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WINGS

The Effect of the ribs on the stresses in the spars of a two-spar wing subjected to the most generał type of loading, by D. Williams and Roxbee H. Cox. London, H.M. Stat. off., 1935.

11 p. diagrs. (A.R.C. R. & M. no. 1538)

Experiments on the distortion of a stripped two-spar metal wing unóer torsional loading, by D. Williams and H.F. Vessey. London, H.M. Stat. off., 1933.    16 p. (A.R.C. R. & M.

no. 1571)

On the effect of stiff ribs on the torsional stiffness of aero-plane wings, by H. Roxbee Cox and D. Williams. London,

H.M. Stat. off., 1933. diagrs., tables. (A.R.C. R. & M. no. 1536)

Stresses in monospar bracing, by S.C. Redshaw. Flight, London, Oct. 27, 1932, v. 24, no. 1244, p. 1008a-d. (Abstract Journal of the R.A.S., London, May 1933, p. 447)'

Late developments in airplane stress-analysis methods and their effect on airplane structures, by Richard C. Gazley. S.A.E. Journal, New York, Sep. 1932, v. 31, no. 3, p. 345-55. illus.

Descriptive geometry in structural analysis, by M. Watter. Aero digest, New York, June-July 1932, v. 20-21, no. 6: 1, p. 26-28; 32-34.

Zur genaherten berechnung vielholmig-parallelstegiger, ganz-und halbfreitragender, mittelbar und ummittelbar belasteter flUgelgerippe, von Eugen SSnger. Z.F.M., MUnchen und Berlin, May 14, 1932, v. 23, no. 9, p. 245-50. diagrs. (Abstract Journal of the R.A.S., London, 1933, v. 37, no. 25, p. 80)

Stress calculations in redundant wing structures, by A.E. Russell. Flight, London, Mar. 25, 1932, v. 24, no. 13, p. 260a-e. diagrs., illus. (Abstract Journal of the R.A.S., London,

June 1932, p. 474)

Accurate calculation of multispar cantilever and semi-cantilever wings with parallel webs under direct and indirect loading, by Eugen S&nger. Washington, 1932.    18 p. illus., table.

(N.A.C.A. Technical memoranduns no. 662) diagrs., illus., tables. (From Z.F.M., Berlin, Oct. 26, 1931, v. 22, no. 20, p. 597-603)

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Approximate calculation of inulti-spar wings, by Eugen S&nger.

Washington, 1932.    14 p. illus. (N.A.C.A. Technical memo-

randums no. 680) (From Z.F.M., Berlin, May 14, 1932, v. 23, no. 9, p. 245-50) TAbstract Journal of* the R.A.S., London, Jan. 1933, p. 80)