While I'v got an affection for plastics, I think it does have its limitations. There will need to be a lot more empirical testing of plastic in airplane body parts before the general public will be ready to fly in a plastic plane.
Alcoa calls this product a "third-generation" aluminum-lithium alloy. The "second-generation" aluminum-lithium alloys have been around since at least the 1980s. They are used fairly extensively in space applications, with the best-known being the Space Shuttle external tank. They are also used in military aerospace applications (for example, the MiG-29M airframe). However, they are less widely used in commercial applications. I think the biggest reasons are cost and unfamiliarity. Another issue is anisotropy of properties, although this is an issue with composites as well. Alcoa claims to have addressed this with the new generation of alloys: http://www.alcoa.com/global/en/innovation/papers_patents/pdf/LMT2007_110.pdf
Wow. Looking at the link to the information about these alloys, it makes you wonder why their use isn't more widespread: lower density; higher tensile strengths; higher elastic modulus. Where've these alloys been up to now?
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
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