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Can you become a visionary or are you born one? How does a visionary capture an opportunity and makes it a successful business? Are engineers more qualified to solve technical problems or run companies? SAE's "The Visionary's Take" addresses these and many other questions, by talking directly with those who have dared to tackle difficult engineering problems, and create real-life products out of their experience. In these short episodes, Sanjiv Singh and Lyle Chamberlain, respectively CEO and Chief Engineer from Near Earth Autonomy, talk about their experience in creating a brand-new company in the UAV world. Founded in 2011, Near Earth Autonomy brought together a group of engineers and roboticists, looking for unconventional solutions to very hard logistics problems, presenting danger to human life. The answers were developed by pushing technology to a higher level, testing quickly and often, and keeping an open mind to alternative ways of framing engineering challenges.

Can you become a visionary or are you born one? How does a visionary capture an opportunity and makes it a successful business? Are engineers more qualified to solve technical problems or run companies? SAE's "The Visionary's Take" addresses these and many other questions, by talking directly with those who have dared to tackle difficult engineering problems, and create real-life products out of their experience. In these short episodes, Sanjiv Singh and Lyle Chamberlain, respectively CEO and Chief Engineer from Near Earth Autonomy, talk about their experience in creating a brand-new company in the UAV world. Founded in 2011, Near Earth Autonomy brought together a group of engineers and roboticists, looking for unconventional solutions to very hard logistics problems, presenting danger to human life. The answers were developed by pushing technology to a higher level, testing quickly and often, and keeping an open mind to alternative ways of framing engineering challenges.

Creating a 3-dimensional environment using imagery from small unmanned aerial systems (sUAS, or unmanned aerial vehicles -UAVs, or colloquially, drones) has grown in popularity recently in accident reconstruction. In this process, ground control points are placed at an accident scene and an sUAS is flown over an accident site and a series of overlapping, high resolution images are taken of the site. Those images and ground control points are then loaded onto a computer and processed using photogrammetric software to create a 3-dimensional point cloud or mesh of the site, which then can be used as a tool for recreating an accident scene. Many software packages have been created to perform these tasks, and in this paper, the authors examine RealityCapture, a newer photogrammetric software, to evaluate its accuracy for the use in accident reconstruction. It is the authors’ experience that RealityCapture may at times produce point clouds with less noise that other software packages.

Large helicopters are being used for many types of construction work in the United States. Some of the helicopters that are used for this work and their operational problems are described in detail. Examples of jobs done for the air conditioning companies, electric utilities, ski lifts, and structural steel contractors are given. With proper planning and design and with much larger helicopters coming on the market soon, a tremendous increase in construction by helicopter will take place.

The basic electromagnetic shielding of conventional riveted aluminum aircraft construction provides inherent protection to the aircraft systems and occupants against the hazards of lightning discharges. The increased use of adhesively bonded construction techniques on structures of future aircraft indicates a potential reduction in the basic electrical continuity of the airframe. The significance of the conductivity reduction on aircraft lightning protection will be evaluated for various proposed construction techniques, including: bonded honeycomb skin panels, bonded skin joints, bonded basic structure, and different types of monocoque construction. The discussion examines related problems that have been encountered in designing protection for aluminum aircraft.

This paper will discuss how the selection and specification of a motor fuel delivery truck or tractor/trailer can effect the safety of transporting, loading and unloading fuel. During these processes, several circumstances present themselves which could lead to explosion and fire. Ignition sources and component selections which minimize the danger posed by these ignition sources will be discussed. This paper applies to all MC-306 tank trucks and trailers, aircraft refueling tracks, and mobile dispensing carts using hydrant fueling systems (See Appendix 1).

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Spur gear surface endurance tests were conducted to investigate CBN ground AISI 9310 spur gears for use in aircraft applications, to determine their endurance characteristics and to compare the results with the endurance of standard vitreous ground AISI 9310 spur gears. Tests were conducted with VIM-VAR AISI 9310 carburized and hardened gears that were finish ground with either CBN or vitreous grinding methods. Test conditions were an inlet oil temperature of 320 K (116 °F), an outlet oil temperature of 350 K (170 °F), a maximum Hertz stress of 1.71 GPa (248 ksi), and a speed of 10 000 rpm. The CBN ground gears exhibited a surface fatigue life that was slightly better than the vitreous ground gears. The subsurface residual stress of the CBN ground gears was approximately the same as that for the standard vitreous ground gears for the CBN grinding method used.

Abstract The civil aircraft nosewheel is clamped, lifted, and retained through the pick-up and holding system of the towbarless towing vehicle (TLTV), and the aircraft may be moved from the parking position to an adjacent one, the taxiway, a maintenance hangar, a location near the active runway, or conversely only with the power of the TLTV. The TLTV interfacing with the nose-landing gear of civil transport aircraft for the long-distance towing operations at a high speed could be defined as a towbarless aircraft taxiing system (TLATS). The dynamic loads induced by the system vibration may cause damage or reduce the certified safe-life limit of the nose-landing gear or the TLTV when the towing speed increases up to 40 km/h during the towing operations due to the maximum ramp weight of a heavy aircraft.

This SAE Standard sets forth measurement procedures and instrumentation to be used for determining a “representative” sound level during a representative time period at selected measurement locations on a construction site boundary. The document is not intended for use in determining occupational hearing damage risk. Determination of a representative time period is left to the judgment of the user.

Development of a single pump load sensing hydraulic system for a military container handler. Harnischfeger Corporation was contracted by the US Government to build and supply a 14 ton lifting capability container handler (crane) that would self propel, fit into a Lockheed C-130 Hercules cargo aircraft and weigh under 25,000 lbs. Harnischfeger contracted Vickers, Inc. to aid in the design of the complete hydraulic system and supply the hydraulic hardware.

This SAE Recommended Practice identifies and examines the various parameters which must be considered in selecting hydraulic system filters, their locations within the system and the dirt capacity of the filter elements.

Multi-microprocessor systems are becoming more prominent in new vehicle and construction equipment applications. Recommended practices are being developed by SAE for serial data communications between microprocessor systems in heavy duty vehicle applications. These recommended practices have potential applications for on and off highway vehicles, construction, agriculture, mining, marine, industrial and aircraft ground support equipment. This paper reviews proposed recommended practices being developed for heavy duty vehicle applications and provides information for off highway applications.

The work describes a concept application that aids a safety engineer to create a layup of equipment models by using an image scan of a schematic and a library of predefined standard component and their symbols. The approach uses image recognition techniques to identify the symbols within the scanned image of the schematic from a given library of symbols. Two recognition approaches are studied, one uses General Hough Transform; the other is based on pixel-level feature computation combining both structure and statistical features. The application allows the user to accept or edit the results of the recognition step and allows the user to define new components during the layup step. The tool then generates an output file that is compatible with a formal safety modeling tool. The identified symbols are associated to behavioral nodes from a model based safety tool.

Sandwich construction has been used for many years in aircraft and missiles, because of its ability to provide strong, stiff, lightweight structures. While the technology is well-developed for certain combinations of materials, there are many new developments which will have a significant impact on future applications. These new developments can be grouped into the following categories: 1. Joining methods. 2. Materials. 3. Geometries. This paper describes new technologies being developed in each of these categories and the impact they will have on sandwich construction.