John Munroe

I see. In that case, given that rocket stoves are too "rockety", are there efficient slow burners around that take wood?

John McDoodle wrote:small rockets require almost constant feeding- especially burning twigs. since you said you want to heat water overnight keep that in mind... i would put the coil on the exhaust chimney if i wanted to "avoid boiling"

Oh. Do you know why small rockets require constant feeding (even for a small flame)? Does that mean efficiency is high only when the flame is large?

Thanks

Hi

According to this image, air intake is supposed to flow from below the fuel shelf:



Why is this the case? Air would also flow in from above the shelf - right? In fact, wouldn't most of the air flow in from above since that's where the flame is (shortest distance)? Air would need to take a longer route if it comes in from below the shelf.

Thanks

Glenn Herbert wrote:Probably not, unless the kettle is really big. A rocket stove burns fast and hot, and cannot be damped down to a trickle without destroying its clean-burning characteristics. As the system size gets smaller, it becomes less stable and more subject to friction and surface loss effects; it *might* be possible with a bunch of experimentation to build a very small self-feeding rocket-style stove if you have good draft and do not try to heat a thermal mass. What kind of fuel are you thinking of, and how big is your kettle?

It'll actually likely be a coil-based design like . Would the copper coil become a thermal mass?

I'm thinking of using just twigs as fuel.

Hi

Is it possible to use a rocket stove to produce a small flame, e.g., similar to that by a kerosene lamp? I'm trying to warm a kettle of water to around 50C (without boiling) overnight using a self-feeding mechanism/stove, and it seems that a rocket stove is probably a common one? The flames I've seen on Youtube are fairly large though.

Thanks