Rocket Wood Stove made from a can, some soup cans, and vermiculite or sand for insulation. Could be cool for camping.
Homemade TIN CAN Rocket Stove - DIY Rocket Stove - Awesome Stove! - EASY… I like this one but would probably marry this one with the other one and make a few adjustments.
The Block” Rocket Stove! – Do it yourself Rocket Stove – (Concrete/Cinder Block Rocket Stove) – Simple Do it yourself How to make a “Four BLOCK” Rocket Stove! Four concrete blocks is all it can take to make it!
HITTE - Rocket stove met bankie in middel v huis
If you can stack bricks, you can make an effective biomass rocket stove. The materials are cheap, and readily available. Most important, it is a very simple survival skill to learn.