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Some Books Recently Received

Some Books Recently Received AIRCRAF T ENGINEERING March, 1940 Th e Properties of Materials—Lubricants and Lubrication— Manua l of the Luftwaffe—Interavia A.B.C. usual space to the mechanical properties of Strengt h of Materials. By F . V. Warnock. one. The term "straight run " applied to materials, and covers a wide ground there— (Sir Isaac Pitman. 4th edition. 401 pp . lubricating oil distillation on page 361 is almost including plastics—very successfully. The Price 10s. 6d.) meaningless. It is misleading to imply, as on whole book is written with a minimum of page 249, tha t all sulphur compounds must be Propertie s and Strengt h of Materials . By appeal to mathematics, and because of that removed during the refining of lubricating oil. J. A. Cormack and E. R. Andrew. and its generally pleasing style, is unusually I t is very doubtful whether, as stated on page (Macmillan. 383 pp . Price 8s. 6d.) readable. There arc numerous worked examples 124, bearing corrosion is ever due to moisture Having regard to the miscellaneous contents of these and other text books on the same in the text with collected exercises for the in the oil. studen t at the end of each chapter. So much subject, it is remarkabl e how definite a meaning Objection must be taken to th e idea expressed of the subject matter of ordinary " Strength the term " Strength of Materials " has come on page 101 that greases are needed when of Materials "textbook s is covered—at least t o have for engineers of all sorts. And ye t operating conditions are "extremely severe." in an introductory way—that one regrets the wha t a curious title it is for their common Greases are not intrinsically superior to the absence of mention of fixed and continuous stock-in-trade; what have pipes, beams, lubricating oils contained in them, but the beams. The general production of the book shafts and struts, which occupy much space method of application may be such that a fluid is excellent, but many of the diagrams could lubricant is unsuitable. On page 283 it is in such books, to do with the strength of well have been made larger and clearer. incorrectly suggested that water must be materials? But no engineer of to-day—accus­ tomed to the title of his Morley or his eliminated from greases during manufacture. One small point in conclusion. Why do Timoshenko—would wish to make a change. books on this subject continue to inflict upon The author is somewhat contradictory on th e And it seems a matter for regret, therefore, students "equivalent bending moment" and significance of flash point. On pages 128 and tha t the new book by Cormack and Andrew "equivalen t torque" formulas for circular 362 he indicates, quite soundly in th e reviewer's departs somewhat from custom by adding the shafts in combined bending and torsion ? Both opinion, that flash point has no direct bearing word "Properties," particularly as this might of the textbooks under review include the usual on the performance of a lubricant, but on page be taken to imply properties other than the discussion of combined stresses and therefore 362 he makes the questionable statement that mechanical ones primarily intended. need never have added the extra steps leading oils of the highest Hash point deposit the least The first of these books, originally published to these two formulæ, which by their irrational carbon, and on page 431 he thinks that low in 1927, is now in its fourth edition, which form confuse so many students. flash point accompanies high consumption of incorporates a few minor additions and im­ A. G. P . lubricant in internal combustion engines. provements ; the second is a newcomer with The production and printing of the book arc a character of its own that reflects modern Lubricants and Lubrication. By James excellent and the only typographical error conditions in technical education. And both 1.Clower. (McGraw-Hill. 33s.) noted is on page 252 where "soluble content" are good value for the money. This book is, according to the preface, is written for "insoluble content." The cost, Professor Warnock's book is writte n primarily intended for buyers, sellers and users of however, is high for a book of its type. for engineering students working for university lubricants and for designers and operators of C. H. B. degrees, and covers the ground ordinarily re­ machinery. It gives a brief outline of the quired for this purpose. It is notable for the production of petroleum and th e product s made Flugzeug-Leichtmetallbau . By Dr. Karl number of worked examples in its text and therefrom, including lubricants and their test­ Krieger. (M. Matthiesen & Co., Berlin. th e collections of past examination questions ing and application. Doubtless the book Rm. 4.20.) a t the end of each chapter. Its chapters on contains much useful information for buyers This manua l has been written for th e technical beams include a particularly clear and full and sellers and those who are normally not instruction of the German Air Force, but forms exposition of the constructio n of shear force and concerned with the technical side of th e subject, a first-class textbook for the general use of bending moment diagrams, and of the use of bu t for technicians the book contains little that everybody concerned with the manufacture of th e latter for the direct calculation of deflec­ is not covered more adequately elsewhere. light alloy parts. Besides, the designer may tions. A really full treatment of shear force Nearly half the space in th e book is occupied also find valuable hints in this book. and bending moment diagrams has always with the applications of lubricants and the dis­ The chapters refer to materials (specifications, seemed to the reviewer a necessity for most cussion of lubrication systems and machinery. practical methods for distinguishing one light students, and the bending moment diagram No information, however, is given on the use of alloy from another, storage, etc.), tools and deflection method, though so useful, is too lubricants in rolling mills, metal working and machine tools, working methods (cutting, beat­ often omitted or scamped It seems a pity cutting, wire ropes and clocks—to mention a ing, wheeling, pressing, squeezing, folding) gas tha t in this new edition the author has not few important applications which come to and electric welding, soldering, riveting (in­ continued on these lines by using the Method mind. Excepting turbine reduction gears, very cluding explosive rivets), surface protection, of Characteristic Points in his chapter on fixed little is said on the subject of gears in general, machining, sheet working, heat treatment, and continuous beams. Books on strength of and the matter of aero-engine lubrication is peculiarities in the handling of the different materials would often do well to sacrifice some dealt with by quoting the specifications of two light alloys used for aircraft, handling of drawn of the space devoted to applications of the "typical " lubricants. sections and tubes, workshop methods for Theorem of Three Moments to include this Apart from mention of A.S.T.M. and other the temperature control. The last chapter elegant method, beloved of structural engineers official American tests and specifications, no gives tables for weights and specifications but little known to others. One would have relating to German aircraft light alloys and literature references are given. Amongst minor liked to have seen, too, some reflection in this for standard tests. A. R. W. omissions arc the oxidation temperature, viz., edition of the growing importance of aero­ 341 deg. F., a t which the Indian a test is carried nautical engineering, by the inclusion, for ou t (page 120) ; and th e algebraic statement of Interavi a A.B.C. , 1939. (Interavia, Geneva. example, of a section in the torsion chapter the derivation of viscosity index (page 141). 37s. 6d.) on the Bredt-Batho formula: for tubes, and This amazing work of reference fills us with Here and there some unfortunate expressions by some mention of the buckling problems of verging on misstatement arc employed. For admiration. How it is possible to collect the thin plates and tubes. It is surely time, also, example, certain of the chemical equations on names and addresses of all the firms and tha t English textbooks of this type made some pages 117 and 118 do not gain in clarity by societies connected with aeronautics in all part s mention of Castigliano's strain energy theorems, being unconventional. On page 162 the of the world and keep it constantly up to date and expanded their treatment of torsion in surprising statement that thin film friction is we do no t know, bu t the fact remains that it is other-than-circular-shafts beyond the mere less than fluid friction is supported by an achieved with, so far as we have been able to quotation of unexplained formula! to include erroneous argument. On page 281 "oiliness," judge, complete accuracy. The previous some reference, for example, to the membrane edition has been constantly referred to in the which elsewhere in the book is associated with analogy. editorial office of AIRCRAFT ENGINEERING and reduction in friction, is confused with what is The book by Messrs. Cormack and Andrew, generally known as " extreme pressure " pro­ we have no doubt that this, considerably written with students working for National perties in a lubricant. The phenomenon of thicker, new edition will b e equally useful. It Certificates and professional institution exam­ foaming is described on pages 312 and 431 as is impossible to praise it too highly and no firm inations in mind, is on rather more elementary th e "rapi d absorption of air" ; the definition even remotely connected with the aircraft and practical lines. It gives more than the of chemical stability on page 431 is a n unhappy industry can afford to be without it. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Some Books Recently Received

Aircraft Engineering and Aerospace Technology , Volume 12 (3): 1 – Mar 1, 1940
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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb030617
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Abstract

AIRCRAF T ENGINEERING March, 1940 Th e Properties of Materials—Lubricants and Lubrication— Manua l of the Luftwaffe—Interavia A.B.C. usual space to the mechanical properties of Strengt h of Materials. By F . V. Warnock. one. The term "straight run " applied to materials, and covers a wide ground there— (Sir Isaac Pitman. 4th edition. 401 pp . lubricating oil distillation on page 361 is almost including plastics—very successfully. The Price 10s. 6d.) meaningless. It is misleading to imply, as on whole book is written with a minimum of page 249, tha t all sulphur compounds must be Propertie s and Strengt h of Materials . By appeal to mathematics, and because of that removed during the refining of lubricating oil. J. A. Cormack and E. R. Andrew. and its generally pleasing style, is unusually I t is very doubtful whether, as stated on page (Macmillan. 383 pp . Price 8s. 6d.) readable. There arc numerous worked examples 124, bearing corrosion is ever due to moisture Having regard to the miscellaneous contents of these and other text books on the same in the text with collected exercises for the in the oil. studen t at the end of each chapter. So much subject, it is remarkabl e how definite a meaning Objection must be taken to th e idea expressed of the subject matter of ordinary " Strength the term " Strength of Materials " has come on page 101 that greases are needed when of Materials "textbook s is covered—at least t o have for engineers of all sorts. And ye t operating conditions are "extremely severe." in an introductory way—that one regrets the wha t a curious title it is for their common Greases are not intrinsically superior to the absence of mention of fixed and continuous stock-in-trade; what have pipes, beams, lubricating oils contained in them, but the beams. The general production of the book shafts and struts, which occupy much space method of application may be such that a fluid is excellent, but many of the diagrams could lubricant is unsuitable. On page 283 it is in such books, to do with the strength of well have been made larger and clearer. incorrectly suggested that water must be materials? But no engineer of to-day—accus­ tomed to the title of his Morley or his eliminated from greases during manufacture. One small point in conclusion. Why do Timoshenko—would wish to make a change. books on this subject continue to inflict upon The author is somewhat contradictory on th e And it seems a matter for regret, therefore, students "equivalent bending moment" and significance of flash point. On pages 128 and tha t the new book by Cormack and Andrew "equivalen t torque" formulas for circular 362 he indicates, quite soundly in th e reviewer's departs somewhat from custom by adding the shafts in combined bending and torsion ? Both opinion, that flash point has no direct bearing word "Properties," particularly as this might of the textbooks under review include the usual on the performance of a lubricant, but on page be taken to imply properties other than the discussion of combined stresses and therefore 362 he makes the questionable statement that mechanical ones primarily intended. need never have added the extra steps leading oils of the highest Hash point deposit the least The first of these books, originally published to these two formulæ, which by their irrational carbon, and on page 431 he thinks that low in 1927, is now in its fourth edition, which form confuse so many students. flash point accompanies high consumption of incorporates a few minor additions and im­ A. G. P . lubricant in internal combustion engines. provements ; the second is a newcomer with The production and printing of the book arc a character of its own that reflects modern Lubricants and Lubrication. By James excellent and the only typographical error conditions in technical education. And both 1.Clower. (McGraw-Hill. 33s.) noted is on page 252 where "soluble content" are good value for the money. This book is, according to the preface, is written for "insoluble content." The cost, Professor Warnock's book is writte n primarily intended for buyers, sellers and users of however, is high for a book of its type. for engineering students working for university lubricants and for designers and operators of C. H. B. degrees, and covers the ground ordinarily re­ machinery. It gives a brief outline of the quired for this purpose. It is notable for the production of petroleum and th e product s made Flugzeug-Leichtmetallbau . By Dr. Karl number of worked examples in its text and therefrom, including lubricants and their test­ Krieger. (M. Matthiesen & Co., Berlin. th e collections of past examination questions ing and application. Doubtless the book Rm. 4.20.) a t the end of each chapter. Its chapters on contains much useful information for buyers This manua l has been written for th e technical beams include a particularly clear and full and sellers and those who are normally not instruction of the German Air Force, but forms exposition of the constructio n of shear force and concerned with the technical side of th e subject, a first-class textbook for the general use of bending moment diagrams, and of the use of bu t for technicians the book contains little that everybody concerned with the manufacture of th e latter for the direct calculation of deflec­ is not covered more adequately elsewhere. light alloy parts. Besides, the designer may tions. A really full treatment of shear force Nearly half the space in th e book is occupied also find valuable hints in this book. and bending moment diagrams has always with the applications of lubricants and the dis­ The chapters refer to materials (specifications, seemed to the reviewer a necessity for most cussion of lubrication systems and machinery. practical methods for distinguishing one light students, and the bending moment diagram No information, however, is given on the use of alloy from another, storage, etc.), tools and deflection method, though so useful, is too lubricants in rolling mills, metal working and machine tools, working methods (cutting, beat­ often omitted or scamped It seems a pity cutting, wire ropes and clocks—to mention a ing, wheeling, pressing, squeezing, folding) gas tha t in this new edition the author has not few important applications which come to and electric welding, soldering, riveting (in­ continued on these lines by using the Method mind. Excepting turbine reduction gears, very cluding explosive rivets), surface protection, of Characteristic Points in his chapter on fixed little is said on the subject of gears in general, machining, sheet working, heat treatment, and continuous beams. Books on strength of and the matter of aero-engine lubrication is peculiarities in the handling of the different materials would often do well to sacrifice some dealt with by quoting the specifications of two light alloys used for aircraft, handling of drawn of the space devoted to applications of the "typical " lubricants. sections and tubes, workshop methods for Theorem of Three Moments to include this Apart from mention of A.S.T.M. and other the temperature control. The last chapter elegant method, beloved of structural engineers official American tests and specifications, no gives tables for weights and specifications but little known to others. One would have relating to German aircraft light alloys and literature references are given. Amongst minor liked to have seen, too, some reflection in this for standard tests. A. R. W. omissions arc the oxidation temperature, viz., edition of the growing importance of aero­ 341 deg. F., a t which the Indian a test is carried nautical engineering, by the inclusion, for ou t (page 120) ; and th e algebraic statement of Interavi a A.B.C. , 1939. (Interavia, Geneva. example, of a section in the torsion chapter the derivation of viscosity index (page 141). 37s. 6d.) on the Bredt-Batho formula: for tubes, and This amazing work of reference fills us with Here and there some unfortunate expressions by some mention of the buckling problems of verging on misstatement arc employed. For admiration. How it is possible to collect the thin plates and tubes. It is surely time, also, example, certain of the chemical equations on names and addresses of all the firms and tha t English textbooks of this type made some pages 117 and 118 do not gain in clarity by societies connected with aeronautics in all part s mention of Castigliano's strain energy theorems, being unconventional. On page 162 the of the world and keep it constantly up to date and expanded their treatment of torsion in surprising statement that thin film friction is we do no t know, bu t the fact remains that it is other-than-circular-shafts beyond the mere less than fluid friction is supported by an achieved with, so far as we have been able to quotation of unexplained formula! to include erroneous argument. On page 281 "oiliness," judge, complete accuracy. The previous some reference, for example, to the membrane edition has been constantly referred to in the which elsewhere in the book is associated with analogy. editorial office of AIRCRAFT ENGINEERING and reduction in friction, is confused with what is The book by Messrs. Cormack and Andrew, generally known as " extreme pressure " pro­ we have no doubt that this, considerably written with students working for National perties in a lubricant. The phenomenon of thicker, new edition will b e equally useful. It Certificates and professional institution exam­ foaming is described on pages 312 and 431 as is impossible to praise it too highly and no firm inations in mind, is on rather more elementary th e "rapi d absorption of air" ; the definition even remotely connected with the aircraft and practical lines. It gives more than the of chemical stability on page 431 is a n unhappy industry can afford to be without it.

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Aircraft Engineering and Aerospace Technology – Emerald Publishing

Published: Mar 1, 1940

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