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    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <link>https://trid.trb.org/</link>
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    <item>
      <title>MARINE OPERATION OF GAS TURBINE ENGINES AND WATERJET PUMPS FOR SMALL PASSENGER VESSELS</title>
      <link>https://trid.trb.org/View/161173</link>
      <description><![CDATA[This paper describes the planning, developmental, equipment selection and operational problem phases of the high-speed ferry system being operated on San Francisco Bay by the Golden Gate Bridge, Highway and Transportation District. The reasons for the selection of the vessel propulsion package consisting of gas turbine engines and waterjet pumps are discussed in some detail.  The paper covers the problems experienced to date with this equipment in continuous marine operations.]]></description>
      <pubDate>Mon, 19 Jan 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/161173</guid>
    </item>
    <item>
      <title>DEVELOPMENTAL EFFORTS ON A DIFFUSER AND PUMP INLET FOR A WATER JET PROPULSION SYSTEM</title>
      <link>https://trid.trb.org/View/143574</link>
      <description><![CDATA[Results from three studies relating to the development of a water jet propulsion system for a high speed planing craft are presented. More specifically, these studies apply to the development of the diffuser and pump inlet of the system and represent a continuation of previous work done at ARL/PSU in this area. The first study investigates the possible interaction of the flow between the diffuser and a vaned-volute type pump inlet. No interaction was revealed. The second study determined the feasibility of an improved vaned-volute type inlet using conventional pump design techniques to lay out the vanes. With the restrictions placed on the design by the propulsion system, flow separation from the vanes is likely and, thus, this type of inlet was found to be infeasible. The third study consisted of the design and model testing of a new diffuser and a conventional double suction pump inlet. The design and test results are documented in this report. Test results showed that the diffuser efficiency was improved slightly and the losses through the pump inlet were reduced by more than a factor of two from the losses in the vaned-volute inlet. (Author)]]></description>
      <pubDate>Mon, 29 Dec 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/143574</guid>
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      <title>EXPERIMENT ON REDUCTION OF PROPELLER EXCITED VIBRATORY FORCES AND MOMENTS OF A FISHING BOAT BY A WATERJET SYSTEM</title>
      <link>https://trid.trb.org/View/154474</link>
      <description><![CDATA[One method that has been suggested for the reduction of propeller-excited vibration is the addition of a water jet. The Authors here discuss the application of this method to a fishing boat, and describe tests on a trawler model in which a water jet was installed.  It is mentioned that most fishing vessels have pumping capacity that can be utilised in this way, and it may be possible to reduce the wake peak by fitting a water jet at the stern, directed towards the propeller.  In the model tested, that of an ocean-going stern trawler, four circular jets were fitted in this position, directed towards the top of the propeller disc, and a pump was fitted inside the model.  Results of these tests are presented in some detail.  The water jet had a favourable effect; there was reduction of over 20% in thrust variation, and this was supported by theoretical calculations, measured velocity distribution being used in both cases.  The estimated power required for such jets in the full-scale ship was about 82 hp, or about 3% of the main-engine output.  Order from BSRA as No. 52,650.]]></description>
      <pubDate>Wed, 27 Aug 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/154474</guid>
    </item>
    <item>
      <title>THE ROYAL NAVY'S NEW JETFOIL</title>
      <link>https://trid.trb.org/View/147503</link>
      <description><![CDATA[The vessel, named "Speedy" is a military variant of the "Boeing Jetfoil", and was developed for fishery protection in the North Sea.  The upper passenger deck was replaced by a clear space for stowing and handling two inflatable boats, and boarding is effected from double doors on the lower deck as in the passenger version.  The same waterjet propulsion system as for the "Jetfoil" is used, with waterjet pumps driven by two "Allison 501-K20A" gas turbines, each rated at 3,300 bhp.  The vessel will have a foilborne speed of 43 knots.  Fuel tank arrangement, propulsion system, automatic control system and cost figures are given.]]></description>
      <pubDate>Wed, 27 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/147503</guid>
    </item>
    <item>
      <title>WATERJET PROPULSION SYSTEM PERFORMANCE ANALYSIS</title>
      <link>https://trid.trb.org/View/87444</link>
      <description><![CDATA[This state-of-the-art report deals with the role of model and full-scale experiments in waterjet propulsion system analysis.  The basic theories for waterjet propulsion system performance are well known and provide a framework which allows system performance to be determined from the performance of system elements.  Almost all model testing is directed at the evaluation of the performance of particular system elements rather than at overall system test.  The typical elements which are considered include appendages, inlet, diffuser and ducting, pump and nozzle.  The experimental facilities for measuring inlet and appendage drag, inlet performance and diffuser performance at a number of U.S.  research establishments are described and some typical test results are presented and compared.  Order from BSRA as No. 49,610.]]></description>
      <pubDate>Tue, 31 Jul 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/87444</guid>
    </item>
    <item>
      <title>WATERJET PROPULSION FOR HIGH SPEED JETS</title>
      <link>https://trid.trb.org/View/17558</link>
      <description><![CDATA[Waterjet propulsion and its optimization for modern water crafts were considered and some comparisons were made between waterjets and propellers.  The waterjet optimization process presented includes considerations of inlet drag, weight of the propulsor, and the effect of the head and flow rate design parameters of the waterjet on the range of the craft.  The waterjet/propeller comparison showed that the waterjet is the preferred propulsor in applications of high and intermediate speed, applications requiring high maneuverability, and applications requiring shallow draft and immunity to water-borne debris.]]></description>
      <pubDate>Sun, 22 Oct 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/17558</guid>
    </item>
    <item>
      <title>WATERJET PROPULSION--AN OVERVIEW</title>
      <link>https://trid.trb.org/View/74378</link>
      <description><![CDATA[Waterjets have been used to propel marine vehicles in various forms for more than 300 years.  The Author identifies some of the critical areas in waterjet systems as being: (1) Waterjet inlet and ducting design, (2) On board water weight, and (3) Internal hydrodynamic form and friction losses.  He discusses the influence of these and other factors such as external-inlet drag and pump and inlet cavitation.  Several types of application of a water jet are described in detail such as for small sporting craft, hydrofoils, conventional hulls and surface effect ships.  In conclusion the Author states that waterjet propulsion of marine craft is now beginning to find wide-spread application, despite its inherently lower efficiency compared with the open marine propeller, since these devices offer advantages as regards safety, acceleration, shallow draught capability, and gear and drive-train reliability (especially at high powers).]]></description>
      <pubDate>Sat, 19 Aug 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/74378</guid>
    </item>
    <item>
      <title>FULL SCALE EVALUATION OF WATERJET PUMP IMPELLERS</title>
      <link>https://trid.trb.org/View/57859</link>
      <description><![CDATA[Full scale experiments were conducted with a U. S. Navy waterjet-powered planing boat to evaluate three different waterjet impeller/nozzle configurations. The configurations consisted of the standard impeller/nozzle combination currently installed on these craft in addition to a newly designed impeller evaluated with two different diameter nozzles. The overall program objective was to determine if marine propeller design techniques can be applied to the design of waterjet impellers and thereby (impeller) efficiency. Results show that the waterjet with a newly designed impeller approached but did not meet or exceed the overall performance of the waterjet equipped with the standard impeller and nozzle. The inlet velocity measurements showed extreme local velocity variations in flow approaching the impeller suggesting that any improvement in the impeller would have a marginal improvement on overall performance of the waterjet. It is concluded that marine propeller design techniques cannot be practically applied to the design of waterjet impellers in the majority of waterjets where extremely high thrust (disk loading) conflicts with the moderately-loaded propeller theory upon which the design procedures are based.]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57859</guid>
    </item>
    <item>
      <title>A WATER-TURBINE DRIVEN PROPELLER FOR HIGH PERFORMANCE SHIP PROPULSION</title>
      <link>https://trid.trb.org/View/67323</link>
      <description><![CDATA[The feasibility of a water-turbine driven propeller is investigated for high performance craft.  The proposed system uses a gas turbine driven pump installed in the craft.  The high pressure output from this pump is used to spin a ducted marine propeller by means of an impulse turbine attached to a ring around the propeller's tips. This system appears to be attractive for crafts operating at speeds up to 50 knots.  It also appears to offer an appreciable reduction in propulsive machinery weight as well as elimination of mechanical transmissions and reduction gears.  Propulsive efficiencies of the order of 43 to 46 percent are attainable.  A point design for a 120 ton, 40 knot hydrofoil is presented.]]></description>
      <pubDate>Wed, 13 Apr 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/67323</guid>
    </item>
    <item>
      <title>THE 'HYDROPULSER', A NEW IDEA FOR PROPULSION</title>
      <link>https://trid.trb.org/View/29625</link>
      <description><![CDATA[This report describes in detail the Hydropulser, a patented invention of Olivier de la Roche Kerandraon.  This device furnishes a new way to pump water or to propel ships.  The report contains schematics of the Hydropulser as well as a complete description of its development and performance.]]></description>
      <pubDate>Wed, 03 Dec 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/29625</guid>
    </item>
    <item>
      <title>HYDRODYNAMIC DESIGN PRINCIPLES OF PUMPS AND DUCTING FOR WATERJET PROPULSION</title>
      <link>https://trid.trb.org/View/14622</link>
      <description><![CDATA[The purpose of this report on the special form of hydrodynamic propulsion known as waterjet propulsion is to make the viewpoint of a pump designer known to the developers of waterjet devices.  More specifically, it is concerned with the contribution that the pump designer can make in order to give the designer of the entire propulsion plant the greatest possible freedom to find and use the most favorable overall arrangement.  There is no attempt to cover the entire field of waterjet propulsion. Moreover, only aspects of preliminary design are considered because it is in this stage of development that irreparable mistakes can be made.  The report assumes that the reader is familiar with the general characteristics of hydrofoil and captured air-cushion craft to which this type of propulsion mainly applies.  Following an outline of the principal problems involved in the propulsion of high-speed surface craft, the design principles of hydrodynamic (centrifugal and axial flow) pumps are described and later applied to the design of waterjet propulsion pumps.  The intake and duct problem is then described and designs are illustrated for a few typical overall arrangements.  The report concludes with an example of propulsion pump and duct design for a particular set of specifications.  This example can serve as the foundation for additional preliminary design studies.]]></description>
      <pubDate>Fri, 26 Apr 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/14622</guid>
    </item>
    <item>
      <title>1970 ANNUAL TECHNICAL SYMPOSIUM ( 7TH ). WATERJET PUMP PERFORMANCE DETERMINATIONS</title>
      <link>https://trid.trb.org/View/544</link>
      <description><![CDATA[The described calculation procedure originated from the necessity of determining waterjet pump performance requirements for waterjet propelled ( sea ) vessels.  The waterjet pump sizing procedure is basically in two parts. The purpose of the first part is to determine the requirements of flow rate and head required on any pump to produce the necessary thrust to achieve design speed. Secondly, where the pump requirements are known, studies to determine pump rpm, cavitation limitation, impeller diameter, case volume and wet weight can be made to estimate some detailed aspects of various pump types which might be applied.  A computer program was developed from this procedure which streamlines studying variations in design. The procedures and the computer program can also be used in evaluating waterjet systems presented in studies and proposals.  ( Author )]]></description>
      <pubDate>Sun, 30 Dec 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/544</guid>
    </item>
    <item>
      <title>GAS TURBINES DRIVE NEW CONCEPT MARINE CRAFT</title>
      <link>https://trid.trb.org/View/2629</link>
      <description><![CDATA[A new concept of marine vessel drive solution in rough water is presented.  The design is based on the hydro-ski principle powered with gas turbines for high speed and coupled with waterjet pumps installed in each planing ski. Results of tests conducted on Aquarius vessel are discussed.  Comparative analysis is made regarding economics with other marine transportation vessels.]]></description>
      <pubDate>Thu, 08 Nov 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/2629</guid>
    </item>
    <item>
      <title>DESIGN OPTIMIZATION OF WATERJET PROPULSION SYSTEMS FOR HYDROFOILS</title>
      <link>https://trid.trb.org/View/10959</link>
      <description><![CDATA[A generalized waterjet propulsion system in a subcavitating hydrofoil craft is considered for design and performance estimation.  Independent system parameters of jet velocity ratio, inlet velocity ratio, and nacelle inlet diameter to maximum diameter ratio are varied to search for the optimum system.  The optimum system is defined as the minimum total propulsion system weight.  The optimization scheme utilizes a directed search without the calculation of derivatives, and was chosen for its simplicity, versatility and rapidity.  The ducting system is divided into components for head loss calculations.  For a given design, total head losses in the duct are computed by means of experimental data and empirical equations, enabling pump, reduction gear, and prime mover design to be completed.  Results for a sample craft are included which indicate that hydrofoils should be designed about the gas turbine, due to the discrete power levels that are available.  Suboptimizing the nacelle design may lead to an overall less optimum system design.  A general lack of information was noted on nacelle, cascade corner, and three dimensional diffuser design and performance prediction.  A FORTRAN computer listing and flow charts are included.]]></description>
      <pubDate>Fri, 11 May 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/10959</guid>
    </item>
    <item>
      <title>DESIGN OPTIMIZATION OF WATERJET PROPULSION SYSTEMS FOR HYDROFOILS</title>
      <link>https://trid.trb.org/View/10960</link>
      <description><![CDATA[The theoretical model of a waterjet system for the propulsion of hydrofoils is described.  The theoretical model has been programmed for the computer and used to calculate the minimum weight propulsion systems for hydrofoils.  Some of results of the optimization procedure are presented together with basic curves which summarize the performance of waterjet propulsion systems for hydrofoils.]]></description>
      <pubDate>Fri, 11 May 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/10960</guid>
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