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The Helicopter with Radioactive Blades

29 pointsby zdwyesterday at 5:44 PM1 commentview on HN

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46Bittoday at 4:33 PM

The article is very vague on how the radioactivity allows detection of leaking gas.

The video at the bottom explains from 7:50 in. Gas pressure pressing on a spring holds a radiation shield in place. If the gas leaks the shield moves and the radiation can be detected.