M Ljin wrote:My thought is that rocket systems are likely not used traditionally because historically, the cost of the metal parts would be prohibitive. Except I don't recall batch systems using a ton of metal, but I am not entirely clear on how they work either...
You can build a perfectly good rocket using various materials - actually metal isn't the best as I understand it because you want an insulated firebox to get the high temperatures for a really efficient burn, and metals will fail in the hot oxidising atmosphere (like the wood does).
Even on a clean burn, you will want to access the channels for ash clean out though.
Benjamin Dinkel wrote:it's basically a big stratification chamber
If we look at it like that, the possibilities are indeed interesting

Although you'd have to tune it to avoid the draft stalling I expect.