More to explore:
Cinder block rocket stove
A Redneck Rocket Stove
cinderblock rocket stove
A Rocket Stove Made From a Five Gallon Metal Bucket - Rocket stoves are great for smokeless outdoor cooking with a minimal amount of fuel - they run on twigs!
Rocket Stove Heating System by engageinlife, via Flickr
Build your own awesome backyard "rocket stove", which cooks food using only twigs and debris for fuel
Hollywood Rocket Stove
And for an oven, I think this image is fantastic: All the details can be found here: weblife.org/...
The Onil Stove. Better than a 3 stone fire for sure! It seems quick and easy to put together.
What is a Rocket Stove? Why Do I Need One? One of THE most practical things you can own or know how to build.
Heavy Duty Rocket Stove
More on Rocket Stoves, DIY preparednessadvic...
I am soo making this for my dutch oven this fall! Finally I now know what to do with all of those bricks I have piled up!
Could be used as idea for boiling down sap- with taps lines running right into the tub! Rocket stove bathtub thewaldeneffect.org
Rocket Stove - you can often heat your house with little as recycled yard trimmings