At the Experience Week this year at Centre Amma, at Pontgouin (near Chartres), we assembled a rocket stove in a matter of hours on the first day, tested it on the second day and disassembled it on the third.
Day two – testing
A rocket stove heats in three different ways. The air is led down, then along into a pipe inside a drum from which the only escape is down again into a horizontal pipe which leads to the chimney. See here for a detailed discussion.