Originally Posted by damianham
Can you say what those complications are ?
The main issue is the bridge deck
connection. The complicated part is that the mast
sits right in the middle of this. On a mono the mast
frequently goes all the way to the keel
but this isn't possible with a cat. So you have your wires (stays and shrouds) pulling the mast down to keep it straight plus the forward pull of the sails
creates quite a bit of stress at the mast base.
The other issue is that the hulls want to splay out if not properly braced. Wharram did this with wood poles or beams just like the Polynesians. Typically the beam runs from the outside of each hull
to the outside of the other hull. Keep in mind that your mast cables
(shrouds) that usually attach to the outside of the hulls have a tendency to pull the hulls upward. That full length cross beam prevents this. The Flyin' Hawaiin does not have this so the hulls are splaying out without even a sail attached.