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Old May 28th, 2019, 06:42 AM   #1
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[kropotkin thinks...] - Tom's Tech Treasures: Carbon Swingarms, New Seats, And Sensor

If you enjoyed reading this article, please click here to view it on Kropotkin's site, MotoGP Matters.

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Carbon swingarm on Pol Espargaro's KTM RC16
Peter Bom: Interesting to note that KTM's first attempt at a carbon swingarm gave an immediate improvement. At Aprilia, for example, we have seen a number of different prototype carbon swingarms, but the riders have so far always reverted to the aluminum items. Apart from the weight – Pol Espargaro says the bike is still around 5kg too heavy – carbon fiber has one major advantage as a material for a swingarm: you can modify stiffness in both force and direction just by changing layering, using the same mold. Producing a mold can be expensive, but because it can be reused to produce different swingarms, it is still an attractive proposition.


Load cell on the Ducati GP19, used for the quickshifter
Peter Bom: The red cylinder is a so-called load cell. It measures extremely precisely exactly how much pressure (in compression or tension) is being put through it. This information is used by the ECU to make changing gear up or down easier, by cutting the ignition once the load reaches a preset value as the rider presses the gear lever down or up. The sensors used in MotoGP have to be extremely precise, and most importantly, they have to provide stable output even when exposed to severe vibration and high temperatures. The both thread on a sensor like this broke on Fabio Quartararo's bike at Jerez, leaving him unable to change gear.





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