Quote: "Does any one happen to know the max righting moment for an eastward ho 24?"
The righting moment is defined as the horizontal distance twixt a perpendicular through the boat's Centre of Gravity and a perpendicular through the boat's Centre of Buoyancy multiplied by the boat's displacement
, and that distance changes from second to second. Therefore it is of no particular interest to a skipper
. True enuff - it has a maximum value, but what that is, is of no consequence to a skipper
I rather think you are thinking of righting FORCE. What that is depends on the size of the boat and a host of other things, since one of the elements in the calculation of righting force is the volume of the hull that is submerged, i.e. the momentary displacement
. There again, why would you care? You can take it for a dead cert that it's ADEQUATE. Else the boat would go glug-glug! You can also take it for a dead cert that it is equal at any given fraction of a second to the force of the wind
resolved to act through the rig's Centre of Effort as it exists from second to second. When it is not, the boat simply changes its angle of heal and bring the two to equallity. Skipper needs to do nothing about that.
So are you worried that at RM(max) the Righting FORCE, opposing the pressure of wind
in the sails
, will rip out your chainplates or in some other way bust you standing rigging
I think you can take it for granted that the standing rigging
including chainplates are adequate for anything you can throw at them. By the time you are heeled so far that RM(max) heaves into sight, you'll have wet your knickers, and not necessarily with briney, or you'll have started sheets
The Eastward 24 has a SA/D about the same as TrentePieds, i.e. she is "permanently reefed", and you can take it for a dead cert that in standard configuration, and "as designed", she'll take better care of you than you can of 'er. If your rig, as designed and built, has been well maintained, you have nothing to worry about, and you should go sailing instead of treading the boat's designer
on the toes :-)
Now if you have, say, crevice corrosion
in a rigging screw - THEN it's worth your while to worry. But that has nothing to do with the theoretical aspects of rig design.