Example 165 shows a twin wheel, single rudder transmission steering system. The advantages over a cable system are:
- a more robust and strong system
- easier to install as no alignment has to be made due to the universal joints in the torque tubes and the rose joints in the draglinks
- proportional steering reduction for more precise steering in the midships position (see this link)
- easy autopilot drive integration
- less friction as the system isn't under high pre-tension all the time
Please click on the image to open a 3D PDF model in a separate window. By clicking on it and holding the left button while moving, you can rotate the model.

Example 166 shows a twin wheel, single rudder transmission steering system as used on a production yacht (Hanse 630). The traverse eases the installation and the gearboxes can be moved up and down to tension the chain. Please note the integrated autopilot drive unit.
Please click on the image to open a 3D PDF model in a separate window. By clicking on it and holding the left button while moving, you can rotate the model.

Example 167 shows a twin wheel, single rudder transmission steering system as used on a production yacht (Najad 440). The yard made pedestals accept BS25 bulkhead steerers to chain drive the BRG10-50 reduction boxes. This system is also fully redundant.
Please click on the image to open a 3D PDF model in a separate window. By clicking on it and holding the left button while moving, you can rotate the model.

Example 168 shows a transmission routing on a 80 foot cruiser-racer. The system is fully redundant and both reduction gearboxes can accept an autopilot drive.

Example 169 shows a transmission routing on a 70 foot cruiser. The system covers long distances which would have been very difficult with a cable system. Both steering positions end in a central reduction gearbox with autopilot drive unit.

Example 170 shows a transmission routing on a 78 foot cruiser. The system covers long distances which would have been very difficult with a cable system. Both steering positions are first joint together and end in a central reduction gearbox with autopilot drive unit. Note that the complete system is mounted to the deck of the ship.

Example 171 shows a transmission routing for a 60 foot cruiser. Both steering routings follow the cockpit sides and join the reduction gearboxes, mounted on the main aft bulkhead. The system is fully redundant and with twin autopilot drives, also fully redundant on autopilot.

Example 172 shows the flexibility of a transmission system. As the RG10-70 1:7 reduction gearbox can be equipped with up to three input shaft, two can be used for each steering system and the third for the drive unit.