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Historical one-handed versions have blades varying from 45 to 80 cm (18 to 31 in) in length. The weight of an average sword of 70 cm (28 in) blade-length would weigh about 700 to 900 g (1.5 to 2.0 lb). [20] There are also larger two-handed versions used by ancient and medieval armies and for training by many styles of Chinese martial arts.
The blade is made of non-rustproof carbon steel, blue-plastered by hand and finely forged from the base to the tip of the knife. The 90 mm (3.5 in) long blade shows patina (dark spots) caused by decades of use. It can easily be sharpened to a shaving sharp edge. Carbon steel is a popular choice for rough-use knives and cheaper options.
A laminated steel blade or piled steel is a knife, sword, or other tool blade made out of layers of differing types of steel, rather than a single homogeneous alloy. The earliest steel blades were laminated out of necessity, due to the early bloomery method of smelting iron , which made production of steel expensive and inconsistent.
Me 262 HG I, V9 prototype with a low profile Rennkabine canopy. Me 262 HG II, proposed variant with a 35° wing sweep. Me 262 HG III, proposed variant with a 45° wing sweep and Heinkel HeS 011 engines. Me 262 Lorin, proposed variant with two Lorin ramjets complementing the turbojet engines.
The origin of the name "Damascus Steel" is contentious. Islamic scholars al-Kindi (full name Abu Ya'qub ibn Ishaq al-Kindi, circa 800 CE – 873 CE) and al-Biruni (full name Abu al-Rayhan Muhammad ibn Ahmad al-Biruni, circa 973 CE – 1048 CE) both wrote about swords and steel made for swords, based on their surface appearance, geographical location of production or forging, or the name of the ...
A flame-bladed sword or wave-bladed sword has a characteristically undulating style of blade. The wave in the blade is often considered to contribute a flame-like quality to the appearance of a sword. The dents on the blade can appear parallel or in a zig-zag manner. The two most common flame-bladed swords are rapiers or Zweihänders. A flame ...
BYD claims that "EVs equipped with the blade battery would be far less susceptible to catching fire – even when they are severely damaged." [1] [4] In July 2021, a BYD Han EV with blade batteries was crash-tested in China (car-to-car crash test) versus an Arcfox Alpha-S. About 48 hours after the test, the BYD Han was producing smoke and ...
A blade longer than one shaku but less than two is considered a shōtō (short sword). The wakizashi and kodachi are in this category. The length is measured in a straight line across the back of the blade from tip to munemachi (where blade meets tang). Most blades that fall into the "shōtō" size range are wakizashi.