jfm
Well-known member
That's an newish product maybe since about 2019/20 (?) - I love it. The software allows the rudders to turn at slightly different angles (the inner one turning tighter) . In a nerdish way that is quite cool.One thing I did notice on the F55 which kind of relates to the auto pilot is the treatment of the rudders. Rather than a central ram system they seem to have independent servo motors on each rudder.
Ferretti group use these and Sanlorenzo, plus probably many others.
There is one trade off to make, which is that if you turn the rudders independently at different angles you have no tie bar, so if one side fails the other motor can't drive it, whereas if you use a tie bar you have that redundancy. I wouldn't criticise either choice, but tend to prefer to take the risk and let them turn at different angles, with no tie bar. Unfortunately Sanloz don't agree so I'll have a tie bar
A big benefit of all this is no hydraulic hoses going from steering wheels to rudders. The steering wheel is a rotary actuator and it's fly by wire. There's no hydraulic steering unit and PTO in the engine room, no hoses, no autopilot pump and solenoid valves, etc. That's a major saving in materials/ build time/weight/energy consumption.
It's now on outboards too - my new Yam will have fly by wire steering, by an electric motor and leadscrew built into the outboard, and that means with a little black box plugged in has an autopilot, Merc/Verado same.
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