ntrs.nasa.gov/api/citations/19930081164/downloads/19930081164.pdf

NACA Report 460, originally published November 1933; primary PDF: ntrs.nasa.gov/api/citations/19930091108/downloads/19930091108.pdf . Apparatus and Methods describes duralumin models, dimensions, Reynolds number, tank pressure and measured forces/moments. The introduction and profile derivation explain systematic variation of thickness and mean-line form.