Approximations for column effect in airplane wing spars (1927)
NASA Technical Reports Server (NTRS) · leaf 7
the column effect becomes increasingly important. The writer has made it 0 ./ .2 .3 .4 .5 .6 .7 .8 .3 P/Pe FlO. 3 a practice to allow for this shift empirically by basing the Euler load in the Perry formula neither on I nor V, but on a fictitious length l' + n(l — I'). The coefficient n is, of… … 0 10 20 30 40 50 % Overhang F:g. 4 The Perry formula correction factors have been calculated on that basis, and the ratio of the correct maximum bending moment in the bay to that approximately determined by the formula is plotted in Figure 5. The 40 per cent overhang has been omitted in both cases,…
NASA Technical Reports Server (NTRS)
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