Although in the world of internal combustion engines it was actually said: “There is no substitute for displacement, except ... by even more displacement”. This is because the displacement usually went hand in hand with a high torque available over a wide speed range. But with an electric motor and especially with the drive of the TWIKE 5, the orque is available. More than enough.
The challenge is more about efficiency. The TWIKE 5 is actually already good because of its low weight and optimally reduced size. Then why still get better again? Because it makes sense. And because it is still possible in the current development phase. But also because the eventual change to a robust but smaller in capacity battery cell prompts us to do so, we do not want to endanger the targeted WLTP range of 400 km. A short vehicle length does not generally offer the best conditions for this. An intensive simulation shows, however, that a drag coefficient of 0.24 can be achieved with minor modifications.
A further improvement to 0.21 requires deeper measures and, above all, more intensive simulation work, but it can foreseeably reduce the WLTP consumption from an already impressive 7 to 6.5 kWh per 100 km. The focus of development work is still on the shell, the chassis parts and the drive. This gives the opportunity to further optimize the exterior surfaces. And we would like to take advantage of this opportunity. For this purpose, the source of every disturbing air vortex (magenta blue in the picture above) will be traced successively from the front spoiler to the spoiler edge of the diffuser and the resistance will be reduced again.