A first gas forge build lives or dies on burner tuning, and that is exactly where this one gets interesting. The flame burns yellow even with the air vents wide open, the maker worries it is running too rich, and there is unease about flame spilling out of the door. Instead of hiding that, the build is shown with the question left open.
The forge itself is a box-shaped metal furnace lined with white refractory ceramic insulation, set up on a workshop stand. The hinged insulated door has a small rectangular opening and is shut with an exterior handle. Inside the chamber sits a refractory floor plate, while a burner pipe assembly hooked to a gas hose comes in through the top and sends a steady flame downward into the heated space. Gas flow is adjusted with a tap on the burner, and the jet on the tap measures about 1.2 mm.
In use, the elongated metal workpiece inside glows yellow-orange under direct heat. With the door shut, a big plume of purplish-blue and orange flame billows out.
Two questions remain open: whether a smaller jet would clear up the flame, and whether something else is being missed entirely. For a first build the construction looks tidy to me, and the white lining against the glowing metal reads well. Getting the burn tuned is the part that separates a working forge from a frustrating one, and the maker seems to be asking the right questions at the right stage.