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Career Counselor Series: The Power of Mentoring

Alyson Lyon, executive leadership coach, discusses the value of being a mentor and/or a mentee. SAE Members can view the full version by logging into the Member Connection. Not a Member? Join us today at

SAE International Journals Complete Set

This set includes: SAE International Journal of Aerospace March 2010 - Volume 2 Issue 1 SAE International Journal of Commercial Vehicles October 2009 - Volume 2, Issue 1 March 2010 - Volume 2, Issue 2 SAE International Journal of Engines October 2009 - Volume 2, Issue 1 March 2010 - Volume 2, Issue 2 SAE International Journal of Fuels and Lubricants October 2009 - Volume 2, Issue 1 March 2010 - Volume 2, Issue 2 SAE International Journal of Materials and Manufacturing October 2009 - Volume 2, Issue 1 March 2010 - Volume 2, Issue 2 SAE International Journal of Passenger Cars - Electronic and Electrical Systems October 2009 - Volume 2, Issue 1 SAE International Journal of Passenger Cars - Mechanical Systems October 2009 - Volume 2, Issue 1 March 2010 - Volume 2, Issue 2
Technical Paper

Duralumin All-Metal Airplane Construction

PSYCHOLOGY of the public, as well as engineering structure and aerodynamics, is involved in commercial aviation. The public has confidence in metal. With quantity production in view, the author and his associates considered costs of production as related to quantity and also costs of maintenance at airports and in the field, and chose metal as the material of construction. Structural members are fashioned from sheet duralumin rather than from tubes and a type of construction was evolved that can be made with the minimum investment in tools, that is cheap to put together and that can be repaired with the smallest amount of equipment and labor. For compression loads, duralumin has a great deal more strength for a given weight than has steel. It cannot be used, however, for compression members in combination with steel in tension members because of the difference in coefficient of expansion.
Technical Paper


The author states briefly the phenomenal growth of taxicab usage and consequent demand for this type of motor vehicle, mentioned the differences in body requirements for taxicabs as compared with those of passenger cars, and describes the methods used to secure durability in taxicab-body construction to discount the severe service to which the body is subjected. Tabular data are presented and comments made regarding the woods that are suitable for body framework, and the methods of joining frame members and reinforcing frame joints are outlined. The desirable types of roof and the factors that influence design are discussed at some length, illustrations being presented also, and minor considerations, such as types of hardware, dash and instrument-boards, are included. A brief summary states present conditions, and a bibliographical list is appended of informative publications relating to the subject.
Technical Paper

Current Practice in Tractor Bevel Gears

THE design and application of tractor bevel gears is covered in this paper. The authors discuss the problems involved, under the following headings: 1. Basic bevel-gear systems in use, based upon the method of cutting. 2. Method of calculation and selection of factors determining the static and maximum tensile stresses. 3. Summary of static and maximum tensile stresses, and fatigue life analysis. 4. Materials and heat-treatment.
Technical Paper

Why Not 125 BMEP in an L-Head Truck Engine?

HIGH output per cubic inch of piston displacement is desirable not alone for the purpose of being able to transport more payload faster, but more particularly for the invariably associated byproduct of lower specific fuel consumption, and especially at road-load requirements. The only way of accomplishing this purpose is through the use of higher compression ratios, and the limiting factors for this objective are fuel distribution and the operating temperatures of the component parts. A manifold is proposed which not only definitely improves distribution at both full and road loads, but has the inherent additional advantage of reducing the formation of condensate, thus still further facilitating a reduction in road-load specific fuel consumption. Hydraulic valve lifters, obviation of mechanical and thermal distortion, and controlled water flow are the essentials in improved cooling.
Technical Paper

Safety in Body Design Through Chassisless Construction

THE successful development of the chassisless motorcoach and its relation to safety, weight reduction and automotive design are discussed by the author. Pioneer design of this type, made back in 1927 after encountering various difficulties with conventional frames, was followed by successive improvements in design, resulting in the highly developed unit of today. A study is included of the engineering fundamentals primarily involved in the integral or chassisless design versus conventional-frame design from a strength and weight standpoint. This study involves a comparison with other more concrete objects to establish a definite insight to the why and wherefore of these structural changes. The relation to body safety design and its interconnection to weight distribution, vehicle balance, and resistance to crushing are also covered by the author.
Technical Paper

Manufacturing Phases of Metal-Aircraft Construction

THE introduction to this paper includes definitions of the major items under discussion, and is followed by a discussion of the materials most widely used in metal-aircraft construction and their important physical properties. In the remainder of the paper are described some of the problems encountered in metal construction and the processes that have been developed to facilitate manufacture. The following specific items are discussed: (1) Design, (2) Tooling, including lofting, (3) Fabrication, (4) Assembly, (5) Inspection, and (6) Protective coating. Special equipment and tools are illustrated.
Technical Paper

practical design suggestions for users of Brazed Honeycomb Sandwich

SIX BASIC suggestions are offered on how to design for practical, producible, economical structures of brazed honeycomb sandwich. The author illustrates the application of some of these design suggestions and explores the step-by-step theoretical reasoning a designer might use to arrive at a satisfactory design for a hypothetical large missile wing. The final design of a honeycomb sandwich component must take into account the process as well as structural and configuration requirements.
Technical Paper


This paper presents some of the history of the Spacemetal process development; a discussion of the core forming machine, a description of the welder where corrugated core and facing sheets are joined; the quality control process employed for inspecting the finished product; and some of the material properties and applications. FOREWORD Development of a production process and the machines for fabrication of a resistance welded steel sandwich was made by Missile Division, North American Aviation, Inc. Development was carried forward under contract AF 33(600)-26154 from the Manufacturing Methods Branch, Industrial Resources Division of the Air Materiel Command USAF.
Technical Paper

Construction of a Controlled Environmental Area Utilizing Commercial Construction Materials

With the growth of the missile and space industry, the controlled environmental, or clean, room has become an accepted and necessary facility for assembly, test and inspection of critical components. The paper describes the construction of such a facility within an existing manufacturing plant. Emphasis is on the use of readily available, commercial construction materials. The intent is not a manual defining exact procedures and methods of construction and maintenance, but rather a description of the concept of one particular clean room influenced as it was by existent circumstances. Included are areas for hydraulic assembly and test, and Lox cleaning and assembly.
Technical Paper

Scale Model Evaluation of Earthmoving Tools

The problem of accurately evaluating the performance of earthmoving tools has been for many years severely handicapped by the variability of field soils. The machine operator also contributes to the variability of field test data, since he cannot accurately reproduce adjustments of the cutting element on successive tests. Minimizing these two factors has been of prime consideration in the establishment of an indoor scale-model testing facility for earthmoving tools, described here. In addition there is a discussion of the soils used, the testing technique, and the type of test results that can be obtained.
Technical Paper

The Design and Construction of a Controlled Environmental Area for Hydraulic Assembly and Test

This paper describes the construction of a clean room within an existing facility. The description of the details shows that areas capable of close environmental control can be developed from commercial construction materials readily available. Controls for such an area may also be relatively simple and routine, but must be regularly scheduled. Thus, at realistic costs, a facility may be constructed that will be more than adequate for supercritical inspection, assembly, and test operations.
Technical Paper

Modern Manufacturing Methods for Shaped Honeycomb Core

Methods and equipment have been developed to sculpture aluminum honeycomb core. Three special honeycomb mills, hand-step cutting equipment, and a composite tooling material are being utilized to contour machine aluminum honeycomb on a production basis.
Technical Paper

Construction and Earthmoving Equipment Requirements in Vietnam

The engineer troops in Vietnam have had to cope with a number of problems caused by the rapid buildup of troops, the complexity and wide variety of equipment in use, and the resulting high level of skill required of operator and maintenance personnel. This paper describes some of the equipment and procedures developed by USAEDRL for ease of assembly and maintenance, including the sectionalizing of vehicles. The author also outlines maintenance problems encountered in the field, particularly on hydraulic systems and the overall problems of quality control.