There are a lot of things Gav and Dan don't have access to in the back garden. This combustion tube is one of those things. Time to go to Indiana!
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Thanks to:

Purdue University for allowing us to film this combustion tube! -

And Destin from Smarter Every Day for lending us the camera -

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Filmed at 1000fps and 28,500fps with the Phantom Flex 4K and the Phantom V2511
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