Page 24: of Maritime Reporter Magazine (February 1994)

Thrusters, Water Jets, Propellers & Gears (Continued from page 33) sels from 16- to 90-feet, attaining speeds of 20 to 50 knots.

The Traktor jet units from North

American Marine Jet operate at 100- to 600-hp and are for vessels from 17- to 150-feet, attaining speeds from (To the left): Lips water jets five to 20 knots.

Propellers

Known worldwide for its propel- ler production, Bird-Johnson Co. now offers water jets from 400 to 9,000 kW, built under license from

MJP Marine Jet power.

The units reportedly offer high

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Circle 211 on Reader Service Card

FROM TUGS ON THE MISSISSIPPI

TO FERRIES IN THE FAR EAST....

Tugboat, Barge, Ferry and Workboat operators are discovering the advantages of Thrustmaster's Rugged Hydraulic Outdrives.

ADVANTAGES LIKE:

C Self contained unit allows for ease of installation, greater design freedom and ability to be moved to another vessel.

C Automatic kick up to guard against damage and facilitate servicing... without drydocking.

C Unparalleled performance and versatility with little, if any, maintenance problems. 3 360° steering and propeller speed control without changing engine speed. 3 Optional "Power Lift' to adjust for draft variations.

Manufactured in USA to your specific requirements, backed by experienced service personnel, spares readily available.

To check out all of the

Thrustmaster advantages call: 713-937-6295

Fax: 713-937-7962

Thrustmaster of Texas, Inc.

P.O. Box 840189

Houston, Texas 77284-0189 efficiency, low vibration and feature advanced reversing/steering & con- trol systems.

Bird-Johnson also offers interme- diate controllable pitch propeller sys- tems from 500 to 5,000 hp, systems which were designed for affordability and ease of installation and servic- ing.

On the inland front, Bird-Johnson offers the "New Generation"

Workwheel Series, a five-blade pro- peller designed to optimize the per- formance of workboat wheels. The

New Generation series—which in- corporates technology routinely used in the design of large commercial and military propellers, the com- pany announced—features: .60 blade area ratio, approximately; optimized variable pitch distribution; and non- linear blade skew.

The bottom line benefits accord- ing to the manufacturer: a two to five percent increase in propeller efficiency; approximately 50 percent reduction in ship vibration levels due to propeller-induced unsteady hull pressure; and an approximately 50 percent reduction in ship vibra- tion levels due to propeller-induced unsteady shaft forces.

Another propeller manufacturer with a well-established reputation is Rolla SP Propellers.

The company is presently involved in a number of fast propulsion and propeller system projects, custom designing and manufacturing sur- face piercing propellers for military projects such as: the Trinity Ma- rine-built "XFPB" for the U.S. Navy and Mexico; Peterson Builders' "US

Navy Mk V" Cougar Cat; McDonnell

Douglas' "Magnum 40;" and Swede

Ships' "Swedish Customs."

Voith Schneider America, Inc. touts not only its vast array of prod- ucts, but also its pre- and after-sales service.

The company offers engineering, production, R&D, testing, consult- ing, supervision, sales and after sales service of the Voith Schneider Cyc- loidal propulsion system.

Suitable for a wide range of ves- sels—oil skimming tugs, shuttle fer- ries and oceanographic vessels to name a few—the Voith Schneider cycloidal system is known for many positive traits.

Named manufacturer of the year in 1992 by Hatteras Yacht for its work on N/C machined propellers,

Michigan Wheel utilizes fully-in- tegrated CAD/CAM to all ISO pro- peller tolerances. Aside from its line of thrusters and propellers, Michi- gan Wheel also offers the Towmaster

Rudder System and nozzles.

Sound Propeller features a product line complete with shafting, nozzles, bearings and shaft accesso- ries. Sound Propeller also uses com- puter technology to analyze and de- sign propellers for optimum effi- ciency.

The company offers its own stan- dard configurations, and can manu- facture its own or supplied custom designs to meet the needs of a spe- cific vessel.

The company also offers field re- pairs.

Maritime Reporter/Engineering News

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