Directional Stability Test of Stepped Hull Planing Boat

The video is one run of a test conducted on 3 different twin and single stepped planing hulls in order to develop the bare hull hydrodynamic derivatives. The tests were conducted to answer the question, Are stepped planing hulls inherently unstable in yaw.

[@SydwayzMonsoon]

Do you have details or pictures of what the bottom of that hull looks like? How many steps?

[@froudedude]

two steps in a prismatic hull with a 15 degree deadrise, set at about 33 and 66 % LOA