Snell Or DOT Certified Motorbike Helmets

May 4, 2009

Snell (Snell Memorial Foundation), DOT (The federal Government’s Department of Transportation) is the two organizations setting safety standards for motorcycle helmets in the United States. DOT helmet sets the minimum standard for all the helmets, which are sold for motorcycling on public streets. Snell Helmet sets voluntary standards for the motorcycle helmets to a private, non-profit organization, which use bicycle helmets and auto racing helmets, and all kinds of protective headgear. Snell standards are also known as by world’s toughest standards. Protective capabilities in helmets are a bit more than any other in the market. Some tests are available in the standard other than a helmets force presentation that determines what will happen when a motorcyclist goes headlong into the street. Both helmets testing affect the helmet against a steel edge anvil that will simulate the edge of a guardrail. Impact severity and impact criteria are different in both Snell and DOT helmets.


The testers determine that the helmet generally withstood the impact. Severity of an impact can be articulated in terms of how a large amount of mechanical energy is generated all through the event. The quantity of energy is reliant upon the speed or velocity of the head impact and its mass or weight. In helmet testing, if the fall is from upper or heavier to the head form then the extra ruthless will be the impact. In view of the fact that there is until the end of time some frictional loss in the test equipment, both Snell and DOT needs that the headform velocity is measured just before the helmet impacts the test anvil. Snell procedures impact severity in terms of energy, the mass of the headform times the square of the impact velocity divided by two. The board shows the impact energy in joules for anvil type and headform size for each standard. Snell requires that helmets withstand considerably superior impacts than DOT.


Different methods are followed to analyze the pulses by Snell and DOT motorbike helmets. The peaks values of Snell limits are 300 G’s and for DOT is about 400G’s but the duration limits are depending upon the acceleration pulse. The test of the impact can be articulated in terms of how much the mechanical energy is generated during the event. Both the helmets that are Snell/DOT measure the suddenness of the stop by an accelerometer, which is a device, used to measure acceleration or in this case, deceleration that is mounted inside the headform.

There are also managerial differences between the Snell and DOT. A Snell Certification resource that Snell technicians in Snell labs tested samples of the helmet to Snell standards before the helmet was certified. Moreover, as a condition of certification, Snell regularly buys samples of all the Snell certified products and brings them into their lab for the follow-up testing. DOT certification is through the honor system. The helmet’s company determines whether this helmet satisfy DOT and then claims the qualification for themselves.

Visit my website for information about DOT and Snell Motorbike Helmets.



The History Of Motorbike Helmets

March 23, 2009

The first motorbike was reported to have been made by Gottlieb Daimler in 1885. At that time, it was built not for speed.. As speed is not being a factor, no one really thought of motorbike helmets. Probably, the motorbike helmets were not at all necessary in the beginning. Nobody imagined about wearing motorbike helmets when the speed was not an issue and the roads were not filled with millions of motor vehicles. However, as public started to demand the need for speed, motorcycles were made to go faster. Between 1931 and 1953, the speed of motorbikes increased, as people started to show interest in riding motorbikes and passion for speeding. As the speed increases, so did the number of accident fatalities. In 1953, Mr. Lombard applied for a patent for his helmet. This was the foundation of the development of the modern-day motorbike helmet. The standard had been set, and helmet manufacturers quickly followed Lombard’s guide.


Since the first motorbike helmet was introduced, safety agencies, many of them government, recognized the need for head protection for riders. The number of head and neck injuries was increasing, so the use of helmets had been verified in order to reduce the number of accidents. So the safety agencies lobbied for compulsory helmet laws. In 1961, the world’s first mandatory motorbike helmet law was passed on and the safety agencies really got into the act. In 1966, throughout the controversy over mandatory helmet laws, helmet manufacturers did what they could to present better protection to riders. In 1967, the first full facial helmet was introduced, providing improved vision. Stronger and lighter helmet was developed, giving motorbike riders more comfort and more protection. In the 1970s, technology created an improved use of energy- absorbing equipment and better eye protection. Finally in 1974, U.S department of transportation introduced federal motor vehicle safety standards for motorbike helmets. It turns out that many people found motorbike helmets to be too silly in looks or too-un-cool to wear. Following the order was the only way to make sure that they received funds for the highway maintenance and construction that was needed. The motorbike riders argued that in should not affect anyone else if they were injured or killed in a crash. Well, they were wrong about that! As people get order, they feel a stronger need for freedom, which includes the freedom to ride their motorcycle without a helmet. Again, the results speak for themselves – no helmets, more deaths.


            There is an important source of crash data and that is the U.S.C. hurt traffic accident survey. Dr. Hurts has attended over 900 motorbike traffic accidents and analyzed over 3600 motor cycle accident reports.


            Motorbike Helmets are now manufactured by about hundred companies. When you buy a helmet, the most important thing to remember is to get a Snell and DOT (department of transportation) certified helmets, which fits and feels good. In those cases, wearing a motorbike helmet makes the difference of your life and death.


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March 23, 2009

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