Human Electric Trike Thesis

Design of an electrically assisted human powered trike

Gearing calculations

Posted by Bob Dold on Monday, September 25, 2006 11:50 PM

A spreadsheet was constructed to calculate the optimum gearing for the trike, by using a 14 tooth sprocket on the scooter gearbox and a 34 tooth cog on a mid drive, the motor can be geared down enough to allow the motor to make it up a 10% grade.

The picture below illustrates the chain drive layout:

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