I love em they are fantastic!!

I think rocket stove is the american name for them though I could be wrong. Ive always known them to be called norwegian stoves or just mass ovens.

What do you want to know? Ive built a couple of them, mainly out of earth and fire bricks

I've just started looking in to this and have come across a guy Bert Bruins who used to build them for other people.
He's going to advise me via email initially and maybe visit for a "workshop" on site when we've got the design sorted.
Also waiting to hear back from "Nordpeis" who make these (listed on "stovesonline") to see if they will supply just their door, or door+firebox, in order for me to build the rest around it.

There are various ways of running the channels through the masonary, some of which seem to need more in the way of access for cleaning ... and smart design to avoid gas pockets (using channel to channel vent holes)
Broadly speaking these are variations on going for either long vertical channels, or lots of short horizontal channels, or a combination ... Preferences anyone?
Would a spiral combine the benefits of both??

Our (single storey) layout is as on the first pic.
Each angled off corner once had a fireplace, and the two double-stacks remain.
The dimensions of what we have to work with for the mass stove in the second pic (posted separately)
The idea is to take down the front wall of the living room fireplace (pink) and "fill-in" behind.
There would be double the space/mass available if we can link to the adjacent space (between green & blue) ......

Try looking up 'Kachel ofen' (spelling?) - these are the German/east European equivalent I believe. Thermal mass stoves, with serious mass.

I always thought rocket stoves and masonry stoves were two distinct technologies.

We stayed in a holiday cottage a few years ago with what I thought was a "rocket stove", made from an old gas cylinder (see below). Worked pretty well, and had a certain quirky appeal!

Posted By: renewablejohnI always thought rocket stoves and masonry stoves were two distinct technologies.

They are - unless the rocket stove is made out of brick, then pretty much the same - a solid fuel storage heater

Posted By: Phil.Chaddah-DukeThese are cool, never seen them before. Oh well something else added to the To Do list, wondering if I could make one heat our Thermal Store

Both rocket stoves and masonry stoves are essentially space heaters, which can be fitted with wet heat exchangers at the building stage. The heat exchange coils are usually used to feed a couple (or 3 or 4) rads that are remote from the stove. IMO not really suitable for heating a TS as the ratio of heat to water and heat to air is very much biased towards the air. In any case the masonry stove or rocket stove built of brick is a dry TS (albeit with an uncontrollable output once firing has finished) so would you want to transfer heat from one TS to another. If a metal rocket stove was heating the TS I don't think I would want to be in the same room as again the heat output would be very much biased to the air rather than the water.