A great ball contraption mobile carrier, like a dump truck or forklift ascends a ramp before dumping or tipping its load, allowing unloading at a higher level than it started.
- Would require wide ramps if the vehicle turns at top.
- Backing down after delivery might be easier.
- The mobile carrier could follow guide rails or optically follow a line. The slope of the ramp is limited by the carrier's ability to negotiate it, so it might require a significant ramp.
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- "The Great Ball Contraption." <http://www.teamhassenplug.org/GBC/contraptionideas.htm>.