On Nov 25, 9:04 am, "Doug Goncz, CPS"
(OK, it was actually me) (who) wrote:
Three "tin" cans of steel with adhesive and "tin" burned off in an
oven.
....
Cast wax into outer bottom of inner can, inner bottom of second can,
and outer bottom of second can.
Invest wax.
Cast pewter today, aluminum one day.
Mill square "pillar" between inner and second can, with clearance
for...

Peltier Device! (No ****, I think this will work)
....
Yes,

Yes,

James,
The idea is taken from Zen or Sierra stove, and is forced draft like
them, or the Stalag. Having the pewter melt is a Good Thing--it means
there's enough heat flow to generate electricity, and that it's worth
it to recast in aluminum, as suggested by

Lloyd,
who is spot on. It's a proof casting. Pulling was, sprues and gating,
investing, burnout, and casting are hard enough without creating a
serious fire hazard. So far it's all been indoors. A mechanic in
Maryland does engine castings on the side--I'd send it up.

Eric,
It *is* good to be back in here. I don't visit pubs but it's homey
here. When I moved into the condo with Teri, I got depressed and got
help. When I got the Super Shop I got manic and got help. When I moved
to Alexandria I got depressed and got help. It pretty much burned out,
going up and down. I'm pretty level now, but ain't got much momentum,
coming out of depression, pretty calm and focussed but not really into
anything that adds up. Trying to attach to projects. Whole new med
regimen, but very little support for it from the providers. So...I"m
doin' OK!

Zero provides deep drawn aluminum or alloy pots. I've sized a series
of nesting pots with flanges for a later, prototype-level Peltier fire
pot.

You see the advantage? The battery never runs out and the hotter it
gets the hotter it gets, like a ramjet. I am thinking a decently sized
unti could power a cell phone, maybe even a netbook!

All by burning cow chips, pine cones, and standing dead wood!

It should be fun to try, anyway.

I cast wax yesterday and pulled three good reverse castings. They must
be invested, and I must find someone with a self-cleaning oven. That
type has enough temperature range to really melt the pewter evenly.
I'd melt it in a one-cup Pyrex ladle for pouring. I also have the
traditional blacksmith's bullet-casting round steel long handled
ladle, which works with my existing Sierra Stove, the home stove coil,
or that Meeker burner I set up recently. (Goodwill, $3--a screamin'
deal)

Doug