Belt braced for land speed record attempt
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Transmission Developments product story
Edited by the Engineeringtalk editorial team
Jun 20, 2006
Transdev is one of the main sponsors for the e=motion speed record attempt, and provide the main belt drive and motor coupling system.
2006 marks the date that e=motion, the battery powered streamliner, will make an attempt on the British land speed record for electric cars at RAF Fairford in Gloucestershire.
The super fast e=motion is the brainchild of enthusiasts Mark Newby and Colin Fallows of Primetime Land Speed Engineering.
Transdev is one of the main sponsors for the attempt, and provides the main belt drive and motor coupling system using Breco and Synchroflex ATP10 GEN III belts and precision ATP pulleys.
At over 10m in length, e=motion has a cross section of around 762 x 610mm which provides a very tight space for the driver, 52 onboard 12V DC batteries and two, through-ventilated 6000rev/min AC motors controlled by variable speed drives.
Transdev needed to be completely sure that the belt drive system would transfer over 500bhp with total reliability and chose 75mm wide ATP10 GEN III belts for the job.
The rear-axle driven speed-monster has a theoretical road speed of over 480km/h and an acceleration performance which outstrips a Formula 1 racing car.
With the single belt and five pulley drive system providing the complete power transfer from motor shaft to rear axle, the extreme forces and dynamic loading endured is a severe testing for these components; the choice of ATP 15 GEN III belts and pulleys reflect the quality and durability of the product.
Breco and Synchroflex GEN III timing belts combine closer wound high tensile steel tension members with a new, polymer loaded, polyurethane for neutral belt tracking and reduced friction on flangeless pulleys.
Improved distribution of peripheral forces, with up to 30% additional tooth meshing, results in a 25% improvement in torque transmission over standard AT and ATP versions.
Other benefits include longer life, reduced noise and maintenance free operation.
The range is available in seven standard belt widths from 16 to 150mm, with other special widths to order, and in standard lengths up to 5000mm.
AT3, AT5, AT10 and ATP10 pitch variants are available in a wide range of configurations including single or double sided, reinforced belt backings, anti-static, coloured, machine ground and punched versions.
The challenge will take place on the runway at RAF Fairford in Gloucestershire as part of a unique double attempt that also includes a bid for the Outright British land speed record by Primetime Land Speed Engineering with its pair of afterburning jet cars Vampire and Split Second.
All three cars will be on display the following weekend at RAF Fairford for the Royal International Air Tattoo on 15th and 16th July.
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