[Stoves] re-kindling stoves

[Richard Stanley]

AJ,
 

On Dec 26, 2010, at 4:40 AM, ajheggie at gmail.com wrote:

> On Sunday 26 December 2010 01:00:07 Richard Stanley wrote:
>> Aj,
>> 
>> It looks like you have now come to the same conclusions of several
>> hundred actual users !
> 
> Ah, I hadn't realised it was a loaded question, still it looks like 
> conjecture meets practice.
>>> Its a good thing when the two can meet, ovrlap and exchange...problem is in getting that exchange part to work both ways,eh ?
>> 
>> Really though for real analysis, Rok Oblak <www.rokstoves.org> 
> 
> My browser reports "server not found"
> 
>>>  Its www.rokstoves.com sorry...
>> 
>> I agree to that excess air can well quench the fire  but what is
>> happening in the combustion of the hollow core Bq is a bit different..
>> It is picking up  radiated heat from the  burning core (at its
>> combustion chamber-end) and that has the effect of heating the incoming
>> feed air supply. 
> 
> This radiative feedback is probably important, there were experiments with 
> lots of different shaped holes by the early pyrotechnic rocket pioneers 
> with this hole shape for solid propellants. It's not necessarily only the 
> air that benefits.
> 
> 
>> The combustion zone if untended, tends to creep back 
>> out through the whole briquette. 
> 
> Which is what happens with a tlud stove if you think about it, the 
> difference is the space between the end of the briquette and the 
> pyrolysis front is kept oxygen free. The question is how uniformly does 
> the fire creep back in a horizontal feed.
>>> Thats one for you Rok !

// Richard