The latest version of Challenger’s RoGator 600C is capable of spraying at speeds of up to 30km/hr. On display for the first time at next week’s French SIMA Show, and likely to appeal to current SpraCoupe owners looking to upgrade, the new maximum field speed is 43% faster than the previous 21km/hr. To achieve this extra speed the trio of 600C models are fitted with heavier duty and more powerful wheel motors with increased torque, while the centre frame has been redesigned with less parts and pivot points for improved boom stability. Travelling at faster speeds requires greater nozzle opening to allow higher volumes of liquid to travel through the sprayer to maintain the same application rate. Dual Nozzle Shut Off is the name of a new technique designed to do just this. The system utilises two small nozzles, which combined have the same output as one large one. The system provides the possibility to engage both nozzles when the operator wants to drive at speeds that are outside the normal range of the first nozzle. Finally, the six-cylinder AGCO Power engine in the RG 645C (224hp) and RG 655C (242hp) already meets Stage IV (Tier 4f). The four-cylinder 4.9-litre AGCO Power engine in the RG 635C (175hp) now also meets Stage IV (Tier 4f) requirements. Meeting the emissions standards in the four-cylinder power pack has been achieved in the same way as the six-cylinder models, by only adding AdBlue and there is no EGR.