EN 28848:1993
(Main)Small craft - Remote steering systems (ISO 8848:1990)
Small craft - Remote steering systems (ISO 8848:1990)
Lays down requirements and test methods for remote push-pull cable steering systems and their major component items, used for small craft with single and twin installations of outboard motors of over 15 kW power, and all inboard motors, inboard motor-outdrives, and waterjet drives.
Kleine Wasserfahrzeuge - Steueranlagen (ISO 8848:1990)
Navires de plaisance - Appareils à gouverner commandés à distance (ISO 8848:1990)
La présente Norme internationale spécifie les caractéristiques exigées et prescrit les méthodes d'essai des appareils à gouverner commandés à distance, à transmission par câbles va-et-vient («push-pull») et de leurs principaux éléments constitutifs, installés sur des navires de plaisance à moteurs hors-bord unique ou jumelé dont la puissance excède 15 kW et tous les moteurs intérieurs, intérieurs à transmission extérieure et à propulsion par hydroréacteurs.
Mala plovila - Daljinski sistemi krmiljenja (ISO 8848:1990)
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mala plovila - Daljinski sistemi krmiljenja (ISO 8848:1990)Kleine Wasserfahrzeuge - Steueranlagen (ISO 8848:1990)Navires de plaisance - Appareils a gouverner commandés a distance (ISO 8848:1990)Small craft - Remote steering systems (ISO 8848:1990)47.080ýROQLSmall craft47.020.70Navigacijska in krmilna opremaNavigation and control equipmentICS:Ta slovenski standard je istoveten z:EN 28848:1993SIST EN 28848:2000en01-april-2000SIST EN 28848:2000SLOVENSKI
STANDARD
INTERNATIONAL STANDARD IS0 8848 First edition 1990-12-15 --- Small craft - Remote steering systems Navires de plaisance - Appareils ZI gouverner command& a distance Reference number IS0 8848: 1990(E) SIST EN 28848:2000
IS0 8848:1990(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the international Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an lnter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 8848 was prepared by Technical Committee ISO/TC 188, Small craft. NOTE 1 This International Standard specifies requirements and test methods for remote steering systems as cited in clause 1. More specialized requirements for such steering systems to be applied to simple outboard motors of 15 kW to 40 kW power are given in a parallel document, IS0 9775, Small craft - Remote steering systems for single outboard motors of 15 kW to 40 kW power. 0 IS0 1990 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Gerkve 20 l Switzerland Printed in Switzerland ii SIST EN 28848:2000
---.~ ~----- INTERNATIONAL STANDARD IS0 8848:1990(E) Small craft - Remote steering systems 1 scope This International Standard specifies requirements and test methods for remote push-pull cable steer- ing systems and their major component items, used for small craft with single and twin installations of outboard motors of over 15 kW power, and all in- board motors, inboard motor-outdrives, and water- jet drives. 2 Definitions For the purposes of this International Standard, the following definitions apply. 2.1 steering system: Assembly including all com- ponents necessary to transmit remote manual effort to the rudder, outboard motor, inboard-outdrive or water-jet drive. 2.2 boat-mounted steering system: System in which an output ram guide tube is secured to the boat. 2.3 motor-mounted steering system: System in which an output ram guide tube is secured to the engine. 2.4 drag link: Device in a motor-mounted steering system by which the linear force of the output ram is transmitted to the motor steering arm. 2.5 helm: Mechanism, exclusive of a steering- wheel or other means for manual application of controlling force, by which controlling force is fed into a steering system cable or other force- transmission means. 2.6 minimum retained system performance: System capability after test(s) such that at least 90 % of the steering arc normally available each side of the mid-position may be obtained by exertion of no more than 27 N.m of torque at the helm, through the wheel or other normal control. This criterion does not define steering system per- formance while a boat is underway but is intended to provide quantitative limits for design and test purposes. =3 General requirements 3.1 When steering systems are factory-installed in the boat, the complete system shall be supplied. In outboard motor-boats, the system shall be supplied complete to the interface point at the ram output end as shown in figure 1. SIST EN 28848:2000
IS0 8848:1990(E) Dimensions in millimetres IS max., (at mid-travel position) 300 min. - Tubes l5,75 + 0,13 Coupler nut 7/8-14 UNF-2B thread (optional for boat-mounted systems) NOTE - Minimum travel : 100 mm each side of mid-travel position; maximum travel : 115 mm each side of mid-travel position. Figure 1 3.2 The steering system selected shall be installed in accordance with this International Standard. 3.3 Boats suitable for twin outboard motors shall be so designated, and it shall also be specified whether the boat is suitable for motor-mounted steering systems, boat-mounted steering systems or both. If the boat is suitable for boat-mounted steering systems, it shall also be specified whether well mounting, transom mounting or both (see figure2) may be used. 3.4 All threaded fasteners use of which affects safe operation of the steering system shall incorporate locking means. 3.5 Threaded fasteners use of which affects safe operation of the steering system and which are in- tended to be mounted or adjusted when installing the steering system in the boat, and which may be expected to be disturbed by installation or adjust- ment procedures, shall be locked by a locking de- vice provided with instructions for correct assembly Output ram and complying with the requirements in 3.5.1 to X5.3. 3.5.1 Loose lock-washers, fasteners with metallic distorting threads and adhesive are prohibited. 3.52 Plain, threaded jam nuts are prohibited ex- cept that they may be used to permit adjustment and shall be designed so that total separation of parts or other complete loss of steering will not occur should they loosen. NOTE 2 For assemblies not intended to be disassem- bled for installation, the choice of locking means is within the discretion of the system manufacturer. 3.5.3 A locking device shall be so designed that its presence can be determined by visual inspection or feel by a layman after installation. 3.6 Connection fittings including quick-disconnect fittings relying upon a spring or springs to maintain the connection shall not be used. SIST EN 28848:2000
IS0 8848:1990(E) Dimensions in millimetres Swivel axis to be 102-% square off face of transom (motor well k transom mounting) NOTE - If the swivel is mounted in the motor well side fitting, the motor well shall provide for 380 mm mid-travel position from the swivel axis to the motor axis. Swivel axis to be 12 max. above top of motor mounting face (motor well and transom mounting) 7/8--14 UNF-2B thread; min. length 16 on cable support tube Motor mounting face of the clamp bra Motor mounting 380 mid-travel position swivel axis to motor axis Articulation 15’ min. 380 mid-travel position swivel axis to motor axis a) Motor well mounting b) Transom mounting and NOTE - Minimum travel : 100 mm each side of mid-travel position; maximum travel : 115 mm each side of mid-travel position. Figure 2 - Boat-mounted steering system 4 Outboard motor and inboard-outdrive requirements 4.1 The steering stops on the outboard motor shall permit at least 30° of angular movement to either side of the centreline. 4.2 Outboard motors shall meet the applicable di- mensional requirements indicated in figure 3 and figure 4. 4.3 The necessary fittings to attach an outboard motor to the steering output ram shown in figure 1 shall be supplied with the outboard motor. 4.4 The outboard motor shall be designed so that, with any combination of motor turn and tilt, there shall be no damaging interference between the mo- tor, its accessories, and both the boat-mounted sys- tem installed as shown in figure2 and the motor-mounted system, provided the motor is de- signed for both systems. Appropriate written infor- mation and installation instructions shall be provided, clearly indicating the type of steering system(s) that should be used. 4.5 Outboard motors shall be designed so that the geometry ensures that a static load of 3300 N, ap- plied at the steering-arm connection point normal to the steering arm in its normal plane of operation, throughout the maximum steering arc, will not result in steering output ram loadings greater than those specified in 7.2.1. 4.6 The steering arm of the outboard motor shall be provided with a 318-24 UNF thread, or a plain hole of 9,65 mm to 9,9 mm diameter at the connection point. SIST EN 28848:2000
ISQ 8848:1990(E) 4.7 Inboard-outdrives shall be designed with proper geometry to ensure that a torque of 680 Nm applied about the outdrive steering axis will not re- sult in a steering component loading greater than that specified in 7.21. 5 Steering system requirements 5.1 Motor-mounted steering systems shall meet the dimensional requirements indicated in figure I, figure 3 and figure 4. Ti 5.2 Boat-mounted steering systems for outboard motor installations shall meet the dimensional re- quirements indicated in figure 1 and figure 2. When a joint as shown in figure 2 is replaced by a uni- versal joint with two movement axes, the axis per- pendicular to the transom face shall be located 0 to 13 mm above the motor clamp bracket horizontal mounting face. The second axis shall be 100 mm to 115 mm from the inner surface of the transom and shall be not more than 28,5 mm from the first axis toward the motor. 5.3 Steering cables shall be marked at the engine end with a steering system length which shall be the length from the steering-wheel shaft centre to the hole centre in the steering output ram at the mid- travel position. 5.4 Installation instructions for steering helms shall include recommendations for the maximum diameter and deepest wheel dish (see figure 5) that may be used with the helm. In addition, the maxi- mum diameter and deepest wheel dish information shall be permanently marked on the helm assembly to be visible when the helm is installed with the wheel removed. Dimensions in millimetres Steering axis f---Steering arm Transom mating surf
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