These designs result in drag coefficients above 1.0 by designing for maximum drag and adding airfoil lift elements to the design. Early 'chutes were packed directly into the harness container. Diapers provided a wrap-around closure for the chute and lines, popping completely open upon deployment. Bags have evolved into 2-compartment designs, separating canopy and lines, giving a controlled sequence to the deployment. Ballistic deployment devices Early problems included mounting position and bridle routing difficulty.
Lines get too bound up in the system.
The next most common cause is turbulent conditions, Last year was unusual in having two mid-air collisions.