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2017-12-01
Book
Ravi Rajamani
The environmental impact of hydrocarbon-burning aircraft is one of the main motivations for the move to electric propulsion in aerospace. Also, cars, buses, and trucks are incorporating electric or hybrid-electric propulsion systems, reducing the pressure on hydrocarbons and lowering the costs of electrical components. The economies of scale necessitated by the automotive industry will help contain costs in the aviation sector as well. The use of electric propulsion in airplanes is not a new phenomenon. However, it is only recently that it has taken off in a concrete manner with a viable commercial future. The Electric Flight Technology: Unfolding of a New Future reviews the history of this field, discusses the key underlying technologies, and describes how the future for these technologies will likely unfold, distinguishing between all-electric (AE) and hybrid-electric (HE) architectures. Written by Dr.
CURRENT
2017-11-21
Standard
AIR5867
This report revises ARD50015 document to the AIR format. This report, as was the original, is intended to complement ARP1420C and AIR1419C documents issued by the SAE S-16 Committee on spatial total-pressure distortion. These previous documents addressed only total-pressure distortion and excluded total temperature distortion. The subject of inlet total temperature distortion is addressed in this report with some background and identification of the problem area. The status of past efforts is reviewed, and an attempt is made to define where we are today. Deficiencies, voids, and limitations in knowledge and test techniques for total temperature distortion are identified.
2017-11-20
Technical Paper
2017-01-5021
Greg Suter, Lodewijk Wijffels, Oliver Nehls
This paper will detail the development of a Handling Controller designed to assist the driver in recovering from oversteer situations using an Active Front Steering (AFS) system. The AFS system uses an electric motor to provide a steering angle overlay to the driver’s steering input. This angle can be used to supplement countersteer during an oversteer event, and to rapidly remove countersteer when the sideslip is collapsing, preventing a fishtailing situation. Key factors considered in designing the system were functional safety considerations for potential sensor failures, and how to assist the driver without creating an unnatural feel or excessive torque feedback in the steering wheel. This system may be used to supplement brake stability controls, increasing stability levels with less harshness. The lessons learned from this application may also be used in designing autonomous steering systems to recover from oversteer situations.
CURRENT
2017-11-20
Standard
AIR1419C
This document addresses many of the significant issues associated with effects of inlet total-pressure distortion on turbine-engine performance and stability. It provides a review of the development of techniques used to assess engine stability margins in the presence of inlet total-pressure distortion. Specific performance and stability issues that are covered by this document include total-pressure recovery and turbulence effects and steady and dynamic inlet total-pressure distortion.
2017-11-18
Article
The Boston-based start-up successfully completed test flights of the SX-1.2—a subscale, subsonic, unmanned demonstrator for its S-512 Quest Supersonic Jet. Competition from Aerion, HyperMach, and Boom points to supersonic commercial flight arriving earlier than thought.
CURRENT
2017-11-15
Standard
J2383_201711
This SAE Recommended Practice establishes uniform Installation Parameters for desiccant Air Dryers for vehicles with compressed air systems.
CURRENT
2017-11-15
Standard
AMS4612K
This specification covers a copper alloy (naval brass) in the form of bars and rods.
2017-11-15
WIP Standard
J1939DA
This document is intended to supplement the J1939 documents by offering the J1939 information in a form that can be sorted and search for easier use.
2017-11-14
Article
The most significant upgrade to Case IH’s Steiger and Quadtrac articulated tracked tractors for 2018 is a new CVXDrive transmission supplied by ZF, the first such application of a continuously-variable transmission (CVT) in the segment, the company claims.
2017-11-14
WIP Standard
J3162
Document industry's agreement with CARB for the collection of monitor ratios as required by 13 CCR 1971.1 (l)(2.2.3). Describe key features of of the data collection process and identity the repository for the completed means. Document examples of the data collected for submission to CARB in compliance to (l)(2.2.3). [Note: The means was developed under a contract administered by ETI, Inc. on industry's behalf and funded by industry. The means is wholly owned by ETI, who agrees to the use of the results for this purpose. No SAE resources were used in the development of the design or the embodiment of the means. The embodiment consists of a software detailed design and Java software housed in a Github repository using the MIT software licensing model].
2017-11-13
Tech Insights
TI-0002
While all-electric aircraft remain at the bleeding edge of the aviation industry, incorporating technologies like proton exchange membrane fuel cells into existing aircraft can result in considerable auxiliary capability with low environmental impact. However, proper consideration must be given to supporting systems to achieve a reliable balance of plant-especially when those systems interface with existing aircraft architectures. The scope of the BoP is to manage and condition the reactant flows to and from the fuel-cell module and to provide power to system components.
2017-11-13
WIP Standard
J513
This SAE Standard covers complete general and dimensional specifications for refrigeration tube fittings of the flare type specified in Figures 1 to 42 and Tables 1 to 15. These fittings are intended for general use with flared annealed copper tubing in refrigeration applications. Dimensions of single and double 45 degree flares on tubing to be used in conjunction with these fittings are given in Figure 2 and Table 1 of SAE J533. The following general specifications supplement the dimensional data contained in Tables 1 to 15 with respect to all unspecified details.
2017-11-13
WIP Standard
AIR6514A
This interface control document (ICD) specifies all software services in the Unmanned Systems (UxS) Control Segment Architecture, including interfaces, messages, and data model.
CURRENT
2017-11-13
Standard
ARP5595B
This Aerospace Recommended Practice aims at providing general utilization guidelines and calculation methods adequate to guarantee the effectiveness and ultimate load strength of tie-down/lashing arrangements performed to restrain cargo on board civil transport aircraft during flight: a. Cargo loaded and tied down onto airworthiness approved air cargo pallets, themselves restrained into aircraft lower deck, main deck or upper deck cargo systems meeting the restraint of air cargo pallets approved in accordance with NAS 3610 or AS36100, or b. Additional tie-down on aircraft structure when necessitated by pallet maximum gross mass or centre of gravity location, or c. Individual pieces of cargo, or pieces of cargo placed onto an unrestrained (“floating”) pallet into either lower deck, main deck or upper deck containerized cargo compartments of an aircraft, or d. Individual pieces of load loaded in non-containerized (bulk loaded) baggage or cargo compartments.
2017-11-13
WIP Standard
AS6522A
The UCS technical governance comprises a set of policies, processes, and standard definitions to establish consistency and quality in the development of architecture artifacts and documents. It provides guidance for the use of adopted industry standards and modeling conventions in the use of Unified Modeling Language (UML) and Service Oriented Architecture Modeling Language (SoaML), including where the UCS Architecture deviates from normal UML conventions. This document identifies the defining policies, guidelines, and standards of technical governance in the following subjects: - Industry standards adopted by the AS-4UCS Technical Committee: These are the industry standards and specifications adopted by AS-4UCS in the generation and documentation of the architecture. - UCS Architecture Development: UCS specific policies on the development of the UCS Architecture. The AS-4UCS Technical Committee governance policies are intentionally minimal.
2017-11-12
WIP Standard
J3300
The SAE Driving Skills Certification Criteria establishes skill levels to drive motorized vehicles in various configurations and environments. It includes the certification criteria required for a driver to demonstrate proficiency along with the facility and examiner requirements to accurately confirm a driver's performance.
2017-11-10
WIP Standard
J2705
This SAE Recommended Practice describes a test method for determining properties of a non-rolling tire quasi-statically enveloping either a set of triangular cleats or a single step cleat. In the case of the triangular cleats the normal force and vertical deflection of the non-rolling tire are determined. In the case of the step cleats the normal force, longitudinal force, and vertical deflection of the non-rolling tire are determined. The method applies to any tire so long as the equipment is properly sized to correctly conduct the measurements for the intended test tire. The data are intended for use in determining parameters for road load models and for comparative evaluations of the measured properties in research and development. NOTE: Herein, road load models are models for predicting forces applied to the vehicle spindles during operation over irregular pavements. Within the context of this document, forces applied to the pavement are not considered.
2017-11-10
WIP Standard
J2731
This SAE Recommended Practice describes a test method for measuring the forces and moments generated at a spindle when a tire rolls over a rectangular obstacle, cleat, at very low speed. The cleat used in a particular test condition is configured with its crest either perpendicular, 90°, to the path of the tire or optionally with its crest inclined at an angle to the path of the tire. The carriage to which the spindle is attached is rigidly constrained in position during each test condition so as to provide a good approximation to fixed loaded radius operation. The method discussed in this document provides cleat envelopment force and moment and tire angular position histories as functions of distance traveled. These histories are essentially free from variations due to tire non-uniformities. The method applies to any size tire so long as the equipment is properly scaled to conduct the measurements for the intended test tire.
2017-11-10
WIP Standard
J2717
This SAE Recommended Practice describes a trio of test methods which determine basic tire size (geometry), mass, and moments of inertia. The methods apply to any tire so long as the equipment is properly scaled to conduct the measurements for the intended test tire. The data are suitable for determining parameters for road load models and for comparative evaluations of the measured properties in research and development. NOTE: Herein, road load models are models for predicting forces applied to the vehicle spindles during operation over irregular surfaces paved or unpaved. Within the context of this Recommended Practice, forces applied to the surface on which the tire is operating are not considered.
2017-11-09
WIP Standard
AIR5771A

This report covers engine tests performed in Altitude Test Facilities (ATFs) with the primary purpose of determining steady state thrust at simulated altitude flight conditions as part of the in-flight thrust determination process. As such it is complementary to AIR1703 and AIR5450, published by the SAE E-33 Technical Committee. The gross thrust determined using such tests may be used to generate other thrust-related parameters that are frequently applied in the assessment of propulsion system performance. For example: net thrust, specific thrust, and exhaust nozzle coefficients.

The report provides a general description of ATFs including all the major features. These are:

  • Test cell air supply system. This controls the inlet pressure and includes flow straightening, humidity and temperature conditioning.
  • Air inlet duct and slip joint. Note that the report only covers the case where the inlet duct is connected to the engine, not free jet testing.
CURRENT
2017-11-09
Standard
ARP991C
This document recommends design objectives for navigation, position, and anticollisionlight systems for visual detection and collision avoidance between airplanes in flight and on the ground. Customers for new airplanes or lighting components, and designers or manufacturers may take advantage of this document in specifying the initial requirements that, in most cases, significantly exceed the applicable minimum intensities as shown in the Federal Aviation Regulations as well provide better stability, longer life and lower operating costs.
CURRENT
2017-11-09
Standard
AS6009A
This document defines a set of standard application layer interfaces called JAUS Mobility Services. JAUS Services provide the means for software entities in an unmanned system or system of unmanned systems to communicate and coordinate their activities. The Mobility Services represent the vehicle platform-independent capabilities commonly found across all domains and types of unmanned systems (referred to as UxVs). At present, over 15 services are defined in this document many of which were updated in this revision to support Unmanned Underwater Vehicles (UUVs). Some examples include:
2017-11-08
Article
The technology-driven Aurora has been involved in numerous NASA programs since its founding in 1989, and as recently as October 24 announced that it had been awarded a contract to perform a comprehensive evaluation of NASA’s Single-aisle Turboelectric Aircraft with Aft Boundary Layer propulsion aircraft concept, and is also renowned for its work on the D8 and DARPA's XV-24A.
CURRENT
2017-11-07
Standard
J551/5_201711
This SAE Recommended Practice specifies measurement procedures and performance levels for magnetic and electric field emissions and conducted power mains emissions over the frequency range 150 kHz to 30 MHz, for vehicles incorporating electric propulsion systems, e.g., battery, hybrid, or plug-in hybrid electric vehicles. Conducted emission measurements in this document are applicable only to battery-charging systems which utilize a switching frequency above 9 kHz, are mounted on the vehicle, and whose power is transferred by metallic conductors. Conducted emission requirements apply only during charging of the batteries from AC power lines. Conducted and radiated emissions measurements of battery-charging systems that use an induction power coupling device are not covered by this document. The measurement of electromagnetic disturbances for frequencies from 30 MHz to 1000 MHz is covered in CISPR 12.
2017-11-03
Article
Mahindra & Mahindra Ltd., part of the Mahindra Group, has developed its first-ever driverless tractor slated for availability in a phased manner beginning in early 2018.
CURRENT
2017-11-03
Standard
J2407_201711
Although not limited to, these installations are normally used on trucks considered as Medium Duty (Class 6 and 7), as well as Heavy Duty (Class 8).
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