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Because of the thin atmosphere at such high altitudes, to carry a useful payload very large volume and/or very strong but lightweight materials are required. The ISAS BU60-1 scientific balloon holds the world altitude record for an unmanned balloon as of 2009, at 53.0 km.
Two of these booms were linked together by an alloy web, creating a lightweight and very strong main spar. [7] A version of this spar construction method is also used in the BD-5, which was designed and constructed by Jim Bede in the early 1970s. The spar used in the BD-5 and subsequent BD projects was primarily aluminium tube of approximately ...
Ultralight material also has elastic properties. Some ultralight materials are designed with more pores to allow the structure to have better heat transfer, which is needed for many materials, like pipes for example. [3] [1] In compression experiments, ultralight materials almost always show complete recovery from strains exceeding 50%.
New lightweight materials include Ceramic matrix composites, metal matrix composites, polymer aerogels and CNT-yarns, along the evolution of polymer composites. [8] These light weight materials have given way for stronger, more reliable structures, improved production times and increased power-to-weight ratios .
Huntair Pathfinder Mark 1 ultralight. Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with ailerons, elevator and rudder, calling the former "microlight" and the latter "ultralight".
As far back as 1971, the Citroën SM offered optional lightweight carbon fiber wheels. [ 32 ] [ 33 ] Use of the material has been more readily adopted by low-volume manufacturers who used it primarily for creating body-panels for some of their high-end cars due to its increased strength and decreased weight compared with the glass-reinforced ...