Consult Jastram GmbH & Co. KG’s Jastram Model H Helm Pumps brochure on NauticExpo. All other pumps have a 1/2″ NC stainless steel wheel bolt. HELM. Nov 23, This Pin was discovered by Meg Jastran. Discover (and save!) your own Pins on Pinterest. SILVER. The Restless Metal. ROY W. JASTRAM. University of Califomia, Berkeley. A RONALD PRESS PUBLICATION. JOHN WILEY & SONS, New York.

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The two main features of the Digital Wheel over the standard electric wheel are:. DW shaft dimensions are: Engineering for Life At Sea Jastram Engineering is built on the understanding of how critical steering is to the operation of any vessel.

The comfort and safety of the vessel and crew is in part dependent on how well the steering system functions.

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For Supertankers Supertankers and cruise ships have maritime pilots who act as valets for the giant vessels in ports The RFU features a high quality potentiometer with heavy duty gears, and a built in electronic driver board.

Their rugged steel construction includes many standard features resulting from our long jastra in the manufacture, operation and service of steering systems. The stainless steel ring in the propeller tip jetal protects the tunnel against cavitation damage.

The two main features of the Digital Wheel over the standard electric wheel are: Exceptional Performance We design and manufacture marine steering systems to the highest quality standards. With worldwide representation and an in house ability to communicate in nastran languages, customers can be assured that any question will be answered quickly.

This motivating force is why Jastram is compelled to design and manufacture jaztran the highest quality. Anti-suction tunnel AST — a second smaller tunnel installed behind the bow thruster to increase the thrust during cruising. Matching of ram capacity to rudder torque provides effective steering at the least cost. We design and built according to all major marine classification rules and requirements.


The RFU outputs both a rudder angle indicator signal and rudder feedback signal, as well as an optional second independent second rudder angle indicator signal. Alignment with shims and preparation of flat mounting beds are not necessary.

Two types of devices are available for the RFU to generate the feedback signal: The T-ram assembly mounts directly on the rudderstock and self-aligns, supporting its own weight. They provide a proven, trouble free system for all types of commercial vessels. When taking over control of the steering system the Digital wheel takes over at the present position of the rudder.

Transverse Thrusters

Jastram S Model Actuators are specifically certified for use in commercial marine hydraulic steering systems. Commitment to Quality Jastram Engineering is well known for its commitment to quality, from initial design continuing through the manufacturing process to system commissioning and after sales service.

The RFU is built with cast aluminum and stainless steel and designed for heavy duty use in both commercial and pleasure crafts. The range is influenced by the respective installation design.

Jastram are specialised in fixed pitch propeller FPP thrusters which require minimal servicing due jaztran their solidity and durability. Setting the Standard in Marine Steering Jaztran. Jastram T-Ram Steering Systems are exceptionally tough and reliable.

Reliable gears, worldwide service, direct contact to our service department and detailed archived data for each delivered system are well accepted by the maritime industry and international shipping companies. Powerunits are available to meet specific design challenges or requirements of the vessel owner, naval architects or shipyard. T Ram Rapson Slide Actuators. Impressed current cathodic protection ICCP instead of anodes for longer life and reduced resistance in the tunnel.


Transverse Thrusters

The propeller is mounted with a tight oil press fit which allows rapid mounting and dismounting during shaft seal changes. Under power steering, the steering wheel is turned producing a rudder command signal.

The jadtran lubrication system with oil level sensor to be installed by the shipyard above waterline protects the seals against water ingress.

The T-ram is a complete self-enclosed steering unit that provides fast rudder movement through midships and maximum torque at the hadvover positions. In the event of a power failure the digital helm seamlessly transfers to manual hydraulic steering. For those vessels where space is a large concern.

In essence, they start and stop the electric motor which drives the hydraulic pump powering the steering gear. The RFU features a high quality, long life potentiometer with heavy duty gears. Up to five indicators can be used with a mixture of forward and reverse scale meters. Jasrran two torque struts arm are required to connect the T-ram to the vessels hull structure. Digital Wheels are unique input devices which provide full follow-up digital electric control. Rudder Feedback Unit Jastram B Model Actuators are double-acting equal displacement cylinders metsl are directly connected to a tiller.

Under emergency manual hydraulic steering the numbers jastrah turns depends on the size of the actuators. The RFU is built to resist water and damage caused by vibrations from rough seas and mechanical systems. When the steering lever is moved to the desired rudder angle, the rudder will follow-up.