Epicyclic Gear Box or Wilson Gear Box, Mechanical Engineering

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an arrangement of the wilson epicyclic gearbox giving four forward and one reverse speed of shaft D for an input speed of shaft E is shown in fig .3.in 1st gear Ii is fixed.in 2 gear I2 is fixed .in 3 gear S3 is fixed .top gear F is locked to Gi, reverse gearI\is connected to S4 and h is fixed . the number of teeth on thegears are :Si=20,S2=20,S3=17,Sa=26,h=70,h=70,h=61and74=70.calculate allthe gear ratios.if22.1kw is transmitted in 1st gear at an engine speed of 3000 rpm ,find the required fixing torque on the annulusI

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