D.I.Y. Rocket Stove
I made this rocket test burner, it reached 410 °C (= 770 °F), the idea is to construct a rocket stove with a griddle on top.
I got the vortex thing working, left to implement is a second stage burn with some fresh air that can be injected into the gas, thus making a second burn and achieve higher temperature approx 550 °C (= 1022 °F). Also the chimney on this rocket is either to small or too short (the stove lacks proper draft).