Here is a
little video on Rocket Powered Ovens.
There re so many advantages when is comes to this kind of oven compared to any other kinds.
It can be build in a short time, and with non toxic materials that lay around in most homesteads. Any person can learn how to build one pretty easily.
It can be put on wheels to be moved around.
The combustion gases never get in contact with the food.
It can heat up to high temps fairly quickly, and this kind of oven only use very little wood to heat up.
Enjoy!