High voltage systems on aircraft

May 24, 2013 Michael Traskos

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

Odd wire gauges for aircraft wiring

April 25, 2013 Michael Traskos

Have you ever wondered why only even wire gauges are produced (e.g. 8, 16, 20, etc.) for aircraft wiring? For centuries, wire manufactures have produced even wire gauges because there has been little or no demand for odd wire gauges. Further, there is a slight difference between a 22AWG and 23AWG and a 23AWG and […] Read more

Building an electrical wire testing program: Selecting tests, Part II

March 18, 2013 Michael Traskos

This article is a continuation in a series devoted to providing guidance to engineers on what should be considered when comparing different wire insulation types for a given application. It can be the basis of an electrical wire testing. Here are the previous articles: Determining the Right Wire for your Application Building a Wire Program […] Read more

Building an aircraft electrical wire testing program: Selecting tests, Part I

February 7, 2013 Michael Traskos

This article, which focuses on test selection, is a continuation of a discussion on wire selection that was started in the Determining the Right Wire for your Application article. The series could be used as a basis for understanding electrical wire testing. A quick scan of the wire tests on WireFacts.com demonstrates that there are […] Read more

Correct aircraft wire selection for your application

January 17, 2013 Michael Traskos

Wire selection for a particular application can be a time consuming process. Selection of the right wire for the particular application to maintain device reliability and prevent a potential catastrophic failure (in the case of signal quality degradation or electrical arcing for power wires) can be difficult.In the aerospace industry, this is rather simple: there […] Read more

The age of your aircraft and wire systems implications

November 15, 2012 Michael Traskos

A fleet age review of 16 American aircraft operators performed by Lectromec is shown below. This includes both regional and major airlines as well as shipping companies. The data is based on available FAA data for US registered aircraft. Percentage of Fleet in Age Range Carrier # of Aircraft Average Age 16 – 20 years […] Read more

Flammability for Aircraft Wiring

November 5, 2012 Michael Traskos

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

Hazards of hot stamping for aircraft wiring

October 18, 2012 Michael Traskos

Hot stamping is a technique that has been used to identify wires for decades. However, this technique has been banned by the US military aerospace platforms or significantly discouraged by the FAA for a number of years. There are many reasons to understand stamping techniques for aircraft wiring. Two extreme examples of hot stamping gone […] Read more

Aircraft wiring: Polyimide wire life projection

September 25, 2012 Michael Traskos

Polyimide wire (commonly referred by the trade name, Kapton®), is the mustard colored kind of aircraft wiring that can be found in older civilian and commercial aircraft made before the 1995. Similarly to other wires, it degrades over time. However, unlike other common aircraft wire insulations, the damage that it causes through electrical arc tracking […] Read more

Lectromec Harness Derating Tool (HDT) tutorial for EWIS

September 22, 2012 Michael Traskos

As mentioned on the WireFacts blog, the Lectromec Harness Derating Tool (HDT) is now up and running. The HDT is designed to follow the guidance provided in AS50881 on how much electrical current should be in the wires for a given harness. If the guidance is not followed, the electrical current in a harness will […] Read more

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