GTL. Gloyer-Taylor Laboratories Inc, is a specialist composite manufacturer and it validates LH2 composite dewar tanks for use in aviation. Recently, they shared that, “In-depth results from the successful validation testing of its small, subscale composite vacuum jacketed dewar tank with liquid hydrogen (LH2).” Think of a dewar as a large thermos bottle and you won’t be far from reality. “A cryogenic storage dewar (or simply dewar) is a specialized type of vacuum flask used for storing cryogens (such as liquid nitrogen or liquid helium), whose boiling points are much lower than room temperature. It is named after inventor James Dewar, who developed it for his own work. They are commonly used in low-temperature physics and chemistry.” (Wikipedia) The company explained, “Test results exceeded expectations regarding holding hard vacuum, heat load, rapid chill-down and hydrogen fraction goal, leading to flight prototype fabrication. “ The company reports, “When fully isolated, the dewar tank held hard vacuum at 2.8.e-6 torr (5.414e-9 psi) for …
