Matt Colie wrote in
news:

otnmbrd
I did not say multiple motors, I said steering engines (admittedly
misspelled). The vast majority of ships out there have ONE Steering
engine. That is one single hydraulic unit that may have twin circuits
(most do not) but most do have two motors for two hydraulic pumps.
This even goes for the rare twin shaft/twin rudder ship. Those that I
have run have that do have twin rudders still have a single steering
engine with the requisit two pumps. This new class of Double-Doubles
actually have two steering engines - one per rudder. What I have not
confirmed is if this class still has the redundent hydraulic pumps on
each steering engine.
Matt Colie


Possible question of semantics as well as aging memory.
I think I see what you are talking about, but I need to check something, as
I think the required redundancy runs further down the system than you are
saying.

otn