Once the stove exhausts most of it’s hydrogen fuel, the stove will enter it’s Red Giant phase and grow to the size of a small car.
Are they casting Sauron’s rings in that thing? Jeebus.
mmm malleable
That can’t be safe
It’s safe enough, in the Finnish army we occasionally get the tent heater red hot, and as long as nothing flammable touches it or is too close, it’s fine. It will radiate heat quite well when that hot, but won’t be anywhere close to dangerous if you know what you’re doing. In the tent we of course have some water nearby to extinguish the possible flames but still.
You basically need to have it glowing red if you’re to keep the tent warm in -15 °C or lower. - 30°C needs something closely resembling the picture posted.
Here’s an example, unfortunately hosted on Reddit https://www.reddit.com/media?url=https%3A%2F%2Fpreview.redd.it%2Fjiquty6qz7s51.jpg%3Fwidth%3D1080%26crop%3Dsmart%26auto%3Dwebp%26s%3De4b8083400858eccc1786d7b32b94b759b2bc6c2
You make it red hot because you don’t want to crawl constantly back into the tent. And you never, ever want the fire to go out, because of all the shit you’d get for it. Mansikka for life
But it is warm
It will keep you warm for life
As long as you don’t run it more than 10 min then it’s safe.
Warms the whole workshop within ten minutes? More like burns down the whole workshop within ten minutes.
*also warms the neighbours house in ten 5
At least everyone inside will be warm for the rest of their lives
Give a man a fire and he is warm for a day.
Set a man on fire and he is warm for the rest of his life.
GNU Terry Pratchett
I found it! The source of global warming! Contained entirely within some guys shop
Looks quite efficient. See also: rocket stoves, specifically the pocket rocket design. Though the ones with lots of thermal mass probably serve folks better while taking up more space. Various wood gasifier stoves are pretty neat. I’ve got a little one for camping.
In this instance, I’d predict the components of this stove will oxidize away quickly.