"Steve Lusardi" wrote in message
...
Larry,
All helm pump manufacturers equip their helm pumps with non-return valves
if
there is additional helm stations and/or an autopilot pump. So, this is
the
norm, not the unusual. You would not want the steering wheel to rotate
rather than the rudder move when in autopilot mode. Nor would you want the
wheel on the flybridge to turn the wheel in the wheelhouse rather than the
rudder. That is what they are used for, but they have a secondary effect
as
well and that is to prevent the rudder acting like a pump and kicking the
wheel. On sailboats, rudder feedback is a great tool in trimming the sail
plan for rig balance, so you would then want a manual valve where you can
turn on the feature with a lever if in rough water or when using an
autopilot. This is not rocket science. It is common sense. The double
pilot
bit is that the non-return capability must be on both of the oil ports of
the pump because either side could be IN and OUT, depending on wheel
rotation.
Steve

Thanks for the reply Steve.

So (if I understand correctly) I should make a few 'test runs' with a
'standard' hydraulic steering system (without a DPCV) and see how it reacts.
I'll just keep a tight grip on the wheel and see how much force is sent back
into the helm from rough water. That sounds like a plan.

I just don't want the wheel ripped out of my hand at 120 plus mph- not good.

Thanks, Larry