I need pdf or full details about two wheeler propeller shaft

A shaft-driven bicycle is a bicycle that uses
a drive shaft instead of a chain to transmit power
from the pedals to the wheel arrangement
displayed in the following fig 1. Shaft drives
were introduced over a century ago, but were
mostly supplanted by chain-driven bicycles due
to the gear ranges possible with sprockets
and derailleur. Recently, due to advancements in
internal gear technology, a small number of
modern shaft-driven bicycles have been
introduced. Shaft-driven bikes have a
large bevel gear where a conventional bike
would have its chain ring. This meshes with
another bevel gear mounted on the drive shaft