Ever built a rocket stove?

[randyt]

I've been thinking about a rocket mass heater for boiling maple sap.

[Lupa]

I've been trying to make one, and with the can setup I realized mine failed because there wasn't enough airflow for the flame to actually get very high. My brain is struggling to understand these things - I realize I need the whys and wherefores before I can really grasp the process.

[birdman6660]

im building a rocket mass heater .. same basic concept .. plans and pix at richsoil.com a few videos too .. they work great and yes get " freaky " hot heat your abode with very little wood as the stove stores heat very efficiently ... YES the summer is over and Im off work and able to get back on here wooo hoooo ! ! !