Difference between revisions of "Helmet"
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Latest revision as of 04:52, 26 April 2020
Definition
A helmet is a form of protective gear worn to protect the head. More specifically, a helmet complements the skull in protecting the human brain. Ceremonial or symbolic helmets (e.g. UK policeman's helmet) without protective function are sometimes worn. Soldiers wear helmets, often made from lightweight plastic materials.
The word helmet is diminutive from helm, a medieval word for protective combat headgear. The medieval great helm covers the whole head and often is accompanied with camail protecting throat and neck as well. Originally a helmet was a helm which covered the head only partly and protected it from injury in accidents.
In civilian life, helmets are used for recreational activities and sports (e.g. jockeys in horse racing, American football, ice hockey, cricket, baseball, camogie, hurling and rock climbing); dangerous work activities (e.g. construction, mining, riot police, fighter pilots); and transportation (e.g. motorcycle helmets and bicycle helmets). Since the 1990s, most helmets are made from resin or plastic, which may be reinforced with fibers such as aramids.
In Drag Racing
NHRA Helmet Rule for 2020
Helmets Drivers of all 8.59 or quicker cars, including motorcycles, must wear a helmet meeting Snell or SFI Specifications. Full-face helmet mandatory on all cars 9.99 (1/4 mile)/6.39 (1/8 mile) or quicker. See individual Class Requirements for additional requirements, such as Stock Eliminator. Shield mandatory 7.49 (1/4 mile) and quicker. Drivers of NHRA Lucas Oil Drag Racing Series and E.T. cars (13.99 or quicker) (*8.59) must use a helmet meeting Snell SA2010, M2010, or SFI 31.1/2010, or 41.1/2010 Specs. Drivers in supercharged, front engine, open-bodied cars and Funny Cars must wear a helmet meeting Snell SA2010, SAH2010, or SFI 31.1/2005.
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