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This paper presents an algorithm that automatically creates unstructured quadrilateral meshes for the full airframe based on just the description of the desired structural members.
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The airframe had a total of 36,041 hours.
An essential element of the airframe design and certification process is the full-scale fatigue test, where an airframe is subjected to realistic variable amplitude loads which are representative of those predicted to occur over the life-of-type.
The results for two failure locations on eight full-scale fatigue tests of near identical modern monolithic airframe sections, as well as over 150 low stress concentration fatigue coupons that were tested at a number of stress levels were considered.
The tape wasn't actually holding the window in or anything like that; the actual pressure seal is further inside the airframe.Anyway, read Mr Smith's whole column for the full story, and don't worry: they're not duct-taping your plane.
The design goal for the energy absorbers was to achieve average floor-level accelerations of between 25 and 40 g during the full-scale crash test of a retrofitted CH-46E helicopter airframe.
The aircraft features a 500 W polymer electrolyte membrane fuel cell with full balance of plant and compressed hydrogen storage incorporated into a custom airframe.
When Boeing developed the 777 in the late 1980s and early '90s, the company for the first time offered full partnership to some subcontractors; Japanese firms held a 20 percent share in the airframe structure and also shared market and program risks.
Although the LWF program called for a structural life of 4,000 flight hours, capable of achieving 7.33 g with 80% internal fuel; GD's engineers decided to design the F-16's airframe life for 8,000 hours and for 9-g maneuvers on full internal fuel.
With the full resources of the Smithsonian Institution at his command, Langley directed his staff of skilled machinists and instrument makers to begin work on a series of airframes and small, lightweight engines to propel them.
The recorder captures two episodes of "airframe rattling".
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com