First talking about terrain park safety, there are already speed models for terrain park jumps. I personally think that such models of flight trajectory are absolutely nice to build beter jumps, but I think the question is if measuring G-forces and stuff like that really helps improve safety. First of all to make this sport more safe people should go out and buy themselves a helmet and back protector. I see people doing crazy stuff every day without even a helmet, if they get hurt, sorry its their own responsibility.
Second I think that without any need of people with any grades at university it is easy to say that the bigger and higher the jump, the higher the speed - the higher the risk. I do not think it is nescessary to tell somebody what the G-forces are. Doing a 15 ft. jump will always be safer than doing a 45 ft. jump.
The same I think is about builing the kicker, it seems to be logical that a steep kicker angle will more easy bring a skier backseat than a rather flat angle. So when it gets to building terrain park jumps there is no need to know specific data to tell what kind of feature might be more dangerous.
Apart from that doing spins, grabs and tricks totally changes the flight curve resulting in a different impact. So I think risks can be managed, but never be exactly calculated.
The second thing I read about is a lot of discussion about european snowpark design. When it comes to that let me put some ideas behind that (even if some guys might not want to hear that)
1. Companies like qparks are using safety issues as an excuse for lack of design or flexibility. A ski resort which lets people ski through their parks without helmet or back protectors, even if they do not have any experience, can not be really interested in peoples safety. A park like that on the feldberg does not even have safety signs. So safety can not be the reason why the design looks like that.
It seems more a question of bussiness. There is one market leader in southern germany which is rather interested in selling much too expensive snowpark boxes and rails than making people setting up parks more creative with existing obstacles. They are not even interested that the ski resort crew gets more experienced because otherwise they might decide to do it on their own.
Those two big companies are really not helping to bring the snowpark development further in europe. Thinking out of the box would make them maybe sell less.
I have seen the feldberg park in a terrible shape, where boxes stood loose on the ground with unusable kickers in front of it. They invested more time in making marketing on their facebook page for some bootwarming stuff than investing time in the park.
2. The big problem on some european places is that ski lift companies are often quite old fashioned. In europe what counts is still downhill and slalom skiing they think. It takes a lot to convince them on the positive effect of a snowpark.
Some resorts having a park like kitzbuehel, position their park at the farest point away in the ski area to make sure their "normal guests" are not disturbed. So making space for parks or even creating all mountain parks is still something which is not realized so easy.
3. Freestyle skiing is quite small in europe. Ski schools nearly have no lessons to teach people on how to make use of a park. This results in the fact that most parks in europe are snowboard oriented. At the same time it causes the problem that people not knowing any snowpark rules are often creating dangerous situations in snowparks. The knowledge about the sport is too small.
4. I am european myself, but it seems that europeans are too arrogant to look at parks like bear mountain, seven springs, northstar or keystone (echo mountain until 2010 as well), just to name a few and try to take their creativity out of those examples. They always think that here in europe everything is different. Basically I think we need to look at american parks to build beter parks here!!
It might be somebody says now that giving critics is always easy, but I am actually working on projects trying to bring freestyle skiing further in europe developping nicer more creative snowparks. Hope this might give european freestyle skiing more popularity resulting in more good parks.
(by the way you will find some creative really good parks in europe as well, I am talking more about some of those commercial parks here)