Enter a word (or two) above and you'll get back a bunch of portmanteaux created by jamming together words that are conceptually related to your inputs.
Helmets reduce the frequency and severity of head and brain injuries over a range of impact severities broader than those covered by the impact attenuation standards.
The basis for any protective device is two-fold: there must be the perception of risk and there must also be the perception that the device somehow attenuates that risk.
From antiquity to the present, protective headgear prevail whenever both these perceptions are present and disappear whenever either perception is questioned.
I learned about the polycarbonate motorcycle helmet manufacturing process and all of the work that it takes to create a Nolan helmet.
Nolan has developed many trade secrets for manufacturing their composite helmets and I was sworn to secrecy at the front gate, so unfortunately I'm not at liberty to discuss it.Our goal was to document the impact attenuation performance of common helmet types over a wide range of impact speeds.Sixty-five drop tests were performed against the side of 10 different helmets onto a flat anvil at impact speeds of 0.9–10.1 m/s (energy = 2–260 J; equivalent drop heights of 0.04–5.2 m).However, I also visited the helmet safety standards test labs at Nolan.That is where both the polycarbonate and the composite X-Lite helmets are developed and tested and the designs certified to meet the various worldwide standards in the over 70 countries where Nolan helmets are sold.Follow this link to find a medical examiner who is certified by the FMCSA to perform DOT physical exams: https://nationalregistry.gov/NRPublic UI/A DOT physical exam is valid for up to 24 months.The medical examiner may also issue a medical examiner's certificate for less than 24 months when it is desirable to monitor a condition, such as high blood pressure.The Snell Foundation establishes new helmet standards every 5 years.SA-2015 is the current helmet standard for competitive automotive sports.The SA2010 standard is the previous standard and will be allowed by most sanctioning bodies until the year 2020 or 2025.SFI 24.1 Helmets are designed for youth auto racing applications and approved by most Junior Dragster and Quarter Midget organizations.