Re: [skydrifters] Top Mounts
The PG world used a lot of them so I took mine apart to examine it. There is less compressible foam in a Charley than in a sixteen dollar skateboard helmet.
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Skydrifters,
I surmise that impact protection is not yielded by the foam alone but also by the materials used in the shell as well as the symmetry of that shell. Impact protection is effected by dispersing the impact energy across and through the various materials including the foam and shell. All shells are not made of the same materials and hence have wide ranging structural integrity. No doubt you already know all of this.
As mentioned above - The Insider helmet is tested and certified to CEN Standard EN 966, which is a European testing standard specifically designed for helmets used for sport aviation. This standard includes tests for shock absorption, penetration resistance, and specifications for visibility and head mobility.
I tend to trust the certification authorities as they probably know a lot more about this science than I do however this does make me wonder about the various impact certification levels. Clearly motor cycle helmets are designed to a much higher rating and are approved by DOT and Snell I think, but are generally considered too bulky for Base.
I suppose that at the end of the day it’s a compromise and for me the Charley Insider is superior to a non certified skydiving helmet and offers a good balance of size, weight and visibility.
John