ISO INTERNATIONAL STANDARD 21648 First edition 2008-12-01 Space systems Flywheel module design and testing Systemes spatiaux - Conception et essai du module de volant moteur Reference number ISO 21648:2008(E) @ ISO 2008 ISO 21648:2008(E) Contents Page Foreword. iv Introduction 1 Scope 2 Terms, definitions, symbols and abbreviated terms. 2.1 Terms and definitions... 2.2 Symbols.... 2.3 Abbreviated terms 3 Requirements..... 3.1 General requirements 3.2 Design requirements. 3.3 Requirementsformaterials 3.4 Fabrication and process control 14 3.5 Quality assurance ... 15 3.6 Repair and refurbishment. 16 3.7 Storage requirements..... 16 3.8 Transportation requirements. 16 4 Verification requirements. 17 4.1 Design requirements verification.. 17 4.2 Qualification tests 20 4.3 Acceptancetests 24 @ ISO 2008 - All rights reserved ii ISO 21648:2008(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 member body interested in a subject for which a technical committee has been International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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 held responsible for identifying any or all such patent rights. ISO 21648 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 14, Space systems and operations. iv Iso 2008 -All rights reserved