Page 354 - Lewmar

9. Steering

Cobra™ Systems

With over 40 years technological development, Cobra™ has become the fi rst choice for boat builders worldwide for aft
cockpit vessels. Cobra™ systems are the world leader in terms of performance, reliability and appearance for Rack and Pinion.

▪ Typically designed for aft cockpit boats with a short distance between the helm and the rudder

▪ Simple installation providing a direct feel
and rudder response
▪ Adaptable for twin helm / twin rudder solutions
▪ Compact installation for boats with
minimal space available
▪ Strong and light – no parts to fret or chafe

▪ Minimum maintenance
▪ Smoother operation
▪ Greater torque capability
▪ Full CE Certification available

Principle of Operation
The principle of the Cobra™ steering system is based on the precision gearcut circular
rack and pinion in the head of the pedestal providing the necessary mechanical
advantage (see wide angle geometry). The quadrant gear is connected to a stainless
steel downtube, at the base of which is an output lever. This connects to a similar
lever, mounted on the rudder stock, via a fully adjustable draglink.

All shaft work is carried through high-effi ciency sealed ball races and the mesh of gears
is controlled via shims under the input, eliminating any lost motion. The input socket
also houses a powerful and progressive friction brake for dampening the wheel, when
at anchor, for example.

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