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Hellenic Navy - Gun Boats

From Dellner Brakes AB

Each of the eleven vessels is powered by 2 x Wärtsilä 16V25 main diesel engines which provide a total propulsion power of 7360 kW (10000 bhp). Each propeller shaft is equipped with a shaft brake system consisting of two Dellner type SKD 4x100 hydraulic disc brakes working on ø1100 mm (43.3 in) or 950 mm (37.4 in) brake discs. The brakes are pressurized with a pneumatic-hydraulic pressure intensifier. Brake torque generated is approx. 200 kNm (1,770,000 lbf-in) depending on disc size and the applied pneumatic pressure. The purpose of the brakes is to quickly stop the propeller to change the direction of rotation and to hold the propeller shafts locked during maintenance.

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Electric Brakes
Electric brakes are assemblies consisting of electrical elements for the slowing or stopping of shafts in equipment drives. Electrical power is required to activate the brake.
Pneumatic Brakes
Pneumatic brakes are assemblies consisting of elements for the slowing or stopping of shafts in equipment drives. Air is required to activate the brake.
Linear Brakes
Linear brakes are used to slow or stop linear motion in conveyors, web systems, and vehicles.  Technologies include friction, eddy current braking, and hysteresis.
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Topics of Interest

Shaft brakes are used to stop and hold the propeller shafts in case of an emergency. Each propeller shaft is equipped with two Dellner Brakes type SKD 4x100 pressure applied caliper disc brakes...

Each propeller shaft is equipped with a Dellner Brakes model SKD 4x100 pressure applied disc brake operating on a ø1050 mm (41.3 in) brake disc. The primary function of the brake is to hold the...

Length 294 m (321.5 yd). Propulsion power 39 MW (52,300 hp). Max speed 24 knots. Maximum number of persons on board including the crew is 3450. The brake system for each ship consists of two Dellner...

The propulsion brake systems on Queen Mary 2 consists of four Dellner model SKD 100 hydraulic pressure applied brakes working on a brake disc ø1300 mm (51.18 in). Each Mermaid Pod uses this system,...

Each propeller shaft now has installed one Dellner Brakes type SKD 65 pressure applied disc brake operating on a 600 mm (23.6 in) diameter brake disc. With 59 bar (856 psi) hydraulic pressure to each...