Aeronautics and astronautics – Safety lowering devices – Parachutes
Patent
1986-03-11
1987-08-18
Barefoot, Galen
Aeronautics and astronautics
Safety lowering devices
Parachutes
244151R, B64D 1706
Patent
active
046871608
DESCRIPTION:
BRIEF SUMMARY
The invention is based on a parachute system comprizing three separate parachutes with shroud lines together with the associated three-point harness, a canopy separating lock being provided on each of its left and right-side carrying straps, with articulation points for the shroud lines are fitted, as well as a packing sleeve containing a packing sack.
Such a parachute system is known from Report IB 154-75/13 of the Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt E.V., Braunschweig, entitled "A parachute system for the 1980's" and a lecture with the same content.
In the known case, an articulation strap is provided for each canopy separating lock, the shroud lines of all three parachutes being fixed to said strap in such a way that the shroud lines of a first parachute are all articulated to one articulation strap, the shroud lines of a second parachute are all articulated to another articulation strap and the shroud lines of a third parachute are articulated to both articulation straps.
Such an articulation, which is also called a two-point articulation, suffers from the disadvantage that the parachutes and shroud lines can, during the descent or fall phase, twist within themselves and within the complete parachute system, which impairs the flying characteristics, but in particular endangers the parachutist.
In addition, during opening, the individual parachutes can impede one another. Due to the limited jump height, this type of articulation represents a considerable safety hazard for the parachutist.
The problem of the present invention is to provide an articulation between shroud lines and articulation straps for a parachute system, which is suitable for articulating all six shroud line bundles of the parachutes to the articulation straps of the harness in such a way that the three parachutes can open rapidly and without impeding one another and which cannot twist during the descent phase, whilst being rapidly detachable from the harness by the parachutist after landing.
On the basis of the features of the preamble of claim 1, according to the invention this problem is solved by its characterizing features. As a result of the advantageous articulation of all the shroud line bundles to the articulation points of the articulation strap, it is possible to so fix the six shroud line bundles of the three parachute canopies to the articulation points of the four articulation straps in such a way that a troublefree, rapid opening of all three canopies is possible during a short descent phase. It is no longer possible for the parachutes to twist. It is also ensured that the parachute system is subject to much less damage.
The arrangement according to the invention also permits an easy packing process, because the now quadruple and no longer double-articulated shroud line bundle can be more easily drawn from the pack on jumping.
There is also an overall increase in operational safety. After landing, such an arrangement permits a rapid parachute - parachutist separation, because only two per se known canopy separating locks are used. This type of articulation leads to an overall and significant reduction in the safety risk for the parachutist.
An embodiment of the invention is described hereinafter relative to the drawing, wherein show:
FIG. 1: the parachutes with harness and articulation.
FIG. 2: a larger scale view of the articulation.
FIG. 3: an articulation variant.
FIG. 1
FIG. 1 shows the parachute system according to the invention during the descent phase, because it is then possible to see the articulation more easily. A parachutist is not shown so as not to overburden the drawing.
The parachute system comprises a first parachute 1, a second parachute 2 and a third parachute 3. Each parachute is equipped with shroud lines 16, but these are only shown on the first parachute 1. In the case of each of the parachutes, these shroud lines 16 are combined into in each case two partial bundles 8-10, which are fitted to four articulation straps 4-7 by means of per se known articulation points 1
REFERENCES:
patent: 4090683 (1983-05-01), Derrien et al.
Barefoot Galen
Bruggemann & Brand GmbH & Co. KG
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