1、BSI Standards Publication BS ISO 8267-1:2015 Aircraft Tow bar attachment fittings interface requirements Part 1: Main line aircraftBS ISO 8267-1:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 8267-1:2015. It supersedes BS ISO 8267-1:2005 which is withdr
2、awn. The UK participation in its preparation was entrusted to Technical Committee ACE/57, Air cargo and ground support equipment. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisio
3、ns of a contract. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 88913 4 ICS 49.100 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published
4、 under the authority of the Standards Policy and Strategy Committee on 31 October 2015. Amendments/corrigenda issued since publication Date T e x t a f f e c t e dBS ISO 8267-1:2015 ISO 2015 Aircraft Tow bar attachment fittings interface requirements Part 1: Main line aircraft Aronefs Exigences dint
5、erface des ferrures dattache de barre de tractage Partie 1: Aronefs de ligne INTERNATIONAL STANDARD ISO 8267-1 Second edition 2015-10-15 Reference number ISO 8267-1:2015(E)BS ISO 8267-1:2015ISO 8267-1:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switzerl
6、and All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be reque
7、sted from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.orgBS ISO 8267-1:2015ISO 8267-1:2015(E)Foreword iv I
8、ntroduction v 1 Scope . 1 2 Normative references 1 3 Terms and definitions . 1 4 Requirements 2 4.1 Fitting location 2 4.2 Towing loads . 2 4.3 Aircraft mass categories 3 4.4 Fitting configuration, dimensions and clearances . 3 4.5 Tow bar fit . 4 Bibliography 5 ISO 2015 All rights reserved iii Cont
9、ents PageBS ISO 8267-1:2015ISO 8267-1:2015(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each mem
10、ber body interested in a subject for which a technical committee has been established 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. ISO collaborates closely with the International El
11、ectrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different type
12、s of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be
13、held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is informa
14、tion given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the
15、 following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 9, Air cargo and ground equipment. This second edition of ISO 8267-1 cancels and replaces the first edition (ISO 8267-1:2005), which has been te
16、chnically revised. ISO 8267 consists of the following parts, under the general title Aircraft Tow bar attachment fittings interface requirements: Part 1: Main line aircraft Part 2: Regional aircraftiv ISO 2015 All rights reservedBS ISO 8267-1:2015ISO 8267-1:2015(E) Introduction The aim of this part
17、of ISO 8267 is to standardize main line aircraft tow bar attachment fittings according to aircraft mass category (which determines tow bar forces), so that one tow bar can be used for all aircraft within that mass category. Throughout this part of ISO 8267, the minimum essential criteria are identif
18、ied by the use of the key- word shall. Recommended criteria are identified by the use of the key-word should and, while not mandatory, are considered to be of primary importance in providing safe aircraft towing arrangements. Deviation from recommended criteria should only occur after careful consid
19、eration, extensive testing, and thorough service evaluation have shown alternative methods to be satisfactory. ISO 2015 All rights reserved vBS ISO 8267-1:2015BS ISO 8267-1:2015Aircraft Tow bar attachment fittings interface requirements Part 1: Main line aircraft 1 Scope This part of ISO 8267 specif
20、ies the interface requirements for tow bar attachment fittings on the nose gear (when towing operations are performed from the nose gear) in conventional tricycle type landing gears of commercial civil transport passenger and freight aircraft. Its purpose is to achieve tow bar attachment fittings in
21、terface standardization by aircraft mass category (which determines tow bar forces) in order to ensure that a single type of tow bar with a standard connection can be used for all aircraft types within or near that mass category, so as to assist operators and airport handling companies in reducing t
22、he number of different tow bar types used. This part of ISO 8267 is applicable to all new models of main line aircraft within the specified maximum ramp mass range, entering service or designed after its date of publication. This part of ISO 8267 is applicable to main line commercial transport aircr
23、aft of airworthiness certified under FAR/EASA-CS Parts 25 with a maximum ramp mass of 50 000 kg (110 000 lb). It does not apply to aircraft of airworthiness certified under FAR/EASA-CS Parts 25 but with a maximum ramp mass of 50 000 kg (110 000 lb), which are covered by ISO 8267-2. Where a family of
24、 existing or contemplated aircraft types bridges two mass categories, use a single tow bar attachment fitting interface for all of them, and consider the use of the standard dimensions for the higher mass category throughout the family. NOTE As far as practical, this part of ISO 8267 was defined in
25、order to be compatible with as many existing aircraft types as possible in the mass category concerned. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition c
26、ited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Federal Aviation Regulations (FAR) 14CFR Part 25, Airworthiness Standards: Transport category airplanes, paragraph 25.509, Towing loads 1) EASA CS-25, Airworthiness Standards: Tran
27、sport category aeroplanes, paragraph 25.509, Towing loads 2) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 1) FAR Part 25 constitute the USA government transport aircraft airworthiness regulations, and can be obtained from the following address
28、: US Government Printing Office, Mail Stop SSOP , Washington, DC 20402-9328, USA. 2) EASA CS-25 constitute the European Union transport aircraft airworthiness regulations, and can be obtained from the following address: www.easa.europa.eu INTERNATIONAL ST ANDARD ISO 8267-1:2015(E) ISO 2015 All right
29、s reserved 1BS ISO 8267-1:2015ISO 8267-1:2015(E) 3.1 main line aircraft civil passenger and/or freight transport aircraft with a maximum ramp mass of 50 000 kg (110 000 lb) 3.2 regional aircraft civil passenger and/or freight transport aircraft with a maximum ramp mass of 10 000 kg (22 000 lb) and 5
30、0 000 kg (110 000 lb) 3.3 maximum ramp mass MRW maximum mass allowable for an aircraft type when leaving its parking position either under its own power or towed, comprising maximum structural take-off mass (MTOW) and taxiing fuel allowance 4 Requirements 4.1 Fitting location The fitting shall be de
31、signed to enable straightforward attachment of the tow bar at the front and, where applicable, the rear of the aircraft nose landing gear for push/pull towing operations. An axle fitting may be used in the event of two-wheel nose landing gear. This is acceptable providing the towing loads do not exc
32、eed those specified in this part of ISO 8267 and the aircraft is designed accordingly. 4.2 Towing loads 4.2.1 The allowable towing forces on the nose landing gear shall be specified by the aircraft manufacturer and shall conform to 4.2.2 to 4.2.6. 4.2.2 The towing loads shall be applied to the tow b
33、ar attachment fittings and to the structure to which they are immediately attached. 4.2.3 The towing loads specified in 4.2.6 shall be considered separately. These loads shall be applied at the towing fittings and shall act parallel to the ground. In addition, a) a vertical load factor equal to 1,0
34、shall be considered as acting at the centre of gravity of the aircraft, and b) the shock struts and tyres shall be in their stationary positions. 4.2.4 If M ris the design maximum ramp mass of the aircraft and g is the mean acceleration due to gravity, the towing load, F TOW(N), is equal to 0,15 M r
35、 g. 4.2.5 With regard to towing loads where the specified angle of swivel cannot be reached, the maximum obtainable angle shall be used. 4.2.6 The specified towing loads are given in Table 1.2 ISO 2015 All rights reservedBS ISO 8267-1:2015ISO 8267-1:2015(E) Table 1 Specified towing loads Position of
36、 the nose gear Load Magnitude Direction Swivelled forward 1,0 F TOW Forward Aft Swivelled aft 1,0 F TOW Forward Aft Swivelled 45 from forward 0,5 F TOW Forward a Aft a Swivelled 45 from aft 0,5 F TOW Forward a Aft a aParallel and midway between the planes of the wheels. 4.3 Aircraft mass categories
37、See Table 2. Table 2 Aircraft mass categories Masses in kilograms (Values in pounds in parentheses) Category Maximum ramp mass, M r I 50 000 (110 000) 500 000 (1 100 000) The tow bar attachment fitting category shall be selected in such a way that no change of type will become necessary during aircr
38、aft development. Aircraft of a design which is near the upper limit of a mass category may be classified in the next higher category to allow for mass growth (see Clause 1). 4.4 Fitting configuration, dimensions and clearances The standard configuration of the attachment fitting shall be a horizonta
39、l cylindrical pin with the dimensions given in Figure 1 and in Table 3. Table 3 Dimensions of the pin Dimensions in millimetres (Values in inches in parentheses) Dimensions Category I II III IV V Diameter, A 38,10 44,45 57, 25 63,50 85,85 (1.50) (1.75) (2.25) (2.50) (3.38) Length, B 113,03 133,35 18
40、4,15 203,20 203,20 (4.45) (5.25) (7.25) (8.00) (8.00) ISO 2015 All rights reserved 3BS ISO 8267-1:2015ISO 8267-1:2015(E) Key 1: Diameter A 2: Length B NOTE Required space envelope for clearance: 3A above and below the towing spool centre. Figure 1 Dimensions of the pin 4.5 Tow bar fit The design of
41、the tow bar device that clamps to the horizontal cylindrical pin shall be such that it: grips the pin uniformly over 96 % to 98 % of the length (dimension B), and is adjustable in order to provide positive engagement on the pin when locked.4 ISO 2015 All rights reservedBS ISO 8267-1:2015ISO 8267-1:2
42、015(E) Bibliography 1 ISO 8267-2, Aircraft Tow bar attachment fittings interface requirements Part 2: Regional aircraft ISO 2015 All rights reserved 5BS ISO 8267-1:2015ISO 8267-1:2015(E) ISO 2015 All rights reserved ICS 49.100 Price based on 5 pagesThis page deliberately left blankBSI is the nationa
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