Speaking as someone who has designed and built a couple multihulls, it seems to me to be good practice to make the rig strong enough to survive a capsize
. Ordinarily that will mean that one can fly a hull
if one desires (or is careless) and conditions permit
, unless the boat
is seriously under-canvassed.
Put another way, good safety margins in rig design and structure to provide adequate margins for dealing with large waves means that by default the rig will be strong enough to fly a hull
in some wind
in the hands of someone who is careless or has high risk tolerance. For many heavy cruising cats, flying a hull requires "too much" sail area up.
Any prudent sailor should assume that his craft can be capsized, whether monohull
, catamaran, trimaran or proa. Also good to assume that the boat can be pitchpoled. If you have spoken at length with your boat's designer
and he clearly states that rig will blow off before a hull can be lifted, then perhaps you have a boat that cannot capsize
. Personally I would not trust such a boat.
A lightly loaded Gemini
can fly a hull. A Maine Cat
30 can fly a hull. A Gunboat can certainly fly a hull. So blanket statements about "cruising cats" being unable to fly a hull are unwise, because such statements can foster a false sense of security
in the unwary or inexperienced.