PLUG

• 1 motor M para tracção
• 1 motor M para direcção
• Direcção dianteira com parafuso sem-fim e sem return-to-centre
• Tracção traseira sem diferencial
• Eixo pendular dianteiro ou traseiro (mas não ambos)
• Nenhuma suspensão de molas

Creating suspension on Lego vehicles has always been a challenge for many reasons, the main one being that it is incredibly difficult to get the right amount of spring in the system. Too much and the suspension ends up stiff and won't do its job at all, too little and your vehicle will sink to the ground - with either or these outcomes you'd have been better off not bothering at all.

Given that you are unlikely to know the weight of a model you are building in advance, and that there are very few strengths of spring available in the same size for easy replacement, fixing the above situation will almost certainly require a major redesign. As if this wasn't enough, Lego suspension setups tend to have a lot of friction which reduces their effectiveness - they can be quite "sticky", and they often take up a lot of room in a model.

(...)

Given that motorised Lego models tend to travel relatively slowly, thereby making shocks and vibration negligible, and that there are no people aboard, it seems reasonable to remove the comfy ride requirement, which leads nicely into the concept of unsprung suspension.