JCB Dieselmax
| JCB Dieselmax | |
|---|---|
 |
|
| Overview | |
| Manufacturer | Visioneering |
| Body and chassis | |
| Class | Land speed record vehicle (diesel) |
| Body style | Long |
| Layout | Dual-engine, 4-wheel drive |
| Platform | Hybrid square steel tube spaceframe with bonded carbon composite panels |
| Powertrain | |
| Engine | Two JCB444 common rail injection diesel engines with twin compound turbochargers and intercoolers |
| Transmission | Forward transmission and final drive connected to forward engine; rear transmission and final drive unit connected to rear engine |
| Dimensions | |
| Wheelbase | 5.9 m |
| Length | 9.1 m |
| Width | 1.15 m |
| Height | 0.98 m to canopy; 1.34 m to fin tip |
| Curb weight | 2.7 tonnes |
The JCB Dieselmax is a diesel-engined 'streamliner' car designed for the purpose of breaking the land speed record for a diesel-engined vehicle.
The car was built for JCB, a British multinational equipment company. As of 2014, the car holds the world diesel-powered land speed record, having been driven to over 350 miles per hour (560 km/h) by Wing Commander Andy Green in 2006.
The car is powered by two specially-tuned versions of the production JCB444 powerplant, developing up to 750 brake horsepower (560 kW) each (over five times the power output of the production version with 90psi (6bar) of boost) and featuring four cylinders and 5 litres of displacement, accompanied by two stage turbochargers, intercooler and aftercooler. One of the dual engines drives the front wheels while the other drives the rear. Each engine is rev-limited to 3800 rpm.
As the size of the car prohibited meaningful wind tunnel testing, the streamlined shape of the car was refined entirely through the use of computational fluid dynamics by MIRA Ltd, which has enabled the car to obtain a very low coefficient of drag of only 0.147 and a CdA value (drag coefficient × frontal area) of only 0.129 m². The fuel tank, which holds only 9 litres (2.38 U.S. gallons), is located directly behind the carbon fiber cockpit. The fully laden weight of the vehicle, including fuel, oil, ice, water coolant and the driver, is slightly less than 2,700 kg.
The chassis was designed and built by Coventry-based engineering company Visioneering for JCB, with engine development undertaken by Sussex-based Ricardo UK Ltd. The electrical system for the vehicle was supplied by R&D Vehicle Systems Ltd under contract to Visioneering.
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