Our DIY self steering system is based on the rudder head mount (RHM)
pendulum self steering system developed by Jan Alkema. If it works, it will save us countless hours of hand steering.
Rudder head mounted self steering system, showing wind vane,
auxiliary rudder, pendulum oar carrier, pendulum oar and restraint line.
When boat gets off course, wind vane cants over, causing pendulum oar to swing out,
forcing auxiliary rudder to opposite side, thus steering boat back on course.
Showing wind vane canted to one side, pendulum swung out and auxiliary rudder
forced to opposite side.
Another angle showing pendulum oar swung to one side,
forcing auxiliary rudder to opposite side.
Wind vane assembly
Side view of wind vane assembly.
Close up of wind vane assembly. Donut-shaped disk is rotated to face vane in
line with wind, then red clamp holds it in place. When boat gets off course,
vane cants over, thus moving cords through pulleys which cause pendulum to swing
to one side, in turn causing auxiliary rudder to swing to opposite side,
steering boat back on course.
Top view of RHM self steering system, showing cords through pulleys that transmit
motion of wind vane to pendulum oar.