Kite · Pionieri

1984

L’aquilone gonfiabile viene brevettato

Bruno e Dominique Legaignoux depositano il brevetto di un aquilone con struttura gonfiabile che può essere rilanciato dall’acqua, il progetto su cui si fonda il kitesurf.

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US 4,708,078, Fig. 10 (1987) · pubblico dominio

Bruno e Dominique Legaignoux, due fratelli di Quimper, in Bretagna, erano appassionati velisti e avevano navigato in crociera fino al Senegal. Cercavano qualcosa di più veloce del windsurf, e un catamarano trainato da aquiloni li aveva fatti riflettere.

Il 16 novembre 1984 depositarono un brevetto francese per un’ala leggerissima a forma di segmento di sfera. La sua struttura era gonfiabile: un tubo sul bordo d’attacco e alcuni montanti trasversali, ricoperti da una tela flessibile. Due cavi di comando partivano dalle estremità dell’ala e passavano attraverso una carrucola sul trapezio del rider. Lo scopo dichiarato era un aquilone che si potesse lanciare dall’acqua senza aiuto esterno.

Nell’aprile 1985 lo presentarono alla settimana della velocità di Brest su sci di compensato costruiti in casa e vinsero un premio per l’ingegnosità. Nel 1987 fecero una dimostrazione con un aquilone di 17 metri quadrati alla World Cup di funboard, e il 24 novembre di quell’anno gli Stati Uniti concessero il brevetto.

Il bordo d’attacco gonfiabile diventò la base dell’aquilone moderno. Circa 75 brevetti successivi citano il loro.