WHAT IS GLANCING OFF?
It is the ability of a helmet to Glance Off objects to avoid sending energy directly into the helmet and instead disperse as much energy as possible without stopping in an actual accident. Arai believes that the ability to glance off energy, without stopping, is one of the most important performance characteristics of a helmet in real world scenarios.
A helmet should not just comply with acknowledged laboratory test standards, it should exceed in circumstances and situations outside the criteria of those acknowledged standards. Arai believes that the R75 shape concept for our shell construction, which mandates a rounder, smoother shell thus enhancing the ability of the helmet to both disperse and distribute impact energy by learning from real scenarios through our long history. Arai has continually improved the “Glancing off” performance by learning from real scenarios. The new RX-7V ‘’VAS’’ (Variable Axis System) is the latest development in our pursuit of better helmet performance. Compared with the shell of the RX-7 GP, the smoother area around the temple was increased by an average of 24mm because of the shell modification on the VAS model. Having a larger, smoother shell over a wider area increases the ability to divert more energy.
Drop tests required by laboratory test standards are limited to a vertical fall with the helmet having to accept all of the impact energy directly at one point.
However, real scenarios are very different. In actual accident situations, most cases show that helmets hit obstacles at an angle (oblique impact) not vertically. Therefore, during an oblique impact, the point of impact moves as the helmet and obstacle move against each other. This changing impact point increases the helmets ability to better disperse and attentuate impact energy. This is that glancing off. Arai believes that no helmet can manage all potential impact energy, therefore avoiding or diverting potential impact energy with a rounder smoother shape should be a key function of a helmet. This is why R75 is one of the most important in-house standards at Arai.
EMERGENCY CHEEKPAD RELEASE SYSTEM
Allows easier access to an injured rider. By pulling the orange tabs integrated in the pads, the cheek pads slide out. Making helmet removal easier for trained medical personnel and rescuers and minimising the risk of additional injury.
RX-7V RC / RX-7V / RX-7V Racing / QV-Pro / Concept-X / Tour-X4 / MX-V
Tour-X4 / MX-V
RX-7V RC / RX-7V / RX-7V Racing / QV-Pro / Concept-X / Renegade-V / Chaser-X / SZ-R VAS / Urban-V
MICRO FIT CHEEK PADS
RX-7V RC / RX-7V / RX-7V Racing / QV-Pro / Concept-X / Renegade-V / Chaser-X / SZ-R VAS / SZ-V / CT-F / Tour-X4 / MX-V
MICRO FIT INTERIOR
RX-7V RC / RX-7V / RX-7V Racing / QV-Pro / Concept-X / SZ-R VAS / SZ-V
PULL DOWN AIRSPOILER
RX-7V RC / RX-7V / QV-Pro / Tour-X 4
RC OUTER SHELL
Exclusive technology developed internally by Arai for the GP-6RC F-1 helmet utilizes carbon fibre found in the latest generation of commercial airlines, and is bonded with Arai´s proprietary resins and is reinforced with a band of incredibly super fibre belt specifically oriented to disperse energy loads laterally across the shell surface. In the forehead area, this band increases shell strength without adding thickness or weight, and allows the use of a thinner EPS liner which greatly enhances the upward field of view – especially appreciated in a full racing tuck!
PB-SNC2 OUTER SHELL
Arai´s proprietary (super fibre belt) Peripheral Belt, borrowed from our F-1 technology, maximizes shell strength and flexibility while maintaining low weight. Positioned across the top of the eye port, this band allows the use of a thinner EPS liner which greatly enhances the upward field of view – especially appreciated in a full racing tuck! The Structural Net Composite adds a physical bond to the resin bond of the many layers of fibres and reinforcing materials within the shell. The latest “Z-Mixture” resins increases material adhesion requiring less resin for a stronger bond between materials for a thinner and lighter shell. The latest “Z-Mixture” resins increases material adhesion requiring less resin for a stronger bond between materials for a thinner and lighter shell.
RX-7V Racing, RX-7V
PB-CLC2 OUTER SHELL
Arai’s proprietary (super fibre belt) Peripheral Belt, borrowed from our F-1 technology, greatly increases shell strength and flexibility while maintaining low weight and a lower centre of gravity. Positioned across the top of the eye port, this band contributes to the use of a thinner EPS liner which greatly enhances the upward field of view. A specially designed “mechanically expanded fibre mat”, sandwiched between the inner and outer layers of Arai’s proprietary Super Fibre Laminates, is used to reinforce and bond these two Super Fibre layers without adding significant weight to the helmet. The latest “Z-Mixture” resins increases material adhesion requiring less resin for a stronger bond between materials for a thinner and lighter shell.
QV-Pro / SZ-R VAS / Urban-V
PB e-cLc outer shell
The PB e-cLc outer shell uses a Peripherally Belted e-Complex Laminate Construction (PB e-cLc) for lightweight strength; it’s designed to glance off and spread impact forces. New materials have been used to substitute the AR-mat as middle layer, resulting in a substantial weight reduction while maintaining the same strength as the PB-cLc construction.
Concept-X / Profile-V
SFL2 outer shell
Renegade-V / Chaser-X
SFL outer shell
CT-F / Freeway-Classic / Penta Pro / Tour-X4 / SZ-Light / VX-Pro-Junior
ScLc outer shell
MX-V / Astro-light
VAS-V MV SHIELD
RX-7V RC / RX-7V / Concept-X / Chaser-X / Renegade-V / Profile-V
PSS (PRO SHADE VAS-V MV SHIELD)
RX-7 RC / RX-7 GP / CHASER-V / REBEL / AXCES
VAS SHIELD SYSTEM
Impact energy can be discharged if the head can keep moving.
The basic structure of the human head can be roughly divided into three components; scalp, skull and brain. The role of a motorcycle helmet is to minimize and manage impacts to the brain. Laboratory impact test standards vary somewhat, but generally all define shock absorption levels. Those levels are tested by dropping a helmet, with a steel head form from a predetermined height onto a steel anvil. The G meters within the head form measure the G forces sustained in these drop impacts to verify the impact absorption performance. Standards such as Snell set the test criteria quite high to obtain certification approval.
Under impact the helmet acts as a buffer, the outer shell displaces the energy and the inner liner absorbs the energy as it crushes, slowing the impact speed. The examination of the impact energy management performance of the standard is very different from an actual accident which occurs in an unpredictable and severe environment. vas shield system VARIABLE AXIS SYSTEM The kinetic energy of a moving object increases in proportion to the square of the speed. Therefore, a street rider, traveling at legal limit, can carry up to more than 10 times the amount of kinetic energy. No helmet, regardless of brand or design, can be expected to manage such energies.
Keep smoother and rounder within the test area. Therefore, Arai believes that ”Glancing off” performance would be important to divert energies by keeping the head moving. For potential impacts with
energies above those of the standards, and even above what a helmet might be able to deal with directly, Arai has always tried to make helmets rounder, smoother and stronger throughout its long history. However, even at Arai there are limitations to how round and smooth a helmet can be due to the restrictions of a single pivot shield mechanism. The geometry of current shield systems require a high pivot position. This high pivot point falls within the test area of the standard, across the test boundary lines at the left and right temple area.
The shield is attached to the helmet with a mounting/pivot mechanism. To maintain a smooth/flush transition from shield to shell, the shell area where this mechanism attaches must have some depression or recess. The current shield systems, with some portion of the mechanism within the test area, prevent the shield from maintain a smooth and contiguous curved surface.
VAS is a completely new shield system with a mechanism invented with the sole purpose of eliminating this intrusion into the test area, allowing the shell along the test line at the temples to be made smoother. The new smoother shape is the next generation that aims to further improve on the original mission.
Through decades of experience with real world road and track scenarios, Arai has developed a helmet compiled of detail upon detail that work together and improve the protective capacity of the helmet.