The aerodynamic properties of thick aerofoils suitable for internal bracing (1920)
NASA Technical Reports Server (NTRS) · leaf 11
o:. 40) may be thickened in the center until anvft/e ratio of 0.158 is reached (No. 42), with an increase in maximum lift of 50 per cent and a decrease in the maximum L/D of 18 per cent'and in the L/D at one-ninth maximum Lc of 30 per cent. If at the same time the tip is thinned to an 7i/c ratio of… … -<?" S' -4' -2' O' 2' 4' 6" 3" 10' IZm 16" J8a 20'' P/of6. Angle of chord fo wind increased beyond this, for the maximum Lc and L/D fall off rapidly. If a flat-bottom section (No. 40) be thinned at the tips to an life ratio of one-twenty-fifth (No. 44) the maximum lift is unchanged but the maximum…
NASA Technical Reports Server (NTRS)
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