Catamaran steering examples
transmission steering



 Example 240 shows the ultimate in catamaran steering: the transmission rod steering. This steering system will give the absolute best helm control possible on a catamaran. The friction in the system is extremely low as all parts run on ball bearing resulting in an optimal responsive system which will transmit all wind shifts or situation changes directly to the helmsman. The system is very easy to install: The gear boxes (bevel boxes and reduction gearbox) are mounted to the hull and the universal joints accept for all misalignment and work in pairs between two gearboxes. The end result is absolutely the best there is, as stated by Swiss Catamaran Concept manager Christophe Buholzer "Yes we are very pleased with your system, i have spoken highly about it, at the various shows we exhibit."


At the wheel side, the system starts with a steering bevelbox via 2-way, 3-way or 4-way bevelboxes, the system drives the forces to the reduction gearbox. Between the gearboxes pairs of universal joints are connected to torque tubes (yellow). Bulkheads can be passed with special self-aligning roller flange bearings (green). The reduction gearbox drives the rudder via two levers (red) and a draglink (yellow).

Please click the below image when you want to open a 3D model of this system in Adobe PDF format. You can look at the model from all sides.



Example 241: 57 foot catamaran with one central steering position, high on top of the deck. The distance from the steering position to both rudders (routing) is very long which is ideal for the transmission steering system. In the middle of the aft beam, the autopilot drive motor is mounted. The alternative position is one bevelbox further in the steering wheel direction.


The layout of the steering system. All possible parts are made from high strength aluminum AL6082 toachive the maximum in strength and minimum in weight.

Please click the below image when you want to open a 3D model of this system in Adobe PDF format. You can look at the model from all sides.