WHAT MAKES OUR SYSTEM DIFFERENT?
Our avalanche backpacks are all equipped with the unique ABS® TwinBag airbag system with two independent airbags in volume-optimized form as well as the proven pyrotechnical ABS® release system. Find out here why this combination is the best and safest option on the market for us.
THE ABS® Twinbag AVALANCHE AIRBAG System
How does an airbag work in general?
An avalanche is not a liquid mass, not a waterfall. The avalanche snow consists of snow crystals of various shapes and sizes. When these granules start flowing during an avalanche, the granules rotate. The small parts crawl under the parts with larger volume and push them upwards. There this "segregation dynamic" subsides and the larger, heavy parts sink back again. However, if a snow slab has formed, it remains on the surface despite the higher weight due to the large contact surface. If a skier/snowboarder is caught in an avalanche, the same thing happens. He is pushed upwards by the segregation effect. There the lift dynamic breaks off and he immediately sinks back into the snow masses. He lacks the necessary supporting surface that balances his volume density against the density of the avalanche snow. However, if the skier/snowboarder activates his avalanche airbag in time, he can counteract the burial.
How well this works depends on the airbag system, which is why ABS has optimized the system under the following aspects:
- Number of Airbags
- Position of the airbag
In order to remain on the surface during the segregation process, only the additional contact surface created counts to compensate for the significantly higher mass density of human beings compared to the much lower mass density of avalanche snow. ABS® Twin Airbags have the largest surface area on the market at 7240 cm2, which is crucial to avoid being buried in an avalanche.
ABS , with its TwinBag system, is the only manufacturer to provide double safety with two completely independent airbags. Both airbags are filled independently of each other with separate valves and hold the air independently of each other - if one valve or airbag breaks down, a second one always remains. Avalanches do not only descend over gentle meadow slopes, on the contrary - obstacles such as stones, rocks, mountain pines or broken trees can be in the fall path.
With only one airbag without separate chambers, a tear in the airbag cover is sufficient for the entire system to lose its function completely!
ABS has the most practical experience and therefore only uses TwinBag technology with two independent airbags.
Only with ABS®-Twinbags you have full visibility, which helps you to escape an avalanche.
It is important that the snow can flow off during an avalanche and does not accumulate behind the head. This is only possible with a ABS® Twinbag .
Center of mass vs. center of volume - It is important to have the center of mass and the center of volume as close as possible. Only then can a stable position in the avalanche be achieved. With the ABS® TwinBag the buried subject tends to lie rather flat on the snow surface due to the lateral attachment of the airbags.
Head airbag vs. twin airbag - The generated contact area of all head airbags is significantly smaller than that of twin airbags. The attachment around the upper body forces the avalanche victim into a vertical position, which means that the torso of the avalanche victim is hardly available as a contact surface. With airbags that surround the head, there is also a risk of a snow wedge forming between the head and the airbag, which can be dangerous for the neck of the avalanche victim. For this reason, the head area between the two ABS® airbags is clear, allowing avalanche snow to flow away.
A mono airbag behind the head leads to a negative anchoring effect. If you get stuck, you can no longer flow in the runout area of the avalanche and the danger of being buried is high, despite the inflated airbag. On the other hand, the laterally mounted double airbags create a more effective contact surface and promote a horizontal position, which significantly reduces the anchoring effect.
Only ABS®-Twinbags guarantee a stable position in the avalanche to reduce turbulence and thus prevent serious crash injuries.
ABS® RELEASE SYSTEM
ABS is well known for its field-tested and proven pyrotechnic release system. But how does the release actually work and what happens when you pull the activation handle ?
When the handle is released, the piston goes up...
...which causes the spring to hit the cartridge...
... and this one on the needle.
This explodes the cartridge and the pressure wave flows from the handle over the hose into the piercing unit...
PUNCTURE UNIT AND BOTTLE HEAD
....there the whole piston is pressed into the cartridge , which is thereby pierced. The 300 bar of pressure released by this is fed through the bevelled needle into the hoses.
There are 2 hoses connected to the cylinder head - one to each of the airbags - this distributes the air into the airbags. Additionally, Venturi nozzles suck in ambient air to fill the airbag even faster.
WHAT ADVANTAGES DOES THIS RELEASE SYSTEM OFFER?
Temperature independent - sealed system protects against external influences and is extremely reliable even at low temperatures or high wind speeds.
Extremely reliable and fast filling - the inert gas of the cartridges is neither flammable nor toxic and fills the Twinbags in 2-3 seconds regardless of temperature or external pressure load.
Removable handle - this makes it compatible with both left and right hand side, and also allows the system to be transported in an airplane or helicopter.
Low maintenance - the refillable cartridge can be refilled at Service and is immediately ready for use again with a new handle