[Stoves] Improved 3-stone stoves

[K McLean]

I can tell you that some air circulation in the fuel seems necessary.  Fine
sawdust will not burn.

On Wed, Jun 22, 2022, 12:13 PM K McLean <kmclean56 at gmail.com> wrote:

> Dear Graham,
>
> The best I can do is tell you the cooking hole works.  Smarter people can
> tell you why
>
> The cooking hole was something of an accidental discovery.  We were
> working with the top down burn of crop waste, which works wonderfully.
>
> I wanted to try the top down burn in a three stone cookstove but there is
> little room under the cookpot.  So we dug a hole for the fuel.  I was not
> optimistic but it worked - very well.
>
> Kevin
>
> On Wed, Jun 22, 2022, 11:53 AM Graham Knight <biodesigndiy at gmail.com>
> wrote:
>
>> Dear Stovers,
>>
>> I am much puzzled by the correspondence concerning digging a hole, etc.
>> under a 3-stone stove!!
>> If you put fuel into a hole it will certainly burn more slowly with the
>> restricted combustion air.
>> It will therefore give less heat per minute to the cooking pot.
>> How long for the pot to come to the boil, if ever?
>>
>> Graham Knight
>> biodesign20.co.uk
>>
>>
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