From the after reports of the last AC, they said the ground crew just to handle the wing, step it every day, take it down every night, store it, tweak it, etc. was about 100 people...for each team! They said that was the single biggest expense other than building the boats.

I'm just wondering how much faster it makes the boats? It's got to be a lot heavier than soft sails, so you have to offset the weight of the wing vs. the added performance it brings. Where is the break over in terms of performance?

Seems the smaller foiling cats go pretty fast with soft sails!