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Post by martinpolley on May 21, 2015 1:27:04 GMT -8
Hi folks, I'm building a rocket core-based mud oven. It has a standard firebrick J-tube, which is why I'm posting this here instead of in the stoves section. The feed tube and burn tunnel are from standard firebricks (built like the one in this video—because I don't have an angle grinder for cutting bricks…). But I have bought splits for the heat riser, figuring that they will heat up faster, which is A Good Thing. The thing is, splits arranged in a square have a larger internal CSA than standard firebricks do (when arranged the same way, as they are in the previous course). Which means I can either build the heat riser with a larger CSA than the burn tunnel, like this: or I can do it so the splits line up with the bricks in the previous course, like this: My question is this: which is better? Or doesn't it really matter? Cheers, Martin
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Post by belgiangulch on May 21, 2015 3:29:12 GMT -8
Much better to keep the splits lined up with the lower course. Keep the same csa throughout the riser & tunnel.
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Post by martinpolley on May 21, 2015 8:47:20 GMT -8
Thanks belgiangulch! That's what I'll do. It also means a bit more space for insulation.
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