Wednesday, 21 April 2010

2 milligrams is the magic number

So the new CAA rules are: you can fly if the ash concentration is less than 0.002g (2 milligrams) per cubic metre of air.

Fortunately the ash cloud above the UK only has a concentration of 0.001gm-3 so that's alright, all UK airports are now open.

There's some suggestion of higher density "dark blobs". They'll just have to fly around those.

Panic over.

The only question remaining is: did we need to stop flying at all?

BBC

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