2831Re: off topic -- diy wood burning backpacking stove
- Sep 10, 2003--- In firstname.lastname@example.org, Matthew Takeda <takeda@s...> >
>>> Don't give up. I'm trying to do the same thing, although Ihaven't set a target weight. I figure I need to get the design
working first, then lighten it.
Thanks for the encouragement. I have two things in mind for this
project, the small lightweight burner which I will then scale up to a
patio burner. The larger burners are easier because the draft is so
> Tom Reed's Biomass Energy Foundation just started selling theirsmall gasifier "campstove" about a month ago. It uses forced
convection from a fan powered by a single AA battery and is fairly
impressive, but it weighs in at 30 ounces.
For those that haven't seen this yet, there are some pictures and
some explanation here: http://www.woodgasllc.com
> Natural convection should work fine once it gets going. What areyou using as a firestarter?
I am using a miniature candle, which is a 1/2" wick on a square of
cardboard (about 1/2" x 1/2") with about 25 drops of parafin.
> Do you route the intake air to preheat it?In my current attempts the intake air is coming in under the fire box
and is forced through a 1.25" diameter opening in the bottom of the
firebox, where there is a wire screen to disperse the air and allow
the ash to drop through. This creates a very hot, but small fire
just above the hole. I will be refining this over the next week, and
expect to end up with separate controls for primary & secondary
airflow. One of the design goals is that this must be easy and fun
to start which is the current weakness.
>until it gets going.
>an add on chimney to increase draft, or a tube you blow through
Yes, right now I'm doing both of these. The add on chimney is the
most satisfying; but the complexity/bulk of possibly telescoping
tubes is weighing against this as a solution. On the other hand,
there will be a windscreen involved, so perhaps that could be made to
do double duty.
>Thanks for your comments Matthew!
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