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Acceleration Resistant HiK Heat Spreader

Aerospace & Defense Technology: September 2019

  • Magazine Article
  • 19AERP09_04
Published 2019-09-01 by SAE International in United States

As electronic technologies advance in defense and aerospace applications, heat fluxes are becoming larger and more centralized[1,2]. In order to meet the performance specifications of new technologies, thermal solutions must also advance. The push for more capable thermal technologies is evident with the U.S. Air Force Research Laboratory (AFRL) signing an agreement with private companies and contractors for the development of innovative vapor cooling technologies capable of handling high heat fluxes[2].

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Visualizing Motion of Water Molecules for Liquid-Based Electronics

  • Magazine Article
  • TBMG-34892
Published 2019-08-01 by Tech Briefs Media Group in United States

A high-resolution inelastic x-ray scattering technique was used to measure the strong bond involving a hydrogen atom sandwiched between two oxygen atoms. This hydrogen bond is a quantum-mechanical phenomenon responsible for various properties of water, including viscosity, that determine a liquid's resistance to flow or to change shape.

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Nominal High-Altitude Electromagnetic Pulse (HEMP) Waveforms

Aerospace & Defense Technology: August 2019

  • Magazine Article
  • 19AERP08_08
Published 2019-08-01 by SAE International in United States

Calculating the characteristics of high-altitude electromagnetic pulses created by the detonation of a nuclear device.

Even before the Trinity nuclear test in July of 1945, physicists predicted a transient electromagnetic signal would be caused by high-energy photons released from the detonation interacting with the air around the detonation. Predictions of these signals were difficult to make due to the complexity of the physics unleashed by the detonation.

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S400 Copper Media Interface Characteristics Over Extended Distances

AS-1A Avionic Networks Committee
  • Aerospace Standard
  • AS5643/1A
  • Current
Published 2019-07-09 by SAE International in United States
This SAE Aerospace Standard (AS) establishes guidelines for the use of IEEE-1394-2008 Beta (formerly IEEE-1394b) as a data bus network in military and aerospace vehicles. It encompasses the data bus cable and its interface electronics for a system utilizing S400 over copper medium over extended lengths. This document contains extensions/restrictions to “off-the-shelf” IEEE-1394 standards, and assumes that the reader already has a working knowledge of IEEE-1394. This document does not identify specific environmental requirements (electromagnetic compatibility, temperature, vibration, etc.); such requirements will be vehicle-specific and even LRU-specific. However, the hardware requirements and examples contained herein do address many of the environmental conditions that military and aerospace vehicles may experience. One should refer to the appropriate sections of MIL-STD-461E for their particular LRU, and utilize handbooks such as MIL-HDBK-454A and MIL-HDBK-5400 for guidance. This document is referred to as a “slash sheet” and accompanies the AS5643B base standard.
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CONTACTS, ELECTRICAL CONNECTOR, PIN, CRIMP REMOVABLE (FOR MIL-DTL-24308 CONNECTORS)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS39029/64C
  • Current
Published 2019-07-08 by SAE International in United States
No Abstract Available.
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TERMINAL, LUG, CRIMP STYLE, COPPER, UNINSULATED, RING TONGUE, TYPE I, CLASS 1, FOR 175 °C OR 260 °C TOTAL CONDUCTOR TEMPERATURE

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS20659G
  • Current
Published 2019-07-08 by SAE International in United States
No Abstract Available.
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Hybrid Transformer

  • Magazine Article
  • TBMG-34733
Published 2019-07-01 by Tech Briefs Media Group in United States

Researchers have developed a hybrid transformer that has the benefit of a full planar transformer design but uses a wire-wound secondary winding to keep the parasitic winding capacitances lower. Alone, planar transformers have the advantage of a lower profile and better reproducibility, but wire-wound transformers allow for less parasitic capacitances. By combining elements from traditional wire-wound transformers and planar transformers, the overall performance and reliability were improved.

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Electromechanical Actuators Specification Guide

A-6B3 Electro-Mechanical Actuation Committee
  • Aerospace Standard
  • ARP5754
  • Current
Published 2019-06-10 by SAE International in United States
This Aerospace Recommended Practice (ARP) provides general characteristics, requirements, and design data to be recommended for inclusion in a procurement technical specification of an electromechanical actuator (EMA), including its control and monitoring.
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Terminals, Lug: Splices, Conductor: Crimp Style, Copper, General Specification for

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS7928C
  • Current
Published 2019-05-23 by SAE International in United States
AS7928 includes insulated and uninsulated crimp-style copper lug terminals and conductor splices for stranded conductors.
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Electrical Charging Systems for Off-Road Work Machines

CTTC C2, Electrical Components and Systems
  • Ground Vehicle Standard
  • J180_201905
  • Current
Published 2019-05-10 by SAE International in United States
This SAE standard describes alternator physical, performance, and application requirements for heavy-duty electrical charging systems for off-road work machines, including those defined in SAE J1116.
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