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An experimental and analytical study was conducted at Mach 0.7 to investigate the effects of spanwise curvature on flutter. Two series of rectangular planform wings of aspect ration 1.5 and curvature ranging from zero (uncurved) to 1.04/ft were flutter tested in the NASA Langley Transonic Dynamics Tunnel (TDT). One series consisted of models with a NACA 65 A010 airfoil section and the other of flat plate cross section models. Flutter analyses were conducted for correlation with the experimental results by using structural finite element methods to perform vibration analysis and two aerodynamic theories to obtain unsteady aerodynamic load calculations. The experimental results showed that for one series of models the flutter dynamic pressure increased significantly with curvature while for the other series of models the flutter dynamic pressure decreased with curvature. The flutter analyses, which generally predicted the experimental results, indicated that the difference in behavior of the two series of models was primarily due to differences in their structural properties.

La Voragine es una novela del escritor colombiano Jose Eustasio Rivera, que se publicó en 1924 y se convirtió en un clásico de la narrativa latinoamericana y forma parte del realismo social. Esta novela cuenta la historia de amor del poeta Arturo Cova y Alicia durante su travesía por los llanos orientales de Colombia y la Selva del Amazonas. El trasfondo de esta historia se basa en las viviencias de personajes reales que padecieron durante la dramatica epoca conocida como la fiebre del caucho, donde colonos e indigenas fueron maltratados y esclavizados por terratenientes que vendian este material para las grandes compañías de la industria del caucho para fabricar llantas. Esta explotación ocurrio desde finales del siglo 19 y comienzos del siglo 20. En esta novela los personajes luchan tambien contra la exuberancia de la selva del Amazonas y sus diversos rios y que el autor describe como el desierto verde. (Introducción por MitonFMH).