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In earlier days, birch bark was occasionally used as a flashing material. [7] Most flashing materials today are metal, plastic, rubber, or impregnated paper. [8]Metal flashing materials include lead, aluminium, copper, [1] stainless steel, zinc alloy, other architectural metals or a metal with a coating such as galvanized steel, lead-coated copper, anodized aluminium, terne-coated copper ...
The LRSI tiles were manufactured in the same manner as the HRSI tiles, except that the tiles were 8 by 8 inches (20 by 20 cm) square and had a white RCG coating made of silica compounds with shiny aluminium oxide. [1] The white color was by design and helped to manage heat on orbit when the orbiter was exposed to direct sunlight.
The Soviet spaceplane, known as the Buran, also used TPS tiles that are similar to the American Shuttles. With the Buran also using a ceramic tiles on the bottom of the orbiter, and carbon-carbon on the nose cone. [17] Many problems arose with the tiles used on the Space Shuttle, while minor damage to the heat shield was somewhat commonplace.
In early 2019, SpaceX was developing an actively cooled heat shield for its Starship spacecraft where a part of the thermal protection system will be a transpirationally cooled outer-skin design for the reentering spaceship. [53] [54] However, SpaceX abandoned this approach in favor of a modern version of heat shield tiles later in 2019. [55] [56]
AVCOAT was used for the heat shield on NASA's Apollo command module. [4] In its final Apollo form, this material was called AVCOAT 5026–39. Although AVCOAT was not used for the Space Shuttle orbiters, NASA again used the material for its Orion spacecraft [5] first for the initial Orion test and then for a different type of heat shield for the later Orions.
The albedo of several types of roofs (lower values means higher temperatures). Reflective surfaces, or ground-based albedo modification (GBAM), is a solar radiation management method of enhancing Earth's albedo (the ability to reflect the visible, infrared, and ultraviolet wavelengths of the Sun, reducing heat transfer to the surface).
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In line stabilisation, the glide path is stabilised to infinity. As the deck pitches and rolls, the source lights are rolled to maintain a steady glide-slope fixed in space. Inertial stabilisation functions like line, but also compensates for the flight deck heave (the straight up and down component of deck motion).