...I always thought the limiting factor was being able to hold the boat down. I have to start spilling air out of the sails long before the lee hull starts to dig in to deep. But in some posts people have said that their limiting factor is the lee bow diving.
So what is it, does it differ by boat?
I guess you want to know if the limiting factor is the max roll torque or the max pitch torque. In this case, the limiting factor depends on each boat's geometry, mainly the beam size and bow volume.
- Large beams mean lots of roll torque resistance - the boat buries the bow before capsizing.
- Large bow volume mean lots of pitch torque resistance - the boat capsizes before burying the bow.
An ideal design would always reach both limits at the same time, but in practice this is impossible to achieve. The same boat may be capsize prone in certain conditions and pitchpole prone in other conditions.