The Challenge

This week our teams will have to earn their Scrapheap wings! Norfolk bikers, The Thirsty Knights, and Honda head honchos, The Fireblades, won't actually be leaving terra firma but they will be challenged to build cars that are powered and steered by a propeller!

The Fireblades

Steve Martindale (Smarty), Chris Barfe (Barfy) and George Wise (Big George) have known and drunk with each other for 10-15 years and work in different divisions at Honda UK. They have a broad span of interests ranging from motorcycle racing, classic cars and Raleigh Choppers to singing rock 'n' roll, Chelsea FC and running marathons! They are confident that between them there is not an engine around that they haven't worked on. These boys like power and speed and as long as it's fast, they don't care what they build!

The Fireblades' expert is John Gifford, a Scrapheap veteran who appeared in series 5's Hovercraft. He is one of the UK's foremost hovercraft designers. He built his first hovercraft at the age of 16 and recently appeared in a Bond film as a hovercraft stunt driver. His firm, Griffon Hovercraft, builds vessels for coastguards and the military.

The Thirsty Knights

Frog Twissell, (yes, that's his real name) Pete Twissell and Carl Verlander (Roo) combine to bring you The Thirsty Knights. Frog is a paragliding Buddhist vegan who likes to play with fire, Pete is a pagan who says he has an empathy with machinery and is to nuts, cogs and engines what Dr Dolittle is to animals and Roo is a welder extraordinaire who claims he can tap dance whilst playing the flute!

This team are quirky, alternative and very intelligent. Yet another team who love their bikes, they have owned, built, raced and maintained many over the years. Used to thinking laterally around a problem, they love designing the weird-and-wonderful. Their machine will be a creation in every sense of the word!

Billy Brooks is The Thirsty Knights' expert and he's a mad inventor and microlight-flying maniac. Billy is also a Scrapheap veteran, appearing in series 2's Flying Machines as well as Scrapheap's US equivalent Junkyard Wars. His day job is as a microlight designer but by night he can be found living on his barge.

The judge

Judge Brendan O'Brien holds the world record for holding the most world records in aviation. His day job is a stunt flyer – you don't need a hobby with that on your CV. One of Brendan's future projects includes crossing Greenland on a propeller-powered microlight sled. As you do …