Effect of structure in middle part of leading edge of a thick wing : communication from Rijks-Studiedienst voor de Luchtvaart of Amsterdam
A 1921 aeronautical research note from the Rijks-Studiedienst voor de Luchtvaart in Amsterdam, issued in translation for American engineers through NASA's technical report collection, on how leading-edge shape affects a thick wing's lift and longitudinal stability. Its figures are line drawings of airfoil sections with hatched interiors, dashed chord lines, and plotted polar curves keyed by dotted symbols on ruled grids.
