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Plasticity: Theory and Application. A. Mendelson. Collier-Macmillan, London. 360 pp. Illustrated. 120s. 可塑性:理论与应用。答:门德尔松。Collier-Macmillan，伦敦。360页。
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1968-10-01 DOI: 10.1017/S0001924000085298
R. Hill
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引用次数: 10
The Second Century Papers: Looking Ahead in Aeronautics—10 二世纪论文:展望航空科学- 10
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1968-10-01 DOI: 10.1017/S0001924000085213
G. Melvill Jones
{"title":"The Second Century Papers: Looking Ahead in Aeronautics—10","authors":"G. Melvill Jones","doi":"10.1017/S0001924000085213","DOIUrl":"https://doi.org/10.1017/S0001924000085213","url":null,"abstract":"In the first contribution to “Looking Ahead in Aeronautics” Dr. Küchemann writes “The task of viewing the prospects over a whole century may be regarded as being at once impossible, presumptuous and not without a touch of the absurd”, which lies close to the first response of the present author. But on reflection, the very impossibility of reliable prediction a century ahead surely stands to change the tune somewhat. Over this large time-scale, bold flights of fancy into the unknown must take equal place with cautious realism and an author may presume to feel released from some at least of his usual conditioned restraints. In turn, yielding of constraint strengthens the writer's arm, until, not without a certain sense of trepidation, one is at length tempted to plunge into the guessing pool along with a goodly company of fellow men.","PeriodicalId":50846,"journal":{"name":"Aeronautical Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"1968-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S0001924000085213","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57255109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Increased Piloting Tasks and Performance of X-15A-2 in Hypersonic Flight X-15A-2高超声速飞行中增加的驾驶任务和性能
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1968-09-01 DOI: 10.1017/S0001924000085092
WM. J. “Pete” Knight
{"title":"Increased Piloting Tasks and Performance of X-15A-2 in Hypersonic Flight","authors":"WM. J. “Pete” Knight","doi":"10.1017/S0001924000085092","DOIUrl":"https://doi.org/10.1017/S0001924000085092","url":null,"abstract":"In past years, flying a basic X-15 from launch through a dead stick landing on a precise speed and altitude profile was considered a demanding piloting task. The success of each mission was determined by the pilot's ability to perform under the physiological and psychological stresses of flight into a hostile flight environment of high Mach numbers, high accelerations, high altitude, and limiting temperatures. Today the aircraft has been extensively modified to qualify the X-15 as a test bed vehicle for a ramjet engine, which will be carried in place of the movable ventral, providing real time flight environment for testing and developing an operational prototype ramjet for use on future hypersonic cruise vehicles. The additional systems pictured in Fig. 1 (external tanks, ramjet, external window, and ablative coating), their associated emergency procedures and the degraded flying characteristics of the X-15A-2 have increased the pilot's workload significantly over the standard X-15 mission.","PeriodicalId":50846,"journal":{"name":"Aeronautical Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"1968-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S0001924000085092","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57254986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reliability and Utilisation of Flight Simulators 飞行模拟器的可靠性和利用
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1968-01-01 DOI: 10.1017/S0001924000083482
G. J. de Wit
{"title":"Reliability and Utilisation of Flight Simulators","authors":"G. J. de Wit","doi":"10.1017/S0001924000083482","DOIUrl":"https://doi.org/10.1017/S0001924000083482","url":null,"abstract":"Some approaches are indicated for determining, and if necessary raising, the potential utilisation of training equipment, the objectives being: —to reduce costs; —to avoid or defer new capital investments; —to secure more flexible rostering through increased availability. The problem is approached from a systems standpoint. The investigation has been mainly confined to Link equipment, but the solution can be utilised for all auxiliary equipment, e.g. radar, where failures occur during or outside the use phase. Visual aids and pure flight aspects such as motion are not taken into consideration.","PeriodicalId":50846,"journal":{"name":"Aeronautical Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S0001924000083482","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57254971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Cowl Shapes of Minimum Drag in Supersonic Flow 超声速流动中最小阻力的冷罩形状
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1965-01-01 DOI: 10.1017/S000192400006067X
E. Angus Boyd
{"title":"Cowl Shapes of Minimum Drag in Supersonic Flow","authors":"E. Angus Boyd","doi":"10.1017/S000192400006067X","DOIUrl":"https://doi.org/10.1017/S000192400006067X","url":null,"abstract":"Guderley, Armitage and Valentine have computed the inlet and closed body contours which form the forepart of an axially symmetric body, of given length and fineness ratio, having minimum pressure drag. The solution is not based on a simplified pressure law, such as the Newtonian impact law, because by a suitable choice of control surface for mass flow and momentum they are able to employ the general flow equations. It is clear, however, from an analysis of their tabulated results that their cowl shapes fall on a single curve for a given value of Δ=didt, the ratio of the initial to the final diameter of the cowl, when plotted in terms of a dimensionless length ξ=x/l and thickness η=y/dt, as in Fig. 1. Furthermore Fig. 1 shows that, except for small values of Δ, the Guderley shapes are indistinguishable from the optimum shapes calculated from Newtonian impact theory. The shape and characteristics of the Newtonian duct of given length and thickness, offering minimum drag to the external stream, are derived using the slender-body approximation. Ducts for which Δ > 0.04 are shown to be sufficiently slender. The slopes of those with 0 ≤ Δ < 0.04 are too large only in a small critical region near the nose. Thus slender body theory will give a close approximation to the exact Newtonian solution even in these cases. For the larger values of Δ likely to be used in practice slender body theory is valid everywhere.","PeriodicalId":50846,"journal":{"name":"Aeronautical Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"1965-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S000192400006067X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57254770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Bending of Elastically Restrained Rectangular Plates Under Uniform Pressure 均匀压力下弹性约束矩形板的弯曲
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1958-11-01 DOI: 10.1017/S0368393100070085
C. Lakshmi Kantham
{"title":"Bending of Elastically Restrained Rectangular Plates Under Uniform Pressure","authors":"C. Lakshmi Kantham","doi":"10.1017/S0368393100070085","DOIUrl":"https://doi.org/10.1017/S0368393100070085","url":null,"abstract":"In the bending and vibration of plates it is found that the values of maximum deflection and natural frequencies, respectively, vary considerably from the simply-supported to clamped edge conditions. For an estimation of these characteristics in the intermediate range a generalised boundary condition may be assumed, of which the simply-supported and clamped edges become limiting cases. While Bassali considers the ratio of edge moment to the cross-wise moment as a constant, Newmark, Lurie and Klein and other investigators, in their analyses of various structures, consider that moment and slope at an end are proportional. Here the definition of elastic restraint as given by Timoshenko, α=βM, is followed, where α is the slope at any edge, M the corresponding edge moment per unit length while β is the elastic restraint factor. β→0 and β→∞ represent the two limiting cases of simply-supported and clamped edge conditions.","PeriodicalId":50846,"journal":{"name":"Aeronautical Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"1958-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S0368393100070085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56961958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Sources on Invention. John Jewkes, David Sawers, Richard Stillerman. MacMillan a Co., London, 1958. 428 pp. 31s. 6d. 发明的来源。约翰·朱克斯，大卫·索厄斯，理查德·斯蒂尔曼。麦克米伦公司，伦敦，1958。428页，31页。6 d。
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1958-03-01 DOI: 10.1017/S0368393100068450
J. Pritchard
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引用次数: 0
Safety and Large Aircraft 安全与大型飞机
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1958-01-01 DOI: 10.1017/S0368393100098072
J. Laurence pritchard
{"title":"Safety and Large Aircraft","authors":"J. Laurence pritchard","doi":"10.1017/S0368393100098072","DOIUrl":"https://doi.org/10.1017/S0368393100098072","url":null,"abstract":"","PeriodicalId":50846,"journal":{"name":"Aeronautical Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"1958-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S0368393100098072","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56962716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mission Completed . By Air Chief Marshal Sir Basil Embry. 350 pp. Methuen. 25s. 任务完成。空军元帅巴兹尔·恩布里(Sir Basil Embry)著，350页。
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1957-08-01 DOI: 10.1017/S0368393100130457
E. Shepherd
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引用次数: 0
The Dawn of Aerodynamics 空气动力学的曙光
IF 1.4 4区 工程技术
Aeronautical Journal Pub Date : 1957-03-01 DOI: 10.1017/S0368393100128809
J. Laurence pritchard
{"title":"The Dawn of Aerodynamics","authors":"J. Laurence pritchard","doi":"10.1017/S0368393100128809","DOIUrl":"https://doi.org/10.1017/S0368393100128809","url":null,"abstract":"As individuals, those who have been born and bred and nurtured in the long, unique and formative tradition of the British people may justly claim a pride in their scientific and technical achievements over the years which cannot be claimed in such measure by any other nation. It is a claim they can make as proudly this very day as they could have done over the past three hundred years. In the main, this paper is concerned with but a small, although not unimportant, part of the scientific achievement of the Seventeenth, Eighteenth and Nineteenth centuries. It was a period, in Great Britain, of such giants as Isaac Newton, James Watt, John Dalton, Robert Boyle, Henry Cavendish, Michael Faraday, Charles Darwin, Clerk Maxwell, W. J. M. Rankine, Lord Kelvin, Lord Rayleigh, Sir Charles Parsons, Prescott Joule, C. G. Stokes, Osborne Reynolds, Sir J. J. Thomson, C. Babbage, F. W. Lanchester, and so many others whose ideas and achievements have changed the face of the world in this Twentieth century of application.","PeriodicalId":50846,"journal":{"name":"Aeronautical Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"1957-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1017/S0368393100128809","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56963193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
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