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Topic: Towing tank

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In the News (Thu 21 Jun 18)

  Ship model basin - Wikipedia, the free encyclopedia
A towing tank: This is a basin, several metres wide and hundreds of metres long, equipped with a towing carriage that runs on two rails on either side.
Additionally, a towing tank can be equipped with a PMM (planar motion mechanism) or a CPMC (computerized planar motion carriage) to measure the hydrodynamic forces and moments on ships or submerged objects under the influence of oblique inflow and enforced motions.
The towing tank can also be equipped with a wave generator to carry out seakeeping tests, either by simulating natural (irregular) waves or by exposing the model to a wave packet that yields the RAOs for all frequencies in one single test.
en.wikipedia.org /wiki/Ship_model_basin   (698 words)

 SEA — — Academics — K-12
Clear Towing Tank, 3-4 m x.4 m x.4 m (a towing tank may be constructed by the class or in the school’s woodworking shop.
Tow each boat a given distance in the tank using weights descending from the smart pulley.
The towing tank should be filled with water to just below the hole where the string goes through the left end of the tank.
www.sea.edu /academics/k12.asp?plan=fluidfriction   (805 words)

 Ata Nutku Ship Model Testing Laboratory
There is also a smaller towing tank with the dimensions of 40 m x 2 m x 1 m, a circulating water channel, a cavitation tunnel, and a stability tank.
The large towing tank is equipped with a numerically controlled carriage, resistance, propulsion and open-water propeller dynamometers and a wavemaker.
While the large tank is exclusively used for the shipbuilding industry projects and research purposes, the small tank is utilized for the academic studies and students training in the faculty.
nutkulab.itu.edu.tr /lab.htm   (628 words)

 Nat' Academies Press, Twenty-Second Symposium on Naval Hydrodynamics (1999)
Objects are towed along the tracks by two stainless steel wire ropes which enter the water at one end of the tank and leave from the other end.
This foil spans the width of the tank with a small clearance of 1.4 cm between the edges of the foil and the walls of the tank.
However, during runs made with the Pitot tubes moving through the undisturbed water in the towing tank, a pressure fluctuation corresponding to a root-mean-square velocity fluctuation of 0.2 cm/s was observed.
www.nap.edu /books/0309065372/html/818.html   (10199 words)

 USGS, OSW at SSC - Hydraulic Laboratory (Tow Tank Facility)   (Site not responding. Last check: 2007-10-17)
Examples of meters calibrated in the towing tank are: mechanical rotating cup meters, both vertical and horizontal axis type meters; electromagnetic meters, one- and two-dimensional; acoustic time of travel meters; three-dimensional acoustic Doppler meters; and three-dimensional acoustic Doppler current profiling meters.
The towing tank has a 12 x 12 ft cross section and is 450 ft long.
The tow vehicle is capable of speeds from 0 to 15 ft/s (feet per second), and has a platform size of 12 x 14 ft. The carriage is equipped with a data acquisition system designed to accept distance traveled, elapsed time, and meter pulse count information.
water.usgs.gov /osw/hlf/towtank.html   (147 words)

 Wolfson Unit MTIA - Yacht Testing
Extensive tank testing for these projects was carried out at both 1:9 and1:4 scale, the smaller models proving to be a valid and cost effective method of evaluating design concepts prior to refinement at the larger scale.
Towing Tank tests using small scale models, up to 2.5m long: using the Southampton Institute tank, which is 60m long x 3.7m wide x 1.8m deep and is equipped with Wolfson Unit designed dynamometer to measure resistance, sideforce, roll and yaw moments.
Towing Tank tests with large scale models, up to 6m long: using larger facilities, such as the Defence Research Agency tank at Gosport, which is 258m long x 12.2m wide x 5.5m deep, again using a Wolfson Unit designed towing system and dynamometer.
www.wumtia.soton.ac.uk /yachttesting.html   (1363 words)

 Towing Tank   (Site not responding. Last check: 2007-10-17)
A towing tank is an experimental facility widely used in the design and testing of ships and offshore structures.
Towing tanks are also suited to the study of low-Reynolds-number (low-velocity) flows and stratified flows.
The X-Y Towing Tank at the University of Saskatchewan is located in the Experimental Fluid Mechanics Laboratory (ENG 1B87), which is part of the Department of Mechanical Engineering.
www.engr.usask.ca /~drs694/towtank.htm   (293 words)

 Garvey Schubert Barer | Resource Center
It is also significant that tugs towing tank barges in coastal waters beyond the U.S. boundary line are subject to the standards prescribed by the International Convention on Standards for Training, Certification and Watchkeeping for Seafarers (STCW Convention).
Because the federal requirements respecting the phase-out of single-hull tank vessels appear in OPA 90 (Section 4115 of Title IV), under the Ninth Circuit's reasoning, the saving clause in Title I of OPA 90 (Section 1018) could be construed to validate stricter state laws on that same subject.
An examination of several selected Washington regulations applicable specifically to tank barges and the tugs that tow them reveals the extent of the state's ambition and the overlap between the state scheme and the federal regime.
www.gsblaw.com /resource/pub_result.asp?ID=172757242000   (6386 words)

 IIHR's Towing Tank, IIHR, College of Engineering, The University of Iowa
The towing tank is a 100-m long, 3-m wide, 3-m deep water-filled channel that is orientated lengthwise (north-south) in the main building.
The tank is equipped with a plunger-type, wedge-faced wavemaker at the north end of the tank and a series of semi-submerged fibergrate panels (south-end beach) at the south end of the tank for wave absorption.
The IIHR towing tank is in the early stages of planning for and procuring an advanced 6D motion tracking instrument for future six-degrees-of-freedom (6DOF) experiments with model 5512.
www.iihr.uiowa.edu /facilities/towtank   (566 words)

 Tow Tank3
The tank is suitable for conducting experiments to measure drag and resistance on towed ship models and static marine structures.
Drag, resistance and motion measurements on towed bodies are made though the dynamometer and associated sensors attaching the model to the towing carriage.
Various dynamometers are available, the standard device allows the attached model to be positioned parallel with the towing axis or to be arranged with fixed angles of heel or angles of attack.
www.marine.gov.uk /tow_tank3.htm   (455 words)

 MARIN - Depressurised Towing Tank   (Site not responding. Last check: 2007-10-17)
The Depressurised Towing Tank is a unique research facility for testing cavitation of the propeller(s) operating behind the complete ship model.
Tank dimensions are 240 x 18 x 8 m.
According to the laws of similarity which apply to cavitation, the ambient air pressure in the tank must be reduced to the inverse of model scale.
www.marin.nl /Faciliteiten/Depressurised_Towing_Tank.html   (408 words)

 Federal Register Vol. 63, No. 250, December 30, 1998, Interim Final Rule (USCG1998-4443)   (Site not responding. Last check: 2007-10-17)
Tank barge and towing industry firms, along with a few state and local governments, will incur costs primarily to purchase, install, and maintain powered emergency anchoring systems and owner/operators' choices among emergency retrieval systems on certain tank barges and in some instances, towing vessels.
Whereas we adjusted benefit calculations to reflect OPA 90- scheduled phase-out of actual tank barge capacity to approximate declining exposure and spill volume potential, we adjusted cost calculations to accommodate the phase-out of hulls rather than volume, as the purchase, installation, and maintenance of equipment required by this rule is quantified on a per-hull basis.
The costs are fairly low in comparison with the replacement cost of a tank barge, very low in comparison with the replacement cost of a towing vessel, and extremely low in comparison with the damage that could be caused by, and the liability that could result from, an accident and resultant spill.
www.uscg.mil /d14/units/msohono/emgtankbarge1.htm   (9897 words)

 Business Initiative Unit
With its Yacht and Ship Towing Tank, Southampton Institute is equipped with one of the finest facilities in the UK for the evaluation and development of model-scale hulls and associated hydrodynamic components, such as keels, rudders and fins.
The Towing Tank has also been used to test a variety of different inventions, including wave energy devices, depth sounders, semi-submersibles and underwater tools.
The Towing Tank is 60m in length, 3.7m wide and 1.8m deep.
www.solent.ac.uk /biu?level1id=11709&level2id=11713   (313 words)

 Krylov Shipbuilding Research Institute. Facilities. Hydro- & Aerodynamics.Deep-Water Towing Tank
This facility is intended for towing and self-propelled tests of surface ship and submerged models in deep waters and near the surface, as well as for testing propellers and propulsion units under open-water conditions.
Each part of the Tank is equipped with two towing carriages permitting to test ship models of up to 10m in length at speeds of up to 20m/s.
The Tank equipment allows measuring forces on ship hull and propulsor models, studying characteristics of non-uniform unsteady 3D flow in propulsor vicinities, simulating full-scale conditions of the flow around the hull with the help of polymer injections, conducting self-propelled model tests, testing models with artificial air cavities of their bottoms.
www.ksri.ru /eng1/exp/hydro/deep.htm   (112 words)

 EPA: Federal Register: Regulated Navigation Area: Navigable Waters Within the First Coast Guard District
The proposed rule would require that all transits involving towing vessels not equipped with twin-screw and twin-engine propulsion, and that are engaged in towing petroleum-laden tank barges in the navigable waters of the First Coast Guard District, employ an escort or assist tug.
It is primarily the businesses that hire the towing vessels and tank barges for transporting their goods who directly incurs the costs of this rulemaking by having to pay for the escort or assist tug.
However, some towing vessel companies, the majority of which are small entities, may be indirectly affected by the proposed rule if they can no longer provide tug service at a competitive price due to the requirement that they employ an escort or assist tug.
www.epa.gov /fedrgstr/EPA-GENERAL/1998/October/Day-13/g27361.htm   (6030 words)

 German World War II Prime Movers and Halftracks
Towing capacity refers to the pulling power of the vehicle, not the actual weight of the towed load.
The standard version was mainly used to tow light artillery weapons such as the 37 mm and the 105 mm along with ammunition.
Designed as a towing trailer for various engineer trailers (SdKfz 6) and artillery pieces (SdKfz 6/1) a later version (SdKfz 6/2) was developed as a mount for the 37mm Flak 36 AA piece with ammunition towed in a trailer.
www.geocities.com /Athens/Acropolis/8141/halftracks.html   (2049 words)

 Dantec news, worlds first towing tank PIV system   (Site not responding. Last check: 2007-10-17)
The IIHR towing tank is 100 m long (by 3 m wide and 3 m deep) and the maximum towing speed is 3 m/s.
The towing tank PIV system can be configured to measure in all three planes of interest: vertical and horizontal planes parallel to the towing direction (XZ and YZ planes), and vertical plane perpendicular to the towing direction (XY plane).
Between tows, the water must settle for 15 minutes, so a total of 1,000 vector maps can be acquired and processed in one hour.The FlowMap PIV data is averaged to find mean velocity distributions and turbulence statistics.
www.dantecmt.com /News/Archive/010897.htm   (729 words)

 Fluid Modeling Facility
The towing tank is primarily used for simulation of strongly stable flow; salt water of variable concentration is used to establish density gradients in the tank, which simulates the nighttime temperature gradient in the atmosphere.
A convection tank measuring 1.2 m on each side and containing water to a depth of 0.4 m is used to study the convective boundary layer (CBL), and flow and dispersion under convective conditions.
The tank is temperature stratified using an electrical heating grid, then convection is initiated by heating the floor of the tank.
www.epa.gov /amdweb95/Resources/fmf.html   (382 words)

 AmericaOne Challenge - Tank-Testing Program Gets Underway
he towing tank tests determine the total hydrodynamic resistance of the hulls as they are driven down the tank attached to a towing carriage.
In addition, the characteristics of the waves created as the one-third-scale models are towed the length of the tank are analyzed to determine the component of resistance associated with the wave-making characteristics of each hull.
Following the tests, the towing tank data are extrapolated to full-scale hydrodynamic performance data.
www.americaone.org /news/a1-news/tanktest.html   (523 words)

 Woodalls Open Roads Forum: Fifth-Wheels: Fuel tank options
With the tank sitting at the front of the bed transfers enough weight forward so I did not notice any big difference in handling with the extra weight.
I am going to Canada and I called the apprpriate agency and I can carry the transfer tank which they call a tidy tank, but I will remove the 12v pump I have and use an electric small fuel pump at the drain hole this way I won't be so conspicuous.
All i do is hit the switch on the dash to change tanks and the OEM gage reads off the tank i am pulling from.
www.woodalls.com /forums/Index.cfm/fuseaction/thread/tid/13755028.cfm   (759 words)

 Towing Tank - Marine Science and Technology - University of Newcastle   (Site not responding. Last check: 2007-10-17)
Since its construction in 1951 the Towing Tank at Newcastle has been in almost continuous use.
The basic structure which is 40m long x 3.75m wide and 1.2m deep, as well as the mono-rail carriage system are almost unaltered.
A wide range of mechanical, electronic and model making workshops are available to provide support and back-up for the Towing Tank.
www.ncl.ac.uk /marine/about/facilities/tank.htm   (180 words)

 Iowa Institute of Hydraulic Research Towing Tank Web   (Site not responding. Last check: 2007-10-17)
In addition, there are subwebs devoted to presentation of the towing tank facility, collaborations with other researchers and laboratories, publications that are directly related to the IIHR towing tank work, links to related sites and a photo gallery.
The towing tank recently benefited from the addition of an all-new model trailer which serves as an instrumentation platform and hook-up point for models.
The IIHR towing tank group is currently working to secure funding for a roll damping project for DTMB model 5512.
www.iihr.uiowa.edu /~towtank   (311 words)

 Public Law 490
If the towing vessel is not so equipped the tow shall be accompanied by an escort towing vessel of sufficient capacity to assume the tow from the primary towing vessel if it loses the tow, power or steering.
If the towing vessel is so equipped then an escort vessel of sufficient capacity to assume the tow shall be called immediately to escort the tank vessel if one system is incapacitated or the towing hawser is broken while it is in state waters.
For the purposes of this section manned barges shall be considered to be tank barges either manned with a Person in Charge (PIC documented tankerman) on board or if the barge is towed alongside or pushed ahead with a PIC assigned to the tank barge, with no other duties, on the towing vessel.
www.rilin.state.ri.us /PublicLaws/law00/law00490.htm   (2013 words)

 BNO BBS - BNO's Bulletin Board System: Anyone have the auto trans. towing fluid tank setup?
It is a tank and valve you install in the tube between the trans and the cooler.
Works by overfilling the trans while towing which floods the clutches and bearings that need lubrication.
Best bet is to get a tow that the manufacturer says can be towed 4 down with no mods.
www.busnut.com /bbs/messages/233/588.html   (297 words)

 KSC Release No. 148-97   (Site not responding. Last check: 2007-10-17)
While the first tow operation is still some time off - around the April/May 1998 time frame - the hardware needed to do the job is already on deck at NASA's Hangar AF on Cape Canaveral Air Station, home port for the two ships.
In the past, the task of towing the external tank by barge to KSC was carried out under a subcontract overseen by Marshall Space Flight Center, Huntsville, AL.
Chaput and Freedom Star Capt. Dave Fraine are accompanying the current ET towing contractor on trips from the Michoud plant located on the Mississippi River Gulf Outlet, a 65-mile-long channel, becoming familiar with the route and the towing operation.
www-pao.ksc.nasa.gov /kscpao/release/1997/148-97.htm   (471 words)

 SVA | Facilities | Towing tank
The towing tank is used for conventional routine tests like resistance and propulsion tests, measurements of wake field and boundary layer, paint flow tests as well as open water tests.
Besides these routine tests, the SVA carries out a lot of additional investigations like optimisation of hull form, determination of manoeuvring and seakeeping characteristics including slamming damage, measurements of forces and moments on a single blade of propellers as well as arrangements of energy saving devices, tunnels and nozzles.
Towing tests with fishing gears, life-saving appliances and sport boats as well as underwater models are also a component of the offer of SVA.
www.sva-potsdam.de /facilities/tank/main.shtm   (201 words)

The high speed towing tank is a straight tank 313 feet long and 12 feet wide and can support water depths as high as 6 feet.
It is one of the highest speed towing tanks in the world with a monorail supported, cable driven carriage capable of speeds from 0 to 100 feet per second with speed control of.01 feet per second.
The high speed tank can produce a wide variety of wave types through an articulated double-flap programmable wave maker.
www.stevens-tech.edu /engineering/cms/Facilities   (650 words)

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