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by BASEwiki

Early in the development of BASE-specific canopies, it was noted that the rear corners of the canopy frequently “inverted” themselves during slider-down openings. Most often, these tail inversions would clear themselves before the canopy was fully inflated. Sometimes, however, they would develop into a lineover malfunction. Tail inversions are the mechanism by which lineovers can occur more frequently in slider-down jumps than in slider-up; the tailgate was designed to prevent them.

The tailgate is a piece of 900 pound Dacron no longer than 10” that is trapped (so that it is not lost on opening) in one of the center C lines not far down from the attachment point. The exact location varies according to the canopy model. During packing, the tailgate is folded around the center C and D lines and all of the brake lines and closed by several wraps of a small rubber bandcut in half lengthwise.

The tailgate promotes nose-first inflation by delaying inflation of the rear of the canopy. It very significantly reduces (but does not eliminate) the incidence of lineovers on slider-down or slider-off jumps.

It is important that a sufficient number of wraps are taken with the elastic when using a tailgate. Wrapping only once or twice on a typical two- or three-second delay will render the tailgate less effective and can lead to lineovers. Provided a tan elastic is used, it is virtually impossible to hold the tail closed too long on such a delay — the elastic will break if it needs to. Black elastics must not be used to close a tailgate, since they will not break in such a scenario and can cause a tailgate hangup in that scenario.

Submitted by BASEwiki on 2007-06-11 | Last Modified on 2007-06-27

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