Originally Posted by sir jman
What is your source that helmets are only rated for 14 mph?
Hey you asked. BTW I agree with the posts above about new ski technology resulting in out of contol skiers going faster. I will add that using older narrow straight skis would result in out of control skier falling down sooner, which means they were going slower when they hit stationary objects.
Some research collected 650 speed data points from 3 different resorts. The radar testing was anonymous and random. The results were reported in the May 2003 ISSS Congress held in St Moritz, Switzerland.Click here for full pdf presentation
. Note you will have to rotate the presentation clockwise to read.
Background Information on helmet testing criteria
• ASTM F2040 standard for alpine helmets uses a 2.0 m drop test on a steel anvil with a 300g max acceleration limit.
• A 2.0 m drop results in an impact velocity of 22.6 km/h (14.0 mph)
Some Other Interesting Conclusions:.
Speed Results: (all differences significant beyond p=0.005, F-test)
• Average speed 26.7 MPH for all observations
• Skiers faster than snowboarders; 3.5 mph
- Skiers (44.5 km/h)> Snowboarders (38.9 km/h)
• Helmeted faster than non-helmeted; 3.0 mph
– Yes (45.8 km/h)> No (41.0 km/h)
• Good visibility faster than poor; 5.2mph
– Good (46.7 km/h)> Poor (38.3 km/h)
• Males are faster than females (4.0 MPH)
• Speeds are highest on ‘Blue Square” trails, not ‘Black Diamond’ or “Green Circle.’
My personal view is helmets are great for fall down go boom when stopped or going very slow. This is where MOST head injuries occur and this is what helmets were designed for. If you value your life and want to stay alive, forget about the helmet thing on your head JUST SLOW DOWN.
I will end with my condolenses to the family.