Cart undercarriage and alternative cart design

The undercarriage was modeled to look similar to the cart found in the design template. The undercarriage consists of four connections between the cart and the track, where each connection has of six wheels that surround the rail in three directions; above, outwards and below. There is also a shock absorber mounted below the head of the cart.

Our cart design template. (source: http://www.coastergallery.com/2009/LaR60.html)

The model for the "wheel" was created by extruding faces from a square primitive until we got the sought after shape that lets the six wheels align correctly with the rail of the track.

Model design for the rail connections of the cart.

The four wheels were places under the cart, attached to the rest of the undercarriage (a simple cube) that also features the shock absorber. The absorber consists of two cylinders, each with a small line indentation around the middle of the cylinder for looks. 

The undercarriage of the cart.

A second design for the cart was also created. It is a variation of the cart that will be at the head of the roller coaster, and will not feature the aerodynamic head. It was created by copying the rear part of the cart and placing it in the front, resizing its width so that both rows of chairs have the same amount of legroom and distance to the handlebars. In order to flip the copied rear half of the cart, we scaled it negatively in the appropriate axis. This changes the normals for the surface, so in order for any future textures to show up on the right side of the surface the normals of half the model were reversed. The final look for both carts can be seen below.

Front and rear cart models.