| 摘要 |
An adjustable weight ballast (w) for lighter-than-air balloon with a predetermined lift is disclosed, having at least two individual weights (14). There is a first means (16) on each individual weight for selectively attaching two or more weights to each other to form a composite weight having a total weight at least equal to the predetermined lift of the balloon, and a second means (12) for tethering the lighter-than-air balloon to this composite weight, in which manner a ballast for a ballon can have its weight incrementally adjusted to an amount just greater than the balloon's predetermined lift thus securely tether the balloon to a surface (s) on which the composite weight is supported without significantly exceeding the lift of the balloon.
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