[Little Aussie Rockets] starts off the build by fabricating ... and improve its efficiency. The rocket stove was able to effortlessly heat 80 liters of water to 70°C in a little over an hour ...

It’s a great way to send a water rocket ever higher, but [The Q] didn’t stop there. The build was also fitted with a wind-up module from a little walking toy, colloquially referred to as a ...