silver-fox
Well-Known Member
I have been looking at self steering systems and it struck me as strange that Hydrovane don't have any imitators. (The thought was provoked by the high price of what is a relatively simple bit of engineering and a desire to see a bit of competition bring the price down)
There is a wide variety of servo pendulum makes to choose from but, it seems, just one Hydrovane. It can't be a patent on the basic design because they have been making them for over 30 years.

There is a wide variety of servo pendulum makes to choose from but, it seems, just one Hydrovane. It can't be a patent on the basic design because they have been making them for over 30 years.