European agencies are working to give international status to a large part of the engineering and management documents of the European Cooperation for Space Standardization (ECSS). They are supported by a mandate from the European Commission. ECSS is drafting documents for project management, and safety for space programs and engineering. The group will first submit the documents to the European Committee for Standardization (CEN) for publication as European standards. They are to complement standards prepared by the European Association of Aerospace Industries, an arm of CEN. For details, contact Hugues Plissart, CEN's deputy director for standards programs. FAX +32 2 550 08 19, or e-mail him at email@example.com.
The choice between helical and spur gears in gearboxes may seem straightforward. But with planetary gearboxes, however, the choice between helical and spur gears requires some additional thought. Here’s what you need to know to make the right choice.
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