Originally Posted by rwhyman
As an engineer, care to explain this further?
Near 24 Deg is optimum and the number of solutions is great...perhaps 600 solutions on 1/4" increments for conventional width frames. One defines the height above the water of the oar handle, the depth below the water of the tip of the blade, and the height above the water of the center of the oarlock. Solve by similar triangles. There is an illustration on my site under rowframe.com/oars... that shows the variables awa basic assumptions. Below 24 degrees starts the an ever increasing violation of the 33% in-board rule and above the 24 deg is a reduced effectiveness of the paddle awa the energy to drive it. A few degrees each side still works quite well.
This is my argument against pipe chairs. Once you go up in height, the chair forces you into a new geometry which causes you to go buy new towers, new oars.... Thats my 3 cents GS