>>28840 The vermiculite is lose between the inner and outer metal skin. There is a metal panel on the top to stop it falling out, and the trivet (griddle bar) is attached to that panel. The bottom of the bucket is still there but there is vermiculite board in the bottom which is why it looks like the concrete floor.
The idea of this type of stove is to be very efficient by retaining heat in the combustion area, hence the vermiculite insulation, to allow gasification of the wood to occur which creates a very hot and very clean burn.

>>28843 Sadly it doesn't sound like a V2, but one day I will build a pulse jet that is very load :D As mentioned above it is very efficient, but that does rely on you having some good dry wood to get it going.

https://www.youtube.com/watch?v=EEHw9lInIfg

But does it sound like a V2? if not, that must be your goal! Awesome thing btw, how efficient is it then?

So, some questions come up:
I see the teapot support (griddle bar) is stuck in the vermiculite. Have you somehow made the granules into a solid maybe by melting it?
How did you keep the vermiculite contained from falling out the bottom?
Great idea and stove, by the way.
Such a small amount of twigs to produce such a large flame.

and you can roast marshmallows!

>>28831 It took 6 minutes and 30 seconds to boil 1.5 litres of water. Almost as quick as an electric kettle.

A very exciting photo of the inside before the vermiculite insulation is added :)

it won't get you to the moon, but you'll have a mean cup of tea in about 5 minutes!