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dmc silent bulb (top)

Silent Bulb

The Silent Bulb is an energy saving device designed to improve the propeller wake field. It is mounted on the rudder and positioned on the centreline of the propeller. This optional feature improves the water flow that comes from the propeller and increases thrust at higher loads.

Due to its specific design, the Silent Bulb is a fuel-saving device that reduces the cavitation risk on the rudder, which guarantees an extended lifetime of the rudder. The Silent Bulb reduces unavoidable flow losses of the propeller. It also increases the maximum propeller thrust. With an installed bulb, the propeller efficiency is significantly increased.

An optional feature of the Silent Bulb is the “Rudder Fins”. This energy saving device is mounted on the bulb to minimise the flow losses of the propeller.

Due to its specific design, the Silent Bulb is a fuel-saving device that reduces the cavitation risk on the rudder, which guarantees an extended lifetime of the rudder. The Silent Bulb reduces unavoidable flow losses of the propeller. It also increases the maximum propeller thrust. With an installed bulb, the propeller efficiency is significantly increased.

An optional feature of the Silent Bulb is the “Rudder Fins”. This energy saving device is mounted on the bulb to minimise the flow losses of the propeller.

Specifcations

ADVANTAGES

  • Increased thrust at high loads
  • Significant fuel savings up to 1.5 %
  • Reduces cavitation risk and noise
  • Excellent cost-performance ratio (amortization < 1 year)
  • Applicable to every full spade rudder type, both retrofit and newbuild

Application

Best suited to sea-going full-spade and semi-spade vessels with:

  • Speeds from 14 knots upwards
  • Big propeller hub sizes and high thrust loads

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