stainless steel beer keg suitable for rocket heater/stove bell?

Is a used 40gal beer keg such as https://www.repurposedmaterialsinc.com/metal-barrels/beer-keg-stainless-steel/ suitable for the bell of a rocket stove/heater?
If so is there an existing design to match? {I've only seen mention of 55gal oil barrels that match, and search of permies showed no mention ).
If so, are there any other design perameters to be aware of using this kind of barrel?

That looks like a standard beer keg 56 litres  = about 15 imperial gallons.

Quote=Fox James]That looks like a standard beer keg 56 litres  = about 15 imperial gallons.
Thanks I must've miss-heard "14" as "forty".
Could it work?

The ad says 58.66 liters.

iIt says 56 liters in the ad. So that's less than 1/4 the volume of a 55 gallon barrel, if liters and gallons in the US are the same as UK ones - 4.54L to the gallon.
It's hard to imagine how you'll fit a riser for a rocket heater inside that unless you're going for a really tiny one with no mass.

Disclaimer - I want to built a rocket mass heater in my cottage, so have been reading up on it, but my real hand-on experience is zero!

Thanks Jane, same here. My biggest issue is the 'mass' or overall size, but my heating needs are minimal and for a short season (and seeming to get shorter each year!) I may even be able to get by with solar gain and a trombe wall, but a 'small', efficient fuel heater of some kind would be handy.

Steven Lindsay wrote:Thanks Jane, same here. My biggest issue is the 'mass' or overall size, but my heating needs are minimal and for a short season (and seeming to get shorter each year!) I may even be able to get by with solar gain and a trombe wall, but a 'small', efficient fuel heater of some kind would be handy.

For a barrel-less RMH, even for confined space, have you considered building one of Matt Walker's glass top masonry rocket cook stoves? More info. here in case you've not seen his stove designs before, including his all brick RMH design/plans:

https://walkerstoves.com/index.html

I really like the look for those masonry cookstoves - ideal for a small house!

Back when Matt Walker had built the larger all masonry kitchen cook stove, the one constructed with standard size IFB for the core, I asked him about the output as a heater. Seems this was on Donkey's forum. Anyway, Mat mentioned the stove would serve as a heater, having enough extra output to drive a small thermal mass bench or bell. Contact Matt and I'm sure he can give you an idea of how much sq. ft. area the larger cook stove is capable of heating.

Matt's current "tiny" cookstove and heater has a bench bell attached and heats his house. You would have to inquire about his climate and house size.