1. Becker Flap Rudders with KSR Support (FKSR)
2. Becker Flap Rudders (SA&SC) for smaller vessels
3. About KSR (King Support Rudder)
   

Becker Flap Rudders with KSR Support (FKSR).


Becker Flap Rudders with KSR support guarantee the best possible manoeuvrability for your vessel at all speeds and at the lowest possible rate of fuel consumption.

• Optimum balance and flap area
• Minimum steering gear size
• Highest insurance against flexural vibration, best values of natural vibration
• Rudder angles of 45° and additional 45° of the flap, in special execution rudder angles of 65° and additional 45° flap angle may be applied
• Easy maintenance of link and hinge system
• Highest safety against cyclic stresses
• Durable in ice

he FKSR Becker Flap Rudder is the ultimate rudder solution when it comes to ship manoeuvrability. With decades of research, development and practical experience behind it, this rudder is the most mature design of all flap rudders in the shipbuilding industry. Optimised profiles, rudder balance, deflection ratio between rudder blade and flap, hinge and link systems guarantee a reliable and efficient tool for your vessel.



Often copied but never equalled, the combination of all these outstanding features ensures a superb rudder. Rudder angles of +/-45 degrees and additional 45 degrees of the flap permit extreme manoeuvres and dynamic positioning operations. Each ship is different and for some rudder configurations rudder angles of 65° can be applied if a benefit for manoeuvring is expected. Also attractive is the improved course keeping performance and fuel saving obtained through smaller required rudder angles and smaller rudder area, compared to standard rudders. In combination with the Becker KSR Rudder support, the FKSR Becker Flap Rudder has no size limit.

Due to the extreme efficiency of the flap rudder we always recommend having our experienced engineers onboard for manoeuvring training during sea trials.


TOP

Becker Flap Rudders (SA&SC) for smaller vessels.

Becker's SA and SC type Flap Rudders provide all the traditional advantages of the Becker Flap Rudder design:

• Optimum balance and flap area
• Minimum steering gear size
• Highest insurance against flexural vibration, best values of natural vibration
• Rudder angles of 45° and additional 45° of the flap, in special execution rudder angles of 65° and additional 45° flap angle may be applied
• Easy maintenance of link and hinge system
• Highest safety against cyclic stresses
• Durable in ice

Heel-supported SA type Becker Flap Rudders are economic systems for small and low speed vessels. River boats, supply vessels, tugs, fishing boats and research vessels are all ideal candidates for this rudder solution. This design reduces loads on the neck bearing and the rudder carrier.

The SC type Becker Flap Rudder is a flap rudder without KSR support for smaller vessels, whose size do not require KSR support (e.g. smaller ferries, offshore vessels, etc.).

Due to the extreme efficiency of the flap rudders we always recommend having our experienced engineers on board for manoeuvring training during sea trials.


TOP

About KSR (King Support Rudder).

The KSR (King Support Rudder) design extends the trunk into the rudder blade and makes it possible for Becker’s full spade rudders, such as the TLKSR® Twisted Leading Edge Rudder, the FKSR Flap Rudder or the Schilling® KSR with unchallenged manoeuvrability to be supplied for vessels of any type and size. With the KSR design Becker can supply full spade rudders of practically any size.




Becker rudder profiles for the KSR design:

• Becker Twisted Leading Edge Flap (TLFKSR)
• Becker Twisted Leading Edge (TLKSR®)
• Becker Flap (FKSR)
• Schilling® KSR
• NACA (KSR)

In order to avoid typical disadvantages of conventional rudders, Becker Marine Systems has developed the KSR (King Support Rudder) bearing arrangement concept. With this arrangement the trunk is extended into the rudder blade so that the lower neck bearing is positioned as close as possible to the vertical centre of pressure on the rudder. This results in reduced stresses and bending moments in the rudder blade as well as in the rudder stock.

The reaction forces in the neck and carrier bearings are much smaller, making it a very rigid rudder and with a consequently high natural frequency above the exciting frequency of the propeller, making the risk of the resonance very unlikely. Vibrations are reduced to a minimum.


TOP