Junkyard Wars

Scrapheap Challenge is a British television show where teams of contestants build a working machine that could do a specific task, using materials available in a scrapheap. The series features teams of four or five given ten hours to build vehicles, or machines to complete a specific task, such as being a trebuchet, or complete a racecourse whilst acting as a gyroscope. The series ran for eleven series, and originally shown on Channel 4. The format was exported to the United States, where it was known as Junkyard Wars. The US show was also produced by RDF Media, and was originally shown on The Learning Channel. Repeats have aired on another Discovery network, the Science Channel.