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3min chapter
Engineering for Change, with Will Butler-Adams
Intelligence Squared
How to Weld a Folding Bike
In the book, you talk about thisavertsement back in ninete 87 for torch welders. But of course, the bike isn't welded at alld. It's made by this process known as brazing. And we're using something more similar to a sort of solder or glue. This is lower temperature, and it has some real advantages. By putting in less heat, you distort the frame less which gives you better wheel alinement. Also, it weakens the metal less, because you get shrinking when the metal cools. That means the bike is atually stronger. Tu the down side is it's quite hard to train someone. It takes a long
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