I'm not sure an additional self-righting system, beyond the mast/boom combination, would be worth it.

  First, there's the cost, weight, and complexity of the hydraulic system.  Then there's the need to keep all components working and tested in a saltwater environment.  Then there are the extra hinges that take huge loads, representing an additional point of failure if something gives way.  In the end, the craft would likely be both slower and less safe overall.

  Assuming we've got a round pole that doesn't care where the wind is coming from, and we've reefed or stowed the main appropriately, there may not be much need to lay the lee hull and mast on the water. 

  You could probably keep the craft upright, even in extreme winds, with a pair of Jordan series drogues deployed off the sterns, dynamically adjusting one line longer than the other in order to change the angle of the boat to the wind.  That would also help prevent surfing and pitchpoling from wave action at the same time.

    http://www.jordanseriesdrogue.com/
    http://www.oceanbrake.com/

  A set of three drogues (two active, one spare) for a 3000 kg boat would be about $3,000 US and weigh less than 40 kg.  Plus, you'd probably want at least two series drogues anyway, even if there were no mast at all, so it's not necessarily much of an increase in weight or cost.

  I'd go for the simpler, lighter, cheaper, low-tech solution if possible. 

  That said, my drogue theory could be off.

        - Mike
 
 

 

I must clarify one point: rather than saying: “the load at each pivot mechanism will be 10 t”, I should have said that the design load must be at least 10 t given that this mechanism will be used when there is a risk of capsize, which implies that the loads could reach 10 t during the exercise.