I am currently conducting a project where a yacht will be suspended in air by two straps which are connected together by two poles. The poles will be mounted on a barge and therefore I want to find how I can relate the angle of heel ([itex]\varphi[/itex]) to the two angles. Although the yacht will remain upright and not heel with the motion of the barge, due to its keel, it is free to slide along the strap to the most natural position. I attached a simplified 2D sketch of what I mean. In the level condition θl = θr. Any insight or where I can look to find the solution to my problem would be greatly appreciated!