Julien,
Your fast-packed straw reminds me to the typical saw-dust stoves, which
were dense-packed/ stamped with a central hole, -- which was formed by
inserting a stick during packing, and drawn out before burning-.
I saw that short after WW II, when the drums (with bottom-hole, to fit the
"loading-stick" and totally open on top) were filled with saw-dust. One of
those drums was inserted into the stove-body, and lit from bottom.
At the backside of the stove, there were two flue-outlets, one near the top,
and one (as I remember right) at the middle, or possibly lower.
When the stove was burning well, the upper flue-pipe outlet was closed. So
there was a burning-gas circulation at the outside of the loaded drum.
Take care! If you make experiments with such types of stoves, there was
sometimes a puff caused by sudden ignition of unburnt smoke, with the result
that the top-lit flew away.
Some years ago the daughter of A.D. Karve has developed a saw-dust-stove, which
is close to the working-mode of the ancient model I saw.
I can imagine that the stove from India possibly has had already test-runs with
pressed straw.
Happy stoving, without puffs!
Martin
P.S. Sorry this mail mail went yesterday to the stoves request address
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