Personal and Public Transport Systems

Paper Summary:

This paper takes three different forms of transport, the aXcess car, the Millennium Train and the PRST-4 Mountain Bike and analyzes how they work together with comprehensive pictures and diagrams. For each method of transformation it gives an overview and looks at the workings of the wheels, frame, body and brakes. It then proceeds to compare and contrast the differences between the wheels, frame, body and brakes in the different modes of transport. It concludes with a look at the process of forming for bike and car tires.

From the Paper:

"The forming of a polyurethane micro cellular bike tyre (such as Urethon's tyres which are puncture proof and can be recycled) begins by metering a specially formulated liquid consisting of polyurethane, polyol and, isocyanate components in a high pressure-metering cylinder type polyurethane dispensing machine. The liquid then passes through an impingement chamber into a mould (a polyurethane elastomer, manufactured by casting a specially formulated polyurethane into different tyre sized aluminium moulds), which is designed to have different tread rings fitted, with nylon cord for reinforcement of the tyre pre fitted (the cord stops the tyre slipping from the wheel rim). The mould is then clamped to a centrifugal casting machine, which spins the moulds at between 200-400rpm."

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