I thought this video:
was really interesting, because the guy got a pyrex dish from the dollar store, heated it up over a fire to make sure it could take the heat, and used that to form the front part of the burn tube of his RMH! Now he not only has a butt-warmer, but one that will give that nice cheery flame effect like a regular fireplace!
Do you think the guy's a raving loony for trying something like this?
Not sure this is a good idea. Can't find the reference but there was a significant discussion on using pyrex in a wood stove forum and it was found to thermal fracture quickly compared to the correct glass.
Muzhik wrote:What is the "correct glass"?
In my experience the correct glass is usually called Pyroceram III. It is treated to withstand thermal stress up to 1650 Fahrenheit. Robax or Neoceram are other brand names. Though similar to Pyrex they have been treated to withstand higher temperatures.