Lion II

Firstly, the team and the engineers drew concept art to have a basis to rely on. Ideas were thinned down to some important tenets: Using the concept of different axis sizes, with a smaller axis on the back to reduce the projected frontal area and a larger axis on the front in order to decrease the rolling effects on curves, which makes it safer. a large distance between both axis to increase the car´s ability to move in a straight line without turbulence. The conclusion was to use a 3-part carbon fiber shell to speed up disassembling of the vehicle, reducing the time taken for mechanical repairs during the race. We decided to build the chassis using thin-walled aluminium tubes with a thickness of  Ø 19mm and a total thickness of 1,5 mm, soldered, of the “Space Frame” type. We chose Special 16” rim wheels to increase the tangential load, facilitating the initial acceleration of the vehicle whilst consuming less battery. Moreover, there is an extra ray per step in order to increase the lateral load capacity. It has Independent rear traction (eliminating the need for a differential) on only one of the rear wheels, with a three-speed gearbox. The other rear wheel has a brake installed, reducing the complexity of the project and also decreasing the total weight of the car, one of the main factors that affect speed. The project design was completely developed using 3D modelling with CATIA V5, made by Dassault Systemes. We transferred information in 3D from the CAD to the CAE then the CAM, allowing for the development of all tools, using CNC three-dimensional machining machines, via IGES and STEP neutral files. Using these specifications, we conducted a battery of simulations to verify theoretical performance. After this, the carbon fiber was molded to specification and the aluminium chassis was soldered and assembled. Capture