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    <title>Transport Research International Documentation (TRID)</title>
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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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    <item>
      <title>BEARING STABILITY -- DATA FOR DESIGN</title>
      <link>https://trid.trb.org/View/146989</link>
      <description><![CDATA[The theory of bearing stability is described in its most general form without restricting it to any bearing geometry or lubricant.  This theory has then been used to guide the design of an apparatus in which the bearing system is flexibly mounted.  The initial experiments have been carried out with a self acting air bearing, a system for which there is reliable theoretical data on bearing stability.  There is close agreement between the design data obtained by this new experiment technique and the theoretical results obtained from numerical solutions of Reynolds equation.  The use of this design data has been demonstrated by predicting the effect of load on the whirl onset speed.]]></description>
      <pubDate>Wed, 30 Jan 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146989</guid>
    </item>
    <item>
      <title>PHOTOGRAMMETRY AND PINTLE BEARINGS</title>
      <link>https://trid.trb.org/View/146901</link>
      <description><![CDATA[One of the many problems which came to light during the Polar Star's drydocking following Deepfreeze 78 was that of excessive rudder pintle bearing wear.  Over three quarters of an inch to be exact.  In the course of answering the question "WHY?", the process known as photogrammetry was employed.  This is the first known application of this process in the ship repair field.  A very enlightening article on a technological advance and process that may well have many uses in the ship repair field of the future.  As a result of the processes employed misalignment was discovered and corrected.]]></description>
      <pubDate>Tue, 15 Jan 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146901</guid>
    </item>
    <item>
      <title>THE NEW HDW-SIMPLEX-HL THRUST BEARING</title>
      <link>https://trid.trb.org/View/74368</link>
      <description><![CDATA[The Howaldtswerke-Deutsche Werft Simplex-HL tilting-pad thrust-bearing, patented in Germany and other countries, is now fitted in a number of ships, mostly large tankers, and has proved itself under severe conditions in trials and in service.  The bearing is also suitable for thrust applications in other types of high-power machinery.  The Author of HDW, describes the construction and operation of this bearing in some detail, with particular reference to the improved type of tilting pad that has been developed, the method of assembly and dismantling of the bearing, and the lubrication system (which can be a part of the main-engine or other sytem, or can be integral with the bearing assembly).  Order from: BSRA as No. 48,401.]]></description>
      <pubDate>Sat, 19 Aug 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/74368</guid>
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    <item>
      <title>THE EFFECT OF LARGE C.P. PROPELLERS ON STERN TUBE BEARING WEAR</title>
      <link>https://trid.trb.org/View/6443</link>
      <description><![CDATA[The article shows the value of controllable pitch (C.P.) propellers, and mentions recent bearing designs.  Ships with fixed pitch propellers have had excessive bearing wear more often than those with C.P. propellers.  Stopping and reversing a shaft breaks up the oil film, resulting in a greater load on the stern tube bearing.  A C.P. shaft always rotates in the same direction, eliminating risk of dry friction.  In one recent test 25 to 30 rev/min was needed to insure a good film.  With a C.P. propeller the vessel's speed could be cut down to zero.  Less shaft starts are made with the C.P. propeller.  Recent bearing designs include a horizontally split stern tube bearing, an assembly that can be moved forward in a single unit, and the spherical roller bearing, which has given good results on small ships.  Advantages of these types of bearings are listed and explained.]]></description>
      <pubDate>Sun, 10 Nov 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/6443</guid>
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    <item>
      <title>AN IMPROVED STERN BEARING SYSTEM--DESIGN FEATURES OF AND OPERATIING EXPERIENCE WITH TURNBULL SPLIT STERN BEARINGS</title>
      <link>https://trid.trb.org/View/12121</link>
      <description><![CDATA[Stern bearings have been a neglected area of marine engineering design, having remained virtually unchanged since their introduction.  The dramatic increase in ship size and power in recent years, together with the need to increase the availability of the vessel in service, has led to the production of new designs of stern bearings to overcome the inherent disadvantages of stern tubes.  The split stern bearings described in this paper can be installed more easily and in a much shorter time than that required for a stern tube.  These bearings enable tailshaft surveys to be carried out with considerable savings in both time and labor since the tailshaft with propeller are not removed.  The design allows the bearing and the condition of the tailshaft, bearing, and oil seals to be checked while the vessel is afloat.]]></description>
      <pubDate>Fri, 06 Apr 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/12121</guid>
    </item>
    <item>
      <title>IMPROVING THE PROPERTIES OF WOOD LAMINATES FOR BEARINGS OF SHIP MECHANISMS</title>
      <link>https://trid.trb.org/View/8057</link>
      <description><![CDATA[The compression bonding of wood veneers and layers of cotton fabric with SBS-1 resin gave laminated components for use as submerged bearings in ship construction.  The filling of SBS-1 with 10% graphite or 5% MOS2 decreased the friction coefficient of the components. These components have lighter impact strength and lower swelling in water than other wood resin laminates.(Author)]]></description>
      <pubDate>Fri, 02 Mar 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/8057</guid>
    </item>
    <item>
      <title>INSTRUMENTATION OF BEARING SYSTEMS</title>
      <link>https://trid.trb.org/View/189</link>
      <description><![CDATA[In development work and problem solving, it is frequently necessary to instrument bearing systems of installed machines operating in field; suggestions to follow and pitfalls to avoid in making various bearing system measurements, such as pressure, temperature, film thickness, flow, and load; also discussed are bearing assembly and operation of recording equipment under adverse conditions; tests conducted on board ship are given as examples.]]></description>
      <pubDate>Mon, 30 Oct 1972 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/189</guid>
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    <item>
      <title>SOME INVESTIGATIONS OF ANTIFRICTION PROPERTIES OF NONMETALIC MATERIALS PAIRED WITH BRONZE USING WATER LUBRICATION</title>
      <link>https://trid.trb.org/View/799</link>
      <description><![CDATA[Antifriction properties of nonmetallic materials have been studied on bearings made of caprone, textolite, oak, birch, white beech, lignum vitae, and other materials paired with bronze. The tests were made at rates of 2.2, 3, and 4.1 m/sec under pressures of 0.25, 0.5, 1, 2, and 4 mn/sq. m. Water was used as the lubricant. The test results are given. (Author)]]></description>
      <pubDate>Thu, 13 May 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/799</guid>
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