Gravity Vehicle

Gravity Vehicle is an new event for 2012 competition season. It is similar to the old Scrambler event, except that Gravity Vehicle does not involve an egg.

=Construction=

The Ramp
A ramp is used to direct the energy into propelling your vehicle forward. Ideally, it would be best if the ramp was adjustable. One way to do this is by hinging your ramp at the front end (the area that touches the floor) and using supports of various heights to raise the back end, resulting in different slopes. Also, you can use the system that is used on pool chairs, although it may be more complex to build.

The surface of your ramp must be smooth as possible, in order to reduce friction, a waste of energy. Some materials to keep in mind are: However, also realize that if the surface of the ramp is too slippery, and the wheels of your vehicle also lack grip, you will have problems with the straightness of your vehicle's path.
 * Plastic (flimsy, very low level of friction)
 * Metal (more rigid than plastic, offers similar level of friction)
 * Wood (smooth wood is rigid, and decently smooth. May also be easier to work *with)
 * Plexiglas (flimsy if using thin sheets, similar friction level as plastic)

The Vehicle
Regardless of what aspect, your vehicle will need to be light (but not so light that it doesnt have any traction). Construction of the vehicle will be similar to "vehicle" events in the past, like Wheeled Vehicle, Electric Vehicle, Mousetrap Vehicle, and most notably Scrambler.

Chassis
The chassis of your vehicle will need to be rigid and well built. A flimsy chassis will result in an unpredictable path, leading to a loss of points. Some materials for the chassis are: Some materials will work better than others, a combination might work best. When building your chassis, ensure that you have right angles and that your axles will be situated perpendicular to the direction of travel. This is crucial. Also, an adjustable steering system might be of use if you cannot build your chassis as wished.
 * Wood
 * Metal
 * Plexiglas
 * Plastic

Axles
Axles connect your wheels to your chassis. They will need to be non-flexible and stiff. A crooked axle will greatly affect the path of your vehicle. Materials for the axles include:
 * Wooden dowels
 * Brass/Aluminum rods
 * Plastic dowels

Wheels
The wheels will need to be straight as well as thick. There are multiple things to consider when choosing wheels. For example, thick or thin? Large or small? 3 or 4? The answer will depend on your ramp design and vehicle. Common choices for wheels are: The last option is not recommended unless you have the proper tools and abilities to make perfectly circular wheels.
 * CDs
 * Hobby airplane wheels
 * Home-made wheels