Calculating Gear Ratio for Epicyclic Gear Train

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SUMMARY

The discussion focuses on calculating the gear ratio for an epicyclic gear train with specific parameters: gear C has 100 teeth, gear B has 50 teeth (fixed), gear D has 50 teeth, and gear E has 200 teeth. The primary goal is to determine the overall gearbox ratio based on these values. The user has attempted a solution and seeks validation of their calculations, particularly regarding the C/D ratio.

PREREQUISITES
  • Understanding of epicyclic gear trains
  • Knowledge of gear ratios and their calculations
  • Familiarity with basic mechanical engineering principles
  • Ability to interpret and create gear tables
NEXT STEPS
  • Research the formula for calculating gear ratios in epicyclic gear trains
  • Learn about the impact of fixed gears on overall gearbox performance
  • Explore examples of gear train calculations in mechanical engineering textbooks
  • Study software tools for simulating gear systems and their ratios
USEFUL FOR

Mechanical engineering students, automotive engineers, and anyone involved in the design and analysis of gear systems will benefit from this discussion.

lewisbedwell
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Homework Statement



Here the gear B is fixed and C and D are on the same drive. If C has 100 teeth, B has 50, D has 50 and E has 200. Calculate the ratio of the gearbox.


Homework Equations





The Attempt at a Solution



My attempt is uploaded as an attachment as putting tables in here is a bit of a mission, just wanted to see if what i have done is correct. Thanks a lot in advance!
 

Attachments

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    Untitled.png
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  • solution.png
    solution.png
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The result for E looks right, but check the c/d column.
 

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