CR05 was an evolution of CR04; focused on getting better access to the engine bay by making it wider. This also increased packaging options. Suspension design included fixing a few issues with the CR04 design that were discovered at the event. Engine wise there was a focus on improving the packaging in the rear of the car, with a focus on improving the fuel tank & radiator sizing and positioning.
CR05 is another high stiffness - low density Aluminium honeycomb composite panel based full monocoque car. The chassis was designed based on the feed backed from previous cars' torsion test results. The car uses a light weight Aprilia V twin engine with optimised intake and exhaust. Cardiff racings in house engine dynamometer illustrates higher power to weight ratio than 4 cylinder alternatives in restricted conditions. The engine power is transmitted through a student design light weight spool which recorded faster lap times than a differential in tests. A similar suspension layout as previous cars was adopted to shorten development time, with Adams simulation results being used to aid this design process.
|Body||Aluminium honeycomb monocoque|
|Brakes||Custom cast iron discs. Spool / hub mounted|
|Suspension||Front and rear a-arm, push rod actuated|
|Tyres||Hoosier C2000 R25B|
|Wheels||3 piece, custom centres|
|Engine Name||Aprilia SXV 550 V-twin|
|Engine type||SOHC fluid cooled two cylinder four-stoke|
|Engine Capacity||553 cc|
|Bore & Stroke||80 x 55 (mm)|
|Compression Ratio||12.5 : 1|
|Inlet||Laser sintered plenum|
|Exhaust||2 into 1, stainless steel silencer|
|Drive Train||Student designed aluminium spool|
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