JOY stove keep me warm!

short barrel (lifts off) with hole in top covers feet tube when not in use
 or after fire burning well.   can increase down draft

Rocket Stove
let's call it a J stove.  J for JOY.
Short vertical stove pipe (wood feed tube) leads to horizontal burn tunnel,
leads to vertical stove pipe / heat riser (taller than feed tube).
tall vertical covered by metal barrel, leaving reasonable space at top, hot air tumbles
over edge of pipe, down inside barrel and travels through horizontal stove pipe,
encased in cob / mud / earth plaster bench
 - clean outs at each turn of pipe -

We lit the JOY stove at the Strawbale Studio this week.  It is in a building called the
'Red Shed' where we spent time constructing the SOLAR DEHYDRATOR.   We
 learned the specific techniques used for successfully lighting a rocket stove.  Burning a little paper
 in the 'primer space' encourages hot air to rise up chimney (exits thru ceiling in this design).
Burn a little paper in horizontal burn tunnel, then vertical placement of tall, matchstick size
material inside feed tube at mouth of burn tunnel.  Continuing to place vertically,
 increasingly larger pieces of wood in feed tube.    Fire does not burn up (it burns down),  due to
significant down draft created by stove's J shape and careful placement of wood (smoke does
not come out into room).
Barrel covering heat riser became very warm within minutes.  Exit stove pipe became
warm, and remained at low temperature allowing one to place hand directly on metal and
enjoy warming effect for extended periods.  Heat absorbed into earthen bench became evident to the touch following about one hour, providing a cozy place to sit (or sleep).
potential benefits of JOY stove -
 bench adds much thermal mass, increasing efficiency
top of barrel provides cooking / water heating surface
stove burns less wood than wood fire cook stove
cooler exit temperature allows for possible side wall exit of 'chimney'
harness this heat for green house, animal shelter (warm chickens), livestock water
it is beautiful!

interning at the Straw Bale Studio January 2013
strawbalestudio.org
rocketstoves.com