| 摘要 |
A geometric-tree like gymnastic amusement-thrill structure, devised for relatively safe, exhilarating, gravity defying, action by several novice or skilled aerobatic gymnasts at one time; each enjoying their own bungee-cord suspension. Efficiently based upon a central ground-anchored vertical trunk-pylon member employing a preferably four-way arrangement of radially upward and outwardly extending branch support-booms, each in discreet combination with a laterally supporting ground-anchored beam extending upward to a point proximal the base of its respective support-booms. Plus, nearly vertical compression-load beams are secured at their lower-ends near each support-boom's lower treminus, and secured at their upper-ends near the outer ends of the respective overhanging support-boom. This X-shaped structure is additionally secured in rigid stance via a plurality of strategical placed triangulated tension-cables extending upward at an angle from proximal the ground anchoring point of the lateral ground-anchored beams to a point well up on the support-booms. The structure is preferably of aluminum or steel tubing, and separate bungee-cords are strung between the outer distal ends of each support-boom, and each bungee-cord control-cord rides over a separate polly to extend down to the ground for winch-drawn anchoring. A trampoline is arranged directly below each of the four exemplified bungee-cord aerobatic maneuvering-bays located between the respective support-booms, thereby providing a cooperative elastomeric platform compelling greater imputus to one's gymnastic gyrations.
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