These cats rise onto foils and T-foiled rudders only at higher speeds. ==Sailing multihulls and workboats== The increasing popularity of catamaran since the 1960s is down to the added space, speed, shallow draft, and lack of heeling underway.
Until the 1960s most multihull sailboats (except for beach cats) were built either by their owners or by boat builders; since then companies have been selling mass-produced boats, of which there are more than 150 models. Small sailing catamarans are also called beach catamarans.
Vessels with slim hulls (typically multihulls) will normally create no appreciable bow wave to limit their progress. In 1978, 101 years after catamarans like Amaryllis were banned from yacht racing they returned to the sport.
Winning times dropped by 70%, since 1978.
Olympus Photo's 23-day 6 hr 58' 35" success dropped to Gitana 11's 7d 17h 19'6", in 2006.
Triple-hull configurations of small waterplane area craft had been studied, but not built, as of 2008. == Performance == Having a low displacement, and long, narrow hulls, a multihull typically produces very small bow waves and wakes, a consequence of a favorable Froude number.
Around 2016 the first large wind driven foil-borne racing catamarans were built.
A Swiss entrepreneur is attempting to raise €25 million to build a sail-driven quadrimaran that would use solar power to scoop plastic from the ocean; the project is scheduled for launch in 2020.
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