Re: [VitalEdge] Low static line jumps from a crane
Reading through your post about the type of information you've been gathering, I notice a huge emphasis on information that you can gather on a single jump, and very little emphasis on information that is acquired over dozens/hundred of jumps. For example, the following are things you can measure on a single jump:
VitalEdge wrote:
Information gathered was interesting, we calculated wing loading, jumpers weight/gear. wind conditions, landing areas, weather. jumping from lower cranes each time, checking gear after each jump, full gear check, lines canopy etc.
It's good that you're doing these things, but they are only a small part of the risk-assessment equation. You do list a couple of things which are particularly useful to compare between a large number of jumps:
In reply to:
watching and video taping each jump and comparing opening shocks on canopy and time in the air.
But, with only 15 jumps, I'm concerned that you might be putting way more weight than you should on a very small data sample. This kind of information is only meaningful when it's compiled over a much larger number of jumps
You talk about working down to 130 feet by doing a single jump from 180 feet and two from 150. This simply doesn't give you enough data on what can go wrong at 180 or 150 feet, how often it goes wrong, and how it can be avoided. Many of these things can kill you at 130 feet.
In addition to gathering
statistically significant data on objective hazards, there are skills which are required to jump 130 feet repeatably which you are unlikely to have acquired in 15 total BASE jumps. You'll get away with it once or twice without putting in the time, but when things go wrong, I'm concerned that you'll find yourself lacking the experience to deal with the more complicated situation.
Of course, this is BASE jumping, and there are no regulations telling you what to do. You are free to take on all the risk you want, but I worry that you might be taking on a whole lot more risk than you realize.
Michael