A simple liquid fueled rocket engine that runs on hydrochloric acid and sodium carbonate solution. It doesn't get much thrust but it does work in a similar way as a shuttle engine. I built it so I can get a feel for the workings of an engine before I build one that uses liquid oxygen and kerosene. Same rocket in a different position: https://www.youtube.com/watch?v=BRpI_TyUhmM Fuel for my next rocket: https://www.youtube.com/watch?v=NcaF2hwuwvw