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WE publish this month an interesting article by MR. T. H. DAY ingeniously drawing attention to a striking analogy between the system of forces acting on an airscrew and on a directacting engine. The diagrams he has prepared certainly produce strong evidence in proof of this similarity to which,...
IT can be shown that a close analogy exists between the system of forces acting on the blades of an airscrew and on a directacting engine.
THE marked dependence of the strength of metals on temperature, and on rate of loading at high temperatures, can be explained by assuming that above the equicohesive temperature rupture takes place by plastic flow in a nonhomogeneous medium, consisting of rigid crystallites weakly cemented...
IN the previous article, the lateral stability of an aircraft was shown to depend upon the roots of a quartic equation in which the coefficients were obtained in terms of the resistance derivatives of the aeroplane. These derivatives were defined in a highly synthetic manner from a mathematical...
THE steady increase in speed and use of thin aerofoils compels a deeper consideration of the problem of oscillation. In recent years there has been a tendency to the building of large aeroplanes. This is closely connected with the problem of oscillation. The author in a first approximation tries...
DEAR SIR, I have read with interest the article Fluid Flow through Restrictions by L. S. Greenland, published in the June issue of your journal, but feel obliged to comment on two things.
UNDER the heading of Statistical Control, we are faced with several terms which are still in their infancy as regards scope and definition.
INTEREST has been aroused by articles which have recently appeared in the technical press and elsewhere on the use of infrared radiation for industrial processes requiring heat.
THROUGHOUT the summer and early autumn, small piles of white bore dust on the surface of the bark of ash, English or imported, are a common sight in timber yards and dispersal sites. As the Forest Products Research Laboratory receives a number of inquiries every year on this type of insect...
A Pitotstatic tube structure comprising, in combination, a shell having a hollow protuberance thereon, said shell having a dynamic pressure opening at the front end and a static opening at the side thereof a partition in said shell separating an interior portion of said protuberance from the...
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