%0 Journal Article %T Mechanical Efficiency of Planetary Gear Trains: An Estimate %A A. Srinath %A G. Yedukondalu %A A. Jagadeesh %J Mechanical Engineering Research %D 2011 %I %R 10.5539/mer.v1n1p97 %X In this paper an easy method is presented to estimate the mechanical efficiency of a gear-train-when the number of teeth on gear wheels is specified. Also, the influence of the structure is included in estimating the efficiency. This helps in comparing the gear trains for mechanical efficiency. %U http://www.ccsenet.org/journal/index.php/mer/article/view/13149