Stability in aviation : an introduction to dynamical stability as applied to the motions of aeroplanes (1911)
Bryan, George Hartley, 1864-1928 · London : Macmillan · leaf 118
the origin (Fig. 27), r] its inclination to the line of fiiglit, the conditions of equilibrium become, with the usual notation KU-^'ES'^'^ = W sin d + Hcostj KXP^S'ti = W cos 6 + H sin rj KU-^xS'fix = - Hh (101) In practice the angles 6 and t] will be small, and from the first equation it is… … Fig. 27. be put equal to unity. This is equivalent to assuming either that »? = 0, or that even if tj is not zero, the corrections discussed in 8 54 are neoiio-ible. The third equation shows, as stated above, that the system cannot be replaced by an equivalent system with both Xi = 0 and fx., = 0.…
Stability of aeroplanes
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