Isaac : I am afraid that Amos And Max are both correct, and that any copy of the u-tube Frankin-stove will itself fail long before it could serve as a forge.
Any attempt to insulate it will only increase the speed with which it fails due to High Temperature Hydrogen attack and Hydrogen embrittlement !
Ernie and Erica Wisner our moderators here at the Rocket and
Wood stoves Forum/ Threads Designed a Rocket mass heater Type cook stove that allowed
for the insertion of metal from the top down into the RMHs Heat Riser and were able to heat iron/ steel to temperatures that permuted 'Working The Metal',
and did so burning hardwood rather than coal.
The important thing to note here is the
Rocket Mass Heater (with or without 'Mass') is only a little bit more complex, but burns much hotter than the
temperatures you can 'tweak' out of the
Rocket Stove !
As they are currently swamped with other projects, I have not heard of any more development on the Cook Stove / Forge
Mostly when a Fellow member responds to a question here they are going to assume that you have a PDF or Hardcover Copy of the 3rd Edition of
"The Book"
Rocket Mass Heaters.
With over 100,000 RMHs built world Wide- this is 'The Book'! Most RMHs have been built from the chapters of this book, and 95% Of all the 1st time
builds (that Worked) include an understanding of the core ideas, often that alone was enough, But! It allowed people to come here to Permies knowing
that we were all using the same words to describe Our RMHs sizes, shapes, materials, and the orientation of its parts, both to each other and to the
whole !
I hope you found this timely and useful. For the Good of the Craft! BIG AL
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