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System ready for test

System ready for test

(Click to enlarge photo)

And here is the system finally ready for testing. I usually make the outer part of the air-jacket of the burner from plastic-coated steel sheet (that's what I had to hand). You can see some staining around the burner and that is the plastic degrading as it gets hot. It never actually catches fire because the outer surface doesn't get hot enough due to the constant flow of air inside. It is this constant flow of air around and through the burner that allows an ordinary piece of steel to be used as the main tube as it is the air that stops it from melting. For greater efficiency and a higher burn temperature the main tube could be made from reflective cast-iron or have a layer of refractory material inside.


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©2014 FIRECRACKER™GUW ALL RIGHTS RESERVED