Foils to the cat!
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The man behind the fixed foils for fast catamaran vessels is Prof Hoppe from the Stellenbosch University in South Africa.
Commercially you need to contact Gary Vos of Hydrospeed on
gvos@iafrica.com.
The beauty of a cat hulled vessel (apart from many others) is the flexibility towards speed.
Due to the extreme slimness of the hulls (1/20 in many good designs) allows for variable speed options related to installed power, which is not possible with monohull hulls where you have to make a choice from the outset (displacement or planing).
Referring to the TRY 100 by Lars Modin for our large cat project, speeds of 15 kts cruising will be obtained with quite modest power units.
Increasing the power would allow to increase speed to say 25 kts; at these speeds the foils become an interesting option.
Relative to the Kingcat: I made the contact between the Kingcat owners and Gary Vos which led to the installation of foils with great success.