Chassis of rollercoaster-waggon, detail of <a href="//commons.wikimedia.org/wiki/File:RollercoasterChassis_Ackermann_train.svg" title="File:RollercoasterChassis Ackermann train.svg">File:RollercoasterChassis Ackermann train.svg</a>
original and editor:<a href="//commons.wikimedia.org/wiki/User:Carnaubo" title="User:Carnaubo">Carnaubo</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>