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Article
Publication date: 1 August 1944

J.L. Beilschmidt

IN an earlier article dealing with the general aspects of clastic distortion phenomena, which appeared in an issue of Aeronautics, mention was made of the various factors which…

Abstract

IN an earlier article dealing with the general aspects of clastic distortion phenomena, which appeared in an issue of Aeronautics, mention was made of the various factors which tend either to promote, or to damp out and eliminate the onset of the aerodynamic inertia elastic vibration phenomena known as flutter, and it was pointed out that in this respect the provision of an adequate measure of rigidity, both as regards to twisting and flexure of the wing or tail surface structure is one of the most effective safeguards against the occurrence of torsional‐flexural flutter.

Details

Aircraft Engineering and Aerospace Technology, vol. 16 no. 8
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 January 1951

M. Ish Horowicz

MOST previous methods for predicting moments of resistance of beams subjected to pure bending beyond the limit of proportionality involve somewhat complicated and cumbersome…

Abstract

MOST previous methods for predicting moments of resistance of beams subjected to pure bending beyond the limit of proportionality involve somewhat complicated and cumbersome calculations and are usually confined to specific materials and cross‐sections.

Details

Aircraft Engineering and Aerospace Technology, vol. 23 no. 1
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 March 1936

J.L. Beilschmidt

THE force couples, including moments due to inertia masses, which acting at different points on a crankshaft cause an elastic distortion, as a result of which points disposed in…

Abstract

THE force couples, including moments due to inertia masses, which acting at different points on a crankshaft cause an elastic distortion, as a result of which points disposed in the axial plane are subject to an angular displacement in relation to one another in the form of a phase advance and retard movement, and it follows that each will possess a different degree of cyclic variation.

Details

Aircraft Engineering and Aerospace Technology, vol. 8 no. 3
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 July 1936

J.L. Beilschmidt

AN outstanding feature relevant to the consideration of shaft whip phenomena is that intermediate bearings cannot be depended upon to eliminate whip by reducing the free shaft…

Abstract

AN outstanding feature relevant to the consideration of shaft whip phenomena is that intermediate bearings cannot be depended upon to eliminate whip by reducing the free shaft length, for under these conditions the forces tending to produce whip are still present and are transmitted to the bearings in the form of shocks which are likely to coincide with the maximum inertia load positions and result in overloading. Apart from this, an absolutely rigid bearing supporting structure is a practical impossibility (even if it were desirable) and flexing of the shaft is inevitably communicated to the structure so that if this be excessive, vibration, fatigue and rapid general deterioration must result.

Details

Aircraft Engineering and Aerospace Technology, vol. 8 no. 7
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 March 1944

J.L. Beilschmidt

A FEATURE of many of the light alloys now in common use is that the stress and strain curve often does not evidence any well defined region in which the elastic strain becomes…

Abstract

A FEATURE of many of the light alloys now in common use is that the stress and strain curve often does not evidence any well defined region in which the elastic strain becomes plastic strain, and a linear portion of the diagram from the origin, which in the case of so many metals represents a region of proportionality, is sometimes almost non‐existent, the diagram being curved right from the origin so that it is not possible to define any region or limit of proportionality, and the proof stress; by standard definition, has accordingly a relatively low value compared with the ultimate tensile stress of the alloy concerned. (Fig. 1).

Details

Aircraft Engineering and Aerospace Technology, vol. 16 no. 3
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 March 1936

THIS issue of AIRCRAFT ENGINEERING might without excess of exaggeration almost be described as a special number for inspectors and ground engineers—for, indeed, that elusive…

Abstract

THIS issue of AIRCRAFT ENGINEERING might without excess of exaggeration almost be described as a special number for inspectors and ground engineers—for, indeed, that elusive individual, to whom we have on occasion referred before, the “practical man.”

Details

Aircraft Engineering and Aerospace Technology, vol. 8 no. 3
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 July 1947

S.S. Gill

THE article derives expressions for the position of the neutral axis and the failing moment of resistance of symmetrical and unsymmetrical I‐sections and channel sections, angles…

Abstract

THE article derives expressions for the position of the neutral axis and the failing moment of resistance of symmetrical and unsymmetrical I‐sections and channel sections, angles, solid circular sections and thick and thin tubes for materials for which the stress‐strain curve is non‐linear and is different in tension and compression.

Details

Aircraft Engineering and Aerospace Technology, vol. 19 no. 7
Type: Research Article
ISSN: 0002-2667

Article
Publication date: 1 August 2001

Jorge Marx‐Gómez and Claus Rautenstrauch

This study describes the preparation of an eco‐balance to document the materials and energy which are part of the beer production process of the Hasseröder Brewery Ltd. A general…

1366

Abstract

This study describes the preparation of an eco‐balance to document the materials and energy which are part of the beer production process of the Hasseröder Brewery Ltd. A general introduction to eco‐balances and material flow networks is followed by the description of the concrete case study. The modelling of material flows and the derivation of eco‐balances is illustrated with the help of a selected process from beer production. Finally, the possibilities and limitations of the balance evaluation is discussed with the aid of performance measurement systems. The article closes with a preview of future studies.

Details

Environmental Management and Health, vol. 12 no. 3
Type: Research Article
ISSN: 0956-6163

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