Windsurf · La rivoluzione del funboard

1984

I camber inducer danno alla vela un profilo alare fisso

Il progetto di Jeffrey Magnan per Gaastra collega le stecche all’albero, così che una vela da regata mantiene il suo profilo alare invece di assumerlo sbattendo al vento.

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US 4,686,921, Figg. 4–6 (1987): vista dall’alto all’altezza dell’albero, l’attrezzatura, il camber inducer · pubblico dominio

Una vela morbida prende la sua forma dal vento e la cambia al variare del vento. I regatanti volevano l’opposto: una vela che mantenesse un profilo alare profondo e fisso, come un’ala. La risposta fu il camber inducer.

Il 28 marzo 1984 Jeffrey J. Magnan depositò un brevetto, assegnato al velaio Gaastra, per quello che chiamò un apparecchio ad ala flessibile. Le stecche della vela sono collegate all’albero tramite raccordi girevoli, così che vela e stecche possono ruotare intorno all’albero durante la virata, la curvatura della vela si può regolare con il tesabase e il flusso d’aria sull’albero resta regolare. Il brevetto statunitense fu concesso nel 1987; fu depositata anche una domanda internazionale con la stessa data di priorità.

I camber inducer diventarono una caratteristica delle vele da regata. Nella letteratura sul windsurf il nome dell’inventore è talvolta scritto Magnum, ma tutti i brevetti riportano Magnan.