In the present era of sophisticated technology, gear design has evolved to a high degree of perfection. The design and manufacture of precision cut gears, made from materials of high strength, have made it possible to produce gears which are capable of transmitting extremely large loads at extremely high circumferential speeds with very little noise, vibration and other undesirable aspects of gear drives. The gears are used for power transmission and also in marine and aerospace applications; where accuracy and power transmission capacity are the requirements. High speed gears (of the order of 30,000rpm) have to be of high quality to maintain contact and keep contact stresses within the limits. The analytical investigation is based on modified Lewis stress formula. The present work deals with the optimization of design and analysis of helical gear with aluminum alloy for high-speed marine applications
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