Scrapheap Challenge (UK) 4x05. White Water Rider (Original)

S04E05 White Water Rider January 2, 2002 Channel 4 The challenge is to build a powered craft to negotiate a stretch of white-water river. The craft must be powerful enough to get up the rapids but also have enough manoeuvrability to avoid treacherous rocks and to make a U-turn at the top of the course. Whoever sets the fastest single time in the course of three heats is the winner.