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Currently, the final gear reduction stages in virtually all helicopter main rotor drives consist of one or two simple spur planetary stages. These simple planetaries are composed of a sun gear, multiple planet gears (typically between 3...

The load capacity of power transmitting gears can be limited by different failure modes. Standardized calculation methods acc. to German (DIN) or International (ISO) standard are available for rating the pitting resistance and bending strength of gear...

The three Carrier Vertical Strike (CVS) platforms in service with the UK Royal Navy (RN) provide the platform and facilities for the command and control of maritime and joint forces. They are 209m in length, displace 22,000...

As a gear pair rotates through mesh the number of teeth in contact changes. For a spur gear with a contact ratio between one and two, the number of teeth in contact changes from a single pair,...

Extended gear fatigue pitting life is not only an es-sential performance requirement for today’s auto-motiveand industrial gearoils butalso forautomatic transmission fluids (ATF) or continuously variable speed transmission (CVT) fluids . Paststudies had shown that both gear surface...

In this paper a simple method to minimize the Peak to Peak Transmission Error (PPTE) for a spur gear set is proposed. A parametric analysis using advanced software was performed to obtain a general understanding of the...

Modern gear calculation programs give us the possibilityto determine the load carrying capacityand the noise behavior of a gear transmission considering the shaft and bearing system, the tooth modifications and the production deviations. While load and stress...

For gear transmissions dfferent levels of requirements with regard to noise excitation have to be matched. Industrial applications for conveyor belts or cement mills are without doubt much less sensitive with respect to noise emission than military...