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High temperatures and testing electrical aircraft components

An aircraft must perform under a wide range of temperature conditions. As a result, designers must pay attention to testing electrical aircraft components to see if they can endure constant changes in temperatures over the years. Today we have a short video that gives an overview of what role a scientific oven plays in testing […] Read more

What’s next for aircraft EWIS: Carbon nanotubes

This article describes findings from a Rice University study showing the potential for creating new products based on carbon nanotube (CNT) technology. According to the research, CNT fibers have incredible properties that make them ideal for aerospace. For example, they are much stronger and have a greater capacity for carrying current than copper cables of the same mass. Read more

Aircraft wire abrasion resistance

The proper installation of wiring will dramatically reduce unnecessary stresses and result in an uneventful service life. In the real world, wires rub against various airplane components and can create unsafe conditions from both physical and functional viewpoints. Because of this, materials must be selected that can endure mechanical stresses and not pose a hazard […] Read more

Aircraft wire degradation and looking in the arc

Those who have witnessed electrical arcing and aircraft wire degradation first hand know the feeling of the intense heat radiating from the arc location, the screeching sound (AC arcs), and the bright flash that leave you visually stunned for several moments. The problem with recording these events is that the arc flash is often so bright […] Read more

270VDC arcing in aircraft wiring

In a recent presentation to the SAE at the biannual meeting, Lectromec presented a summary of the work that was performed by several companies and the Federal Aviation Administration (FAA) last summer. These tests were performed at the FAA’s Technical Center in Atlantic City on 270VDC in aircraft wiring. There were four test objectives: Perform […] Read more

2 EWIS insights from a presentation at the AIAA conference

Th 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference was held on January 2010 and included presentations of a wide range of technical papers. From the perspective of EWIS, authors McCabe and Cyphers reported on A Study of Over-Current Protection, Electrical Arcing, and Fire Protection. Their research objective was to gather data for ballistic threats […] Read more

Aircraft EWIS high voltage testing considerations

There are two factors that need to be considered when using aerospace wires/cables for higher voltage systems: Determining the long-term insulation life impacts of high voltage utilization The impact that high voltage testers may have through repeat high potential testing In this article we will focus on the second factor. For this factor, a common […] Read more

High voltage systems on aircraft

Aerospace Information Report (AIR) 6127 currently being developed by the SAE AE-7 committee provides a framework for designing high voltage subsystems utilized for More Electric Aircraft (MEA). The AIR identifies design risks, mitigation techniques, and testing methods for MEA. Electrical discharges on MEA are a potential risk that should be mitigated through careful design and […] Read more

Flammability for aircraft wiring

Among the multitude of new wire qualification tests is the wire flammability test for aircraft wiring. This article covers a test that is designed to assess a wire insulation’s ability to: 1) limit the burn length when exposed to a flame; 2) have no molten material drop from the sample; and 3) not ignite. Read more

Does the mixing of different aircraft wire types create problems?

Modifications or additions to an aircraft wire will typically require (at least in some locations) the addition of new wire constructions to existing bundles. The concern that some have had is that, by mixing the different wire insulation constructions, it can create increased chaffing between wires, which can lead to premature failure of the wire […] Read more