Steering systems assembly diagrams


 

It is essential to install our devices on solid structures.
Indeed, a cockpit bottom or a bulkhead which are not intended to receive a steering gear are generally too flexible ; they should be strengthened.

 

Transmission by pulleys

The sheaves must work in the plane of the wire & chain to avoid the hard points and premature wear. When everything is in perfect alignment, secure the pulleys including those of the counterpart by locking the needle screws with an Allen wrench.

For wire & chain use an extra flexible cable of diameter 6 mm. The tension must be sufficient to erase the bit of play but too strong it will give "hard" to the installation. Lubricate the wire & chain with light oil and check that all the sheaves are well greased. Bearing models are lubricated as standard.

 

 

1 Station 1 Rudder blade

Montage AG_1

The most frequent case on modern sailboats. The alignment of the wire & chain consists in raising or lowering the quadrant on the rudder shaft. If the area is located at the front of the wheel, do not cross the wire & chain.

Montage AG_3

When the rudder shaft is inclined or in the event of an obstacle, the lateral pulleys are mounted on the same plane as the quadrant.
 

1 Station 2 Rudder blades

Montage AG_2

Applies to catamarans and bi-rudder monohulls. The wire & chain connecting the two quadrants can be replaced by a rigid bar if the architecture allows it.

Montage AG_4

To reduce costs and weight, it is possible to operate only one quadrant with the wire & chain ; it then drives a rudder shaft arm thanks to a rigid bar.
 

2 Stations 1 Rudder blade

Montage AG_5

Facilitates traffic between the transom and the cockpit. Current installation on cruising monohulls 40 feet or more.

map

When the rudder shaft is inclined or in the event of an obstacle, the lateral pulleys are mounted on the same plane as the quadrant.

Ideal case : the 4 pulleys and the wire & chains are on the same plane.
 

2 Stations 2 Rudder blades

mip

Case where the 2 rudder blades are parallel. The wire & chain that connects the 2 quadrants can be replaced by a rigid bar.

Case where the 2 rudder blades form an angle. The sheave and the wire & chain located between the two quadrants can be replaced by a sheathed wire & chain.

 

Sheathed cables transmission

Alignment is simpler than with pulleys. However, it is necessary to find the most direct circuit possible, since the friction results more from the number and the hardness of the bend radius than from the length of the sheathes. If the bend radius is too small, the solution is to cut the sheath and insert a sheave. The bend radius must not be smaller than 300 mm. The wire & chain can be lubricated with light oil before introduction into the sheathes and must be less strained than for an installation with pulleys.

 

 Montage_AG_10  
 
 
 
Sheathed wire & chains : applies to sailboats which have a low torque of rudder shaft and whose interior layout would impose a complicated driving circuit that would require more than 6 return pulleys. This type of installation facilitates assembly.
 
 
 
Quadrants : In any cases, each wire & chain must work in the plane of the groove of the corresponding quadrant. The locking nuts of the 4 bolts must be carefully secured. It is imperative to place stops to limit the stroke of the quadrant.

 

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