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| Dropzone.com : Thermals 101: A ParagliderÂ’s Perspective (1113 words) |
 | I have been told to study a 1970 hippie lava light, as the rising lava in the light is nothing more than a thermal. |
| Again, think of the lava light – as the lava rises, the oil fills the void where the lava was. |
| Paragliders are rated by DHV ratings, 1 thru 4 where 1 is the safest to fly, which rate their handling in stalls and collapses. |
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