dave marth wrote:Is this too easy and obvious to be true?
Fraid so.
In a nutshell, a properly-functioning rocket stove produces temperatures high enough to destroy your metal parts in a fairly short time.
So for your application, you'd either:
1. Build a rocket stove that
doesn't work very well, so as not to damage the metal components
or
2. Build a rocket stove right and
have it destroy itself.
Neither one is a great option.