[Stoves] The Hybrid Stove Two

[Lanny Henson]

Hybrid Stove Two

See: http://www.bioenergylists.org/en/hensonhybridtwo 

YouTube Video  http://www.youtube.com/watch?v=6_7eRdIv_oU 

My new stove the Hybrid Two has three phases. It cooks with wood and then 
switch to burn the charcoal produced by the wood and then shuts down to 
retain heat.

Instead of removing a center section like the first prototype, this stove 
telescopes, to switch from wood to the charcoal phase.

In the process the pot moves closer to the burner and a sleeve blocks excess

airflow so that all the air is forced through the bottom of the burner, to 
burn the charcoal.

The stove system is made entirely from 4 pails and two cans.

There is a wind band and a top cap for the heat retaining mode.

In one test 500 grams of pallet oak cooked 4lb or 1.81 kilograms of dried 
pinto beans.

After the beans were soaked, and enough water was added to cook there was 
about 7 liters of volume and a little more than 7 kilograms of weight.

The wood burning phase brought the beans to a boil and continued cook about 
15 to 20 min.

Then the charcoal phase simmered the pintos for about 30 to 45 min.

Then the heat retaining mode held the temp just below boiling for the second

hour.

In the third hour the temp dropped to 85c/185f and down to 80c/175f. AT 3 
hours the beans were soft and done.

There was no visible smoke after the wax burned off.

This is my second prototype and I am pleased with many of the elements of 
this design but it needs to be more user friendly.

For my next stove design I will keep the best elements of the Hybrid Stove 
but focus more on ease of use and simplicity of construction while trying to

maintain efficiency. It may use a few more grams of fuel but I am thinking 
that the ease of use will out weigh that loss.

After all the cook has to like a stove, for a stove to be practical.