Used sails from other boats?

[jssailem]

If only I could find big wind on flat water...

Wait for a big east wind. Then you might get your wish.

 

[DrJudyB]

So to clarify - in light of the fact that it is scientifically provable that the physical weight of a sail will put more stress on the rig, then we assume that the amount of added weight must be negligible when compared to the righting moment of the boat?

Yes, that is correct.

It appears to me, based on Dr Judy’s info, that the boats righting moment is what controls the design engineers standing rig requirements.

Yes, that is correct.