Cats are far far less "flippable" than monos - Far less. CJ MArchaj indicates that the comparative roll moments of inertia
If we call the average mono as a value of 1 (.65 is the rig, .15 the hull
, .15 Ballast and .05 other)
then the "average" cat has a value of 2.03 rotating on centre point, and once rotating on hull
a value of 3.69.
As well as demonstrating that, the work also was interesting in that it showed that the rig contributed so much to roll moment. Indeed the work demonstrated why once a mono rolls, if it self rights before it sinks, if it loses a rig in the process then it is likely to roll much easier , i.e. using the 1 as the mean a mono without rig drops to .35 - or put another way, if mono without rig is 1, then mono with rig is 3ish, cat on centre line is 6.5 and cat on one hull is 10.5.
Please dont attack me on this work, if you disagree take it up with Marchaj or the report of the US Yacht racing
union and the US society of naval architects and marine
I am not saying that all monos will flip sooner than all cats, what I am saying is that the research
shows a particular position and illustrates interesting data about the effect of rigging
on rolling over.