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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 White Lightning WLAC-1 is an American four-seat single-engined monoplane designed for amateur construction by Nick Jones and sold as kits by the White Lighting Aircraft Corporation of South Carolina. [1] In the 1990s the aircraft design was sold in kit form by Reflex Fiberglass Works of Walterboro, South Carolina. [2]
Material properties (size, color, texture) of fulgurites vary widely, depending on the size of the lightning bolt and the composition and moisture content of the surface struck by lightning. Most natural fulgurites fall on a spectrum from white to black. Iron is a common impurity that can result in a deep brownish-green coloration.
The edges of the hole may be flanged to increase the rigidity and strength of the component. [1] The holes can be circular, triangular, elliptical, or rectangular and should have rounded edges, but they should never have sharp corners, to avoid the risk of stress risers, and they must not be too close to the edge of a structural component. [2] [3]
The girls were swimming at Blue Hole Park, in eastern Oklahoma, at about 10:45 a.m. on August 5 when the lightning struck, the Grand River Dam Authority said in a news release.
Between the primer pocket and the case chamber are one or more apertures known as flash holes, which serves functionally as a touch hole inside the cartridge. In artillery, priming powder, a fuse, squib, or friction igniter is inserted into the touch hole to ensure ignition of the charge. The ignition might be achieved via striking or electrically.
Most often, the type of material being molded, and its attendant viscosity in its liquid form, is the primary factor that leads to the creation of the unwanted mold flash. [3] The process of removing flash, known as deflashing, is commonly performed via cutting, breaking, grinding, or tumbling. Some foundries use robot autogrinders to remove ...
A lightning strike blasted through a gas station parking lot and left 15-foot- diameter hole in Fort Worth, Texas, on Oct. 30. The crater left was about 3-feet deep, Fort Worth Fire Department ...