Jump Shack Develops Computerized Container
The Jump Shack announces the completion of a five-year project to develop a data collection system which would measure and record parameters of events occurring during a skydive. Such parameters would include riser forces at the attachment ring. This data is complimented with input from a Didgitude. The data collection rate can be adjusted through direct serial interface with a PC which also provides for download of the recorded binary file. The recorder has an eight channel capability, we are currently only using the three channels referenced above. Future plans call for incorporation of a accelerometer and a thermistor. The data recorded from the accelerometer could be compared to the data from the base 3 Ring mounted force transducers for confidence.
Early jumps on the system have produced some interesting results. We are collecting data at a rate of 100 times per second per channel says Project Leaded Antonio “China” Macedo. The first jump we recorded data for over 8 minutes between exit and landing, that amounts to 144000 data points with a time line. That translated to 2900 pages of text. Upon examination of the data we were able to see the aircraft climb during the last part of the jump run. We could identify the exit and the time to terminal on the altitude plot. This jump was a tandem with 355 lbs. total load. We decided not to put the drogue out until 9000 feet after an exit at 13,500. This gave us an opportunity to measure tandem terminal without a drogue and then with a drogue below 9000 to the pull altitude of 6000. The opening on this jump took about 10 second and 1000 feet. At about 4000 feet a spiral was initiated both a sudden drop in altitude and an increase in riser forces were observed in the data. The ten second of this dive, which define the opening, are presented for observation.
Future jumps are planned to ascertain the riser forces during a violent malfunction. This data will tell us to what force level our riser releases are required to operate. Additionally, we will be measuring just how fast a stylist goes during their no lift dives and how fast a free-flyer is going during head down.