[Stoves] Burning saw dust in TLUD stove

[Crispin Pemberton-Pigott]

Dear Paul

I think this is a chance to try a new burn method as follows: light the
stove as if intending to start in the regular manner. Then switch to a
WorldStove-like configuration with the fire on the outside of a cylinder's
side instead of at the top of a cylinder, using a chimney to pull the gases
through instead of a fan to push.

I have been giving this layout some thought and it seems to me it overcomes
a couple of problems that are otherwise difficult to deal with, one being it
is hard to push a rope.

If the whole system was pulled rather than pushed, you could get and
maintain a burn against the outer wall (a-la-WS) and turn it into a
self-heating retort instead of a descending front. In addition, at the end,
you would be able to refuel it which is a huge advantage.

I presume you have tried a chimney instead of a fan, yes? John Davies has a
nice layout for getting a pot in there, something like the early Vesto Coal
stove in a can with an exposed pot bottom sealing the air and an offset
chimney coming out the side.

Do you know what the air pressure is in the fan-assisted models?

Thanks
Crispin

+++++

But for saw dust, the tendency is to create channels because the air seeks a
path of least resistance. Once a channel is open, the pyrolysis front is not
flat, but actually is radial sideways from the
channel(s) of the air.  The key is to avoid the creating of air channels.
Easier said than done.