4051 .ISO NTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ·MEKIYHAPOIHA OPIAHM3ALM IO CTAHIAPT3ALIWH.ORGANISATION INTERNATIONALE DE NORMALISATION Shipbuilding - Inland vessels - Steering gear - Values of torques Coinstruction navale -- Bateaux de navigation interieure -- Servomoteurs -- Valeurs des moments derotation First edition -- 1977-11-01 Ref. No. 1SO 4051-1977 (E) UDC 629.122.014.68 : 62-526 ISO4051-1977 Descriptors : shipbuilding, inland navigation, steering control devices, servomotors, torque. Price based on 1 page Copyright International Organization for Standardization Not for Resale ted without license from IHS FOREWORD Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (isO member bodies). The work of developing Internationat Standards is carried out through IsO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. International Standard ISO4051 was developed by Technical Committee ISO/TC 8, It has been approved by the member bodies of the following countries : Austria Hungary Poland Belgium India Romania Brazil Ireland United Kingdom Chile Italy U.S.S.R. Czechoslovakia Mexico Yugoslavia France Netherlands Germany Philippines No member body expressed disapproval of the document. @ International Organization for Standardization, 1977 : Printed in Switzerland itted without license from IHS Not for Resale ISO 4051-1977 (E) INTERNATIONAL STANDARD Shipbuilding -- Inland vessels - Steering gear Values of torques 1 SCOPE AND FIELD OF APPLICATION TABLE - Torque values This International Standard specifies the values of torques Nominal torque, MN-m for steering gears controlling one or more rudders (rotating propelling nozzles), used in vessels for inland waterways. 6,3 × 10 -3 10,0 × 10 -3 16,0 × 10 -3 2 DEFINITION 25,0 × 10 -3 For the purposes of this international Standard, the follow- 40,0 × 10 -3 ing definition applies : 63,0 × 10 -3 nominal torque : The greatest calculated working moment 100,0 × 10 -3* developed by the steering gear and characterizing its type size. For electro-hydraulic steering only. 3 TECHNICAL CHARACTERISTICS 3.2 Swing of the rudder 3.1 Torques Torques of steering gears shall have the values indicated in The greatest working angle of swing of the rudder equals 35° or 9o° to either side of the zero position. the table. Copyright International Organization for Standardization IHS under Not for Resale