{"id":1459,"date":"2020-12-01T03:59:16","date_gmt":"2020-12-01T01:59:16","guid":{"rendered":"https:\/\/parapente-mexico.com\/?p=1459"},"modified":"2021-10-06T08:32:14","modified_gmt":"2021-10-06T06:32:14","slug":"charge-alaire","status":"publish","type":"post","link":"https:\/\/parapente-mexico.com\/en\/mecanique-de-vol\/wing-loading\/","title":{"rendered":"Wing load"},"content":{"rendered":"

To fully understand the wing loading<\/strong>, I often ask this question when I discuss the mechanics of paragliding flight:<\/p>\n

Obelix and Asterix fly under the same paraglider (same size), who goes the furthest?<\/p><\/blockquote>\n

Definition of wing loading\"Asterix<\/a><\/h2>\n

The wing loading is a ratio between the PTV (total flying weight) and the area of the wing.<\/p>\n

= PTV \/ Surface<\/p>\n

It is therefore expressed in kilogram \/ m2<\/sup><\/strong>.
\n<\/sup>
\nThe average wing load of a solo paraglider is around 3.5 kg \/ m2.
\nIf you fly in a two-seater, the wing load is then greater, around 5 kg \/ m2\u2026 and you can feel it in the controls, particularly if the passenger is heavy!<\/p>\n

In delta, it is even higher, from 5 and up to 10 for the most efficient models.
\nThe reason is simple: at the same weight of the pilot, the surface of the glider in hang-gliding is much less than in paragliding.
\nThe hang glider creates less drag, so it doesn't need to create as much lift as a paraglider.<\/p>\n

Wing load and speed<\/h2>\n

For a given PUL (Ultra light glider, therefore delta<\/strong> Where paraglider<\/strong>), the manufacturer establishes a weight range.
\nFor example, for a given paraglider model and a given size, it could be 75-95 kg.<\/p>\n

Depending on whether we are at the top of the weight range (here 95 kg) or at the bottom (75), the behavior of the wing will be different, because the wing load will vary, mainly due to the variation in weight. of the pilot.<\/p>\n

If Obelix weighs twice the weight of Asterix, and Asterix flies at 35 km \/ h, what will Obelix's speed be, if he borrows his paraglider?<\/p>\n

Let us recall two equivalences making it possible to obtain the RFA (Resultant of the Aerodynamic Forces):<\/p>\n