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Couple of simple questions re Rocket heater

 
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I built a prototype small stove with well insulated burn chamber, that burnt very efficiently, and used it for heating water quite effectively. I have never seen one with a riser.

In practice, what sort of temperatire can you expect on the surface of the Oildrum (riser)?

When I built a prototype, it burned at a very high temperature, but it went through wood pretty quick I thnk a bigger one would eat wood pretty quick. Is the idea you don't keep them burning all the time or is there a way to slow burn??

 
Mother Tree
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With a rocket mass heater, the idea is that you run pipes through a 'mass' which extracts all the heat and acts as a thermal battery, which gives off heat into the room for many hours. You never slow burn a rocket mass heater, you burn as fast as thoroughly as possible, but only for a short time. I think most people only burn them for an hour a day, but the mass keeps giving heat off for 24 hours.
 
Dave Quinn
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Any body anidea what temperature the riser (oildrum) gets to?
 
gardener
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From one of Ernie and Erica's plans:

Working temperatures:
Flame path: 1200­-2800 F
Barrel surface: 200-­800F
Masonry surfaces: 60­-90 F
 
Dave Quinn
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Thanks I didn't realise the barrel surface got so hot, I'd think thats hotter than a wood stove.

Need to re-think my ideas (in a positive way).

Bill Kerans wrote:From one of Ernie and Erica's plans:

Working temperatures:
Flame path: 1200­-2800 F
Barrel surface: 200-­800F
Masonry surfaces: 60­-90 F

 
Ben Plummer
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Yeah, I think I remember a post by Ernie saying he sometimes runs it even hotter than that to experiment. All the pyros around here make me happy.
 
My honeysuckle is blooming this year! Now to fertilize this tiny ad:
Heat your home with the twigs that naturally fall of the trees in your yard
http://woodheat.net
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