It took 15 years of frustration, perseverance, and over 5,000 prototypes for james to finally launch the dyson dc01 vacuum cleaner under his own name. Within 22 months it became the best-selling cleaner in the uk. "i wanted to give up almost every day. But one of the things i did when i was young was long distance running, from a mile up to ten miles. They wouldn't let me run more than ten miles at school - in those days they thought you'd drop down dead or something. And i was quite good at it, not because i was physically good, but because i had more determination. I learned determination from it." "a lot of people give up when the world seems to be against them, but that's the point when you should push a little harder. I use the analogy of running a race. It seems as though you can't carry on, but if you just get through the pain barrier, you'll see the end and be okay. Often, just around the corner is where the solution will happen." new ideas are the lifeblood of dyson. There are 650 engineers and scientists based there. Thinking, testing, breaking, questioning. They're a varied bunch, too. Many are design engineers developing new ideas and technology. Then there are specialists who test and improve different aspects of each machine, from the way they sound to what they pick up. Some will have years of experience. Others are fresh out of universities like the royal college of art, brunel or loughborough. They share some eclectic engineering pastimes - from building vintage cars to reconstructing medieval catapults. One design engineer also has a jet engine he'll fire up in the back garden once in a while.