[Stoves] Magh Smoke Burner Stove

[Saibhaskar Nakka]

Dear Chris Smith,

The primary air enters the combustion chamber from the holes made at the
bottom about 25 nos of 2-3 mm diameter. Overall secondary air supply is five
to six times more than the primary air. I have not seen any real working
T-LUD stove models, except some photographs and video clippings of Dr.
Reed's stove. Therefore I am not able to imagine other components of the
stove. Regarding the fan, I used 12 volt computer fan of 2500 rpm. Because
this is universal and available in every country and the cost is very less
<1$ (USD). Moreover as these fans are especially made for cooling the
computer (CPU) the plastic is hard and resists heat (I am not sure how much
temperature it with stands). In this stove design we are using the fan for
pumping air into the chamber, and as the fan is located outside the chamber,
it is more safer. Although I cooked on this stove for about 50 times nothing
happened to the fan. Yes a fan guard is necessary and I will put one soon.
Regarding metal fans I have not explored yet, the cost and the voltage, etc.
If any one is aware of low voltage and cheaper fans, i would like to know.
The design is so simple, and I think many of you could easily make one
(already Mr. Roger from Netherlands is making it and I am guiding him). If
needed in small quantities, I have to plan.

Dr. N. Sai Bhaskar Reddy


Risking errant observations, suggesions or inane questions from the peanut
> gallery (myself), I'll procede:
>
> I was wondering how the primary air of your Magh Smoke Burner Stove enters
> the combustion chamber - from drilled dimension restricted hole sizing in
> the bottom of the burn chamber?  Unless I am mistaken, they are not
> visible
> in the blog photos.  Do you have an estimate of the ratio of primary to
> seconday airflow?  I've also noticed apparently absent is a fan shroud for
> further limiting primary air and providing some fan heat shielding, or
> insulation such as a metallic reflective insulation layer - both of which
> I've seen on Dr. Reed's Woodgas Campstove (used for comparison).
>
> Possibly it may be cheaper and more durable and heat tolerant, rather than
>
> using a 12V computer fan to substitute a lower voltage electric motor
> attached to a fabricated sheet metal fan blade (cut and bent from a single
> round of metal sheet) bolted or screwed on to the motor's armature with a
> sleeve connector.  A fan guard or a interrupter contact may be desirable
> to
> prevent fan damage to little fingers from top-off fan operation if a
> metal-bladed fan is implemented.  Bottom of stove fan mount orientation
> may
> facilitate channeling directed airflow upward and use of a lower voltage
> fan.  Melting of plastic computer fan blades hasn't been an issue?  Less
> or
> cheaper batteries to service lower voltage fan motors should be helpful
> lowering price, both for manufacture and for the stove user.
>
> Quite an achievement!  Will you anticipate being able to make this stove
> or
> a future rendition available for export (singley or in small quantities)?
> I'm sure list members would want them.
>
> Thank you for reading and answering any of my questions,
>
> Chris Smith
>