ODS COMPARED TO COMPETING NEW TECHNOLOGIES
Manufactures have scrambled since the introduction of the 6D helmet to address the need for improved helmet performance. Some have done better than others. The challenge for each of them is the natural shape of the human head. It’s oval shape restricts the helmet from shearing in relation to the skull in two of the three primary axis X, Y and Z. This is because the inner surface of the helmet’s liner binds under rotation with the 4 corners of the skull in one direction, and the cheek bones and jaw in the other direction.
MIPS: is a simplistic shear-plane mated to the helmet liner’s inner surface and is designed to improve the amount of slip that your head naturally has within the helmet. If your head cannot move within the helmet very far because it’s fit properly (snug), and the shape of the skull (as mentioned above) naturally constraining its movement, then these types of systems cannot do much work (unless you’re crushing the EPS liner in a high energy crash at the same time). Additionally, a shear-plane has no ability to mitigate linear accelerations.
6D’s ODS technology is designed with its shearable suspension system sandwiched between two EPS foam liners which are shaped more spherical, like a ball and socket. This superior design position allows for 6 degrees (6D) of free-motion displacement during an impact, regardless of your head shape, angle of impact, or how tight your helmet fits!
• ODS uncouples the outer surface of the helmet from the wearer’s head.
• The ODS system’s isolation dampers activate long before the EPS. This capability allows ODS to mitigate impact forces at varying impact velocities, from all impact angles, for both linear and angular acceleration
• ODS by its design has 6 degrees (6D) of free-motion displacement capability of the inner liner in relation to the outer liner and is less restricted by the shape of the human head.
• ODS is not compromised by the impact angle to the helmet’s outer surface. Simple shear-plane technologies are less effective as the impact angle moves closer to 90 degrees.
Helmet Shell Size: When it comes to the argument of helmet size and the overall protection that is provided to the brain, one thing is for sure. You need both time and distance to increase protection and reduce impact severity.
• A larger shell and softer EPS combination provides more time and distance to stop than a smaller more compact shell with harder EPS.
• The more time we have to stop a body in motion the lower the transfer forces will be. Time and motion are related; i.e. the shorter a distance you have to stop the higher the forces generated. The opposite is also true. The more distance you have to stop the lower the force generated for objects of equal mass.
• Think about the often referenced engineering project where you build a box to house an egg with some sort of energy management material inside and then drop it off the roof to see if the egg survives! The small boxes never worked no matter what magic material you had inside!