[Stoves] DIY camping TLUD with walnut shell fuel

[Mangolazi]

Thanks everyone for the tips. I think I'll try reducing primary air and I'll add a small flame disc or fan, like on kgharris' designs. If I use a riser, wouldn't that make the flame under the pot cooler, thus reducing heat transfer? 

I've attached a drawing of my current camping tin can TLUD. It looks like it creates a pilot flame at the secondary inlets, similar to a kgharris drawing I've seen somewhere. I get a star-shaped flame pattern from above, individual tubes of flame flowing inward from the secondary inlets and joining up to create a large diffusion flame in the center. 

On June 14, 2016 4:52:30 AM GMT+08:00, Ray Menke <ray.menke at gmail.com> wrote:
>On Mon, Jun 13, 2016 at 4:28 AM, Mangolazi <mangolazi at yahoo.com> wrote:
>> How can I prevent the flame from going up so high?
>
>Try making another fuel container with smaller or fewer primary air
>holes for the walnut shell fuel.  One method I use is to mix some
>saved dry char (coals) in with the fuel to reduce the height of the
>flame.  You could also layer fuel into the stove when you load it,
>putting first a bit of char, then some thicker fuel, and then the
>walnut shells on top.  In place of the screen in your stove photos, I
>have an insulated riser 7 inches or 18 cm high, so the bottom of the
>pot is higher above the flame.  This riser is actually a juice can
>wrapped in ceramic wool insulation covered with aluminum foil.  The
>juice can does not last very long, but I have a good supply (free).
>The primary air holes in my stove's grate kept getting smaller and
>smaller over several years of experimentation, and now I use a little
>computer fan to force more air through the holes at the beginning and
>end of the burn.  My aim was to have the top of the flame just barely
>touch the bottom of the pot.
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