SeaStar/BayStar Hydraulic Steering: Selecting the System

Selection Guide
The objective is to match the steering system to the requirements
of the vessel. This depends on four things;
1) hull type (ie: planing or displacement),
2) type of propulsion system in the vessel (ie: inboard, outboard,
sterndrive, etc.),
3) the number of engines or rudders, and
4) the total power of the engines (ie: Horsepower).
Once the system and cylinder has been selected, the size of the
helm pump must be determined. SeaStar systems also allow the
following options to be specified;
1) the number of steering stations,
2) helm configuration (ie: standard or tilt helm),
3) additional features such as autopilots, and
4) power assist.
Notes on Steering Response versus Steering effort
Steering wheel effort is directly proportional to the number of wheel
turns lock to lock.
The number of wheel turns lock to lock is dependent on three things;
1) the volume of the cylinder,
2) the displacement of the helm pump,
3) the allowable movement of the rudder or drive unit.
Less wheel turns lock to lock results in more steering effort. More
wheel turns lock to lock results in less steering effort. However,
additional factors that can influence steering effort are;
1) vessel speed,
2) rudder size,
3) unusual propeller selections,
4) hull type (ie: displacement, planing, etc.),
5) improperly aligned counter balance skeg,
6) trim/position, and
7) propeller height relative to water.
Selecting the System
Recommendations made in this selection guide are based on our
experience with typical installations, applications and usage. Do NOT
use products in applications that they were not intended for. It is the
boat manufacturer and the installer's responsibility to ensure the
components selected are sufficiently validated on the boat application
for safe and acceptable operation.