Maybe the sterns will be added later, that would explain the hollow transoms...
I was gonna say, "they not only forgot the drain plugs.. they forgot the transoms"
Probably more than transoms only.
The size limits are 90ft beam and 90ft static waterline, overhangs not included.
I tend to think that the fastest configuration within those limits would be a 90ft beam cat measuring about 180ft overall: 90ft waterline, about 45ft of stem overhang and about 45ft of stern overhang. The length/beam ratio of 180/90 follow the time tested 2/1 proportion used in almost all beach cats.
If the weight doesn't permit the combination of overhangs that long with a relatively short waterline body, the overhangs would be made shorter and curved foils would help with pitchpole resistance.
Looking forward for Alinghi 2.0!
