Light sails, sheeting:
Never sheet light balloon or running sails; let them sheet themselves. If you trim these sails the way you do working canvas you will destroy much of their power. To get the sail right, slack off the sheet until the luff trembles, then belay. If you sheet them, the whole after angle becomes a back sail. The object is to get them to pull ahead, not sideways. The minute a balloon sail has to be sheeted aft to make it draw take it in and set your working canvas. You will do better with it.