Magnetic Encoders Boost Dragster Speed

Visitors to Renishaw's stand at Mach 2008 (hall 5, stand 5140) will be able to see Team Salakazi's KTM Super Twin nitromethane fuelled dragster which takes just 6.7 seconds to cover a 402m race track, achieving speeds of around 322km/h. Aided by Renishaw's rotary magnetic encoders that monitor crankshaft position and clutch speed, this 360kg 'rocket' generates 1417kW from just a 1995 cc engine.

Not many people would even consider sitting astride a snarling 1417kW engine travelling at over 300km per hour. But Jaska Salakazi from Finland has made a career of it, becoming the first person in the world to break the seven-second barrier over 402m on a Super Twin Top Fuel bike. Since 2000, the speed-obsessed six-man team at Salakazi Racing has continually designed, built and refined its KTM Super twin powered Dragster.

A recent modification is the addition of two RM22 compact high-speed rotary magnetic encoders, produced by Renishaw's partner company RLS. These measure clutch speed and monitor the position of the engine's crankshaft, helping to take the bike to extremely high speeds. Clutch slippage, traction and road conditions can all be precisely determined by comparing values from the encoders, providing the team's technicians with the vital data to pre-programme the bike and make final adjustments to the first stage counterweights before the race begins. Where milliseconds are crucial, the encoders enable the team to optimise clutch engagement and maximise speed and acceleration on the spot.

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