Boeing engineers are in the process of replacing the wiring design used for the Dreamliners. It’s not a fix-it’s part of a plan to optimize weight and configuration of wiring bundles starting with plane number seven. The first six planes had flight test wiring that will be replaced as part of an overall refurbishing.As part of the overall materials revolution that the Dreamliner represents, some lightweight aluminum wiring will be used instead of copper. “We use both,” says Boeing spokesperson Lori Gunter, “There are different design considerations. We select the material that is appropriate for the intended use.”
Gunter did not provide specifics, but the design rules for aluminum and copper used as wiring are the following:
Aluminum is 50 percent lighter than copper and can save weight in the aircraft.
Copper bends more easily than aluminum.
Corrosion is a significant concern for aluminum wiring. Airbus engineers developed a special protection for aluminum wiring. There are also new specifications for connections.
Last week, the bill for reforming chemical regulation, the TSCA Modernization Act of 2015, passed the House. If it or a similar bill becomes law, the effects on cost and availability of adhesives and plastics incorporating these substances are not yet clear.
The latest crop of coating and sealant materials and devices has impressive credentials. Many are designed for tough environments with broad operating temperature ranges, and they often cure faster, require fewer process steps, and produce less waste.
A new program has been proposed for testing and certify 3D printing filaments for emissions safety. To engineers who've used 3D printers at home this is a no-brainer. It's from a consumer on Kickstarter, and targets use in homes and schools.
For the last 50 years, the Metal Powder Industries Federation (MPIF) has sponsored an awards competition for creative solutions to designing and fabricating near-net-shape parts using powder metal (PM) technologies. Here are the seven Grand Prize winners of the 2015 contest.
Graphene 3D Lab has added graphene to 3DP PLA filament to strengthen the material and add conductivity to prints made with it. The material can be used to 3D print conductive traces embedded in 3D-printed parts for electronics, as well as capacitive touch sensors.
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