New Towboat Design At St. Louis Ship Results From Two-Year Research Program
The Super Hydrodyne, an improved towboat design that resulted from an extensive $500,000 research and development program, was unveiled recently by St. Louis Ship, a division of Pott Industries Inc., St. Louis, Mo.
The Super Hydrodyne, claimed to be more energy efficient and maneuverable than existing models, is already in service on inland waterways, following two years of development.
The design changes incorporated in the Super Hydrodyne have a performance improvement of 4.9 percent, the company reports, yielding a return on investment of 47 percent compared to the original design of the equipment.
Three 6,000-hp towboats are currently in service. The first two, M/V Paulina, and M/V Altonian (shown above), were delivered to the Peavey Company, and the third, the M/V Beth Armstrong, went to H & S Transportation Co., Inc. Several new Super Hydrodyne towboats make up St.
Louis Ship's backlog, ranging in horsepower from 4,500 to 9,000 and consisting of twin- and triplescrew designs.
The original Hydrodyne hull design was introduced in 1959, following an extensive model test program conducted at the Maritime Research Institute in the Netherlands (MARIN), formerly known as the Netherland Ship Model Basin.
Hydrodyne was the name selected to describe the hull shape optimized for push towing service on Western rivers. The design included appendages specifically designed to perform in the restricted channel environment utilizing high horsepower installations.
In most design applications, the hulls were fitted with Kort nozzles integrated into the tunnel stern. The Hydrodyne is designed to operate as an open propeller design as well. During the next two decades, additional model tests were completed at MARIN, resulting in continued refinements to the Hydrodyne.
Seventy-two Hydrodynes have been delivered and are still operating.
In the early fall of 1979, meetings were held at St. Louis Ship on whether the Hydrodyne could be further improved by incorporating a more efficient design.
Several weeks were spent planning and preparing a test program.
During February 1980, St.
Louis Ship representatives visited MARIN and established a model test program designed to investigate the optimum propeller diameter.
nozzle length, and nozzle profile. Strut design, steering rudder, and flanking rudder designs with the latest Hydrodyne concepts were used.
A nominal 3,000-hp per shaft was selected as the basic design requirement and models of twinscrew towboats were manufac- Qn a one-of-a-kind boat.
The Portland. Tlx only u'orking steam-powered stemwlxel tugboat in the u'orld After years of faithful sen'ice in Portland Harbor, we're retiring this historic i 'esse/ from her commercial duties Marking the end of an era. Marking a new beginning.
The Port of Portland has begun a search for companies that would be interested in comerting and operating this classic ship as a tour boat in tlx Portland Harbor on a lease basis.
For more infonnation, contact David N. Neset, Director, Marine Sen ices. (503) 231-5000 It's a rare opportunity.
Don't miss The Boat.
$ Port of Portland P.O. Box3529, Portland, Oregon 97208 tured for the tests. Beginning in April, overload tests were conducted behind a barge fleet representing 25 loaded jumbo barges and an eight-barge integrated unit tow in MARIN's shallow water basin.
Test data was collected for performance comparisons ahead, astern, steering, and flanking in different water depths with two different towboat lengths operating behind the two barge fleets.
Using the optimum propulsion system, the steering rudder and flanking rudder designs were further tested and refined for maximum operating efficiency.
After two and one-half months of testing for design optimization in the shallow water basin, another test program was prepared for the large cavitation tunnel at MARIN to test the optimum towboat model and appendage combination obtained from the shallow water basin tests. These tests were to insure a propeller design as free of cavitation as possible.
The tests resulted in changes to the strut design.
The following weeks were spent reviewing test results and comparing manufacturing costs versus performance gains. St. Louis officials contacted many barge line operating managers for their opinions of the relative importance of the various operating conditions that had been tested. Utilizing the operator requirements and information from model tests, the design was selected to give the optimum in push, steering, and flanking, and which also yields the best return on investment for the operator.
Other stories from September 15, 1981 issue
- Two Vessels Trucked To 'Sea' page: 5
- Navy Buys Six SL-7 Sea-Land Containerships In $207.5-Million Contract page: 7
- $5-Million Contract To Burrard Yarrows For Vessel Lengthening page: 8
- NASSCO Delivers First Of Three New Carlsbad Class Product Carriers To Union Oil page: 8
- Bartell Named GM Of Texaco's International Marine Sales Department page: 9
- Amsterdam Drydock To Rebuild Ro/Ro Passenger Vessel For Irish Line page: 9
- Dravo SteelShip Delivers The 'Bud Weber' page: 10
- NASSCO Lays Keel Of 44,000-Dwt Product Carrier For American Trading page: 10
- OCEANS 81 page: 12
- Gibbs & Cox Names Ford Chief Engineer page: 16
- Literature Available On Devflex 1, Fire Retardant Finish From Devoe Marine page: 16
- John Chandler Named York Vice President page: 18
- Announce Personnel Changes In Marine Branch At Phillips page: 18
- Griffin-Alexander III Commissioned At Beth Baltimore page: 20
- Skully Bros. Delivers Omaha Arrow, Second Of Six Supply Vessels page: 24
- Iowa Marine Delivers M/V Tony H page: 24
- Curtis S. Townshend Appointed Vice President Of Mobil Marine Sales page: 25
- Lease MARISAT Satellites For Use In Three Oceans page: 25
- 55th Annual PROPELLER CLUB CONVENTION page: 26
- Bayou Black Shipyard, Inc. Delivers 'Delta Christie' page: 34
- HBC Barge Installs New Launchways-First Phase In $4-Million Expansion page: 34
- Name O'Leary Marine Development Manager At Dillingham Ocean page: 36
- Tracor Marine Announces Production Appointments At Port Everglades Yard page: 38
- Literature Available From Gems Sensors On New Flow Transducer page: 38
- Vancouver Shipyards Launches Log Barge On A Film Of Water page: 41
- N e w V e r s i o n O f N a t i o n a l S u p p l y J a c k i n g System — L i t e r a t u r e A v a i l a b le page: 50
- Anschuetz Hosts Exhibit For Major Manufacturers Of Marine Equipment page: 52
- 'Petromar Bravo# Delivered By Halter —Third Of Six Ordered page: 52
- Launch Two Stern Trawlers At Halifax page: 54
- IHI To Employ New Hull Form On 223,000-Dwt Bulk Carrier page: 55
- Levingston, CNC Sign Agreement To Build Jackups At La Ciotat page: 56
- Seaward International Opens New York Office page: 56
- W h e e l e r Associates Names W a r y a s A Vice President page: 58
- 'Gulf Shark' Delivered To Gulf Fleet Marine page: 59
- Three Oceangoing Great Lakes Bulkers To Be Built In U.K. page: 59
- New Towboat Design At St. Louis Ship Results From Two-Year Research Program page: 60
- Alfa-Laval Publishes Corporate Brochure page: 60
- Sperry Introduces New Doppler Navigation Sonar —Literature Available page: 61
- National Marine Service Names Five To New Posts page: 61
- Krupp Christens Bridge Simulator For Use In Hamburg Polytechnic page: 62
- Marathon's Vicksburg Yard Refines 'Walking' Process For Jackups page: 63
- $30-Million, Eight Vessel Contract Signed By Halter And Tidewater Marine page: 64
- I n g r am Tankships Orders Five Product Carriers —Names B a l d w i n VP page: 65
- N e w Brochure Describes Regency's Polaris Line Of M a r i n e Electronics page: 65
- $270-Million Expansion Is Proposed For Port Of Portland page: 66
- Epsco Marine Introduces New 32-Mile Radar U n i t - Literature Available page: 68
- Levingston Forms Purchasing Company —Names Officers page: 68
- N e w B u r r a r d Y a r r o w s F l o a t i ng Dock For Ships To 7 5 , 0 0 0 DWT page: 76
- Top Officers Elected At Guralnick Associates page: 77
- U.S. Steel Announces Four Promotions In Great Lakes Operations page: 77
- Three Drum Seiners Delivered By RivTow Straits Limited page: 77
- FAST ON THEIR FOILS page: 77
- MTB U.S. Agent For Arsenate Triestino San Marco Shipyard page: 82
- NABRICO's New Winch To Be Installed At Cummins Terminal page: 82
- Racal-Decca Marine Promotes Executives, Opens New Offices page: 83