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Drive belts to take a pounding in record attempt

A Transmission Developments product story
Edited by the Engineeringtalk editorial team Apr 25, 2005

Transdev designed the main drive of the e=motion world electric vehicle land speed challenger around Breco ATP15 Gen III belts and precision ATP pulleys.

On May 5th 2005, in the Nevada desert, e=motion, the world electric vehicle land speed challenger will attempt to cruise past the existing record of 395km/h and become the first all electric vehicle to break the 483km/h (300mile/h) barrier.

Among the leading sponsors and supporters for the project, Transdev, the UK's premier-league mechanical power transmission specialist, has designed the main drive around Breco ATP15 Gen III belts and precision ATP pulleys for the extremely demanding transmission system used on the 10m-long vehicle.

Designed and built in the UK, e=motion is rear axle driven via a five pulley system using a single 75mm wide ATP15 Gen III belt.

A belt drive rather than a geared drive system was considered the most efficient method of transferring power from four, 75kW motors to the axle and provides a mechanical reduction for the motors which run up to 6000rev/min, allowing road speeds of more than 483km/h.

Powered from 52 x 12V lead-acid batteries, the force-cooled inverter motors will run for only 3min or so from each charge and will produce a combined output of nearly 500 brake horsepower with acceleration controlled entirely by ABB variable speed drives.

As the e=motion vehicle's amazing acceleration, faster than an F1 racing car, is the key to the record attempt, the power transmission system will be taking a significant pounding.

The choice of ATP15 Gen III belts and ATP pulleys are a critical factor in determining a design realistically capable of achieving the new record and reflects the quality and durability of the product.

Breco and Synchroflex Gen III timing belts provide up to 60% higher power transmission than the standard version and combines a unique, more tightly packed, neutral tracking, high tensile steel cord structure with wear resistant, polymer loaded, polyurethane for longer life, optimised belt tracking, reduced noise and maintenance free operation.

Available in seven standard belt widths from 16 to 150mm, with other special widths to order and in standard lengths up to 5000mm, the range is complemented with AT3, AT5, AT10 and ATP10 pitch variants and is available in a wide range of configurations including single or double sided versions, reinforced belt backings, antistatic, coloured, machine ground and punched versions.

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