Then you answer this :

-1- What is preventing me from adding a jib in addition to moving all that sail area into the mainsail ?

-2- Why are the most succesful catamaran classes like the F18's and Hobie 16's not uni-rigs ?

-3- Why do all modern boats have spinnakers when obviously putting all that spinnaker area in the mainsail is more efficient ?

-4- Why aren't all A-cats using the C-class solid wing sails ?

-5- Why has the A-cat class actively banned full foiling ?

-6- Why aren't the A-cat using spinnakers ?

-7- Ergo why is the A-cat class the way it is ?


I'm guessing your answer to all these questions is :"Because area in the mainsail is more efficient"

My answer is "Because the A-cat class members have written the rules such as to actively encourage the way the A-cats are designed now." Sometimes they have done because that is faster, sometimes they did it for wholely different reasons."

Ergo, looking at the A-cats is not always proof that something is better or more performant.

Wouter