I'm looking for references to this topic either as they relate to the Rocket Stove concept, or similar references to rectangular flame pathways used in other types of stoves, or heaters. If anyone had links to share on this topic I'd sure appreciate it.
As posted in a previous thread, I plan to build a Massless Rocket Heater with rectangular flame pathways, but I don't want to repeat other peoples mistakes. I did find the following reference on gassification that which used a 9cm X 12cm flame path which sounds promising:
http://stoves.bioenergylists.org/aprogasrocket
A Google search also turned up a thread on permies from 2010, but the outcome of that persons intention to use a rectangular heat riser was never commented on.
I have at least a month before it warms up here enough to work outside, so if anyone encounters further references I'll watch this thread for your posts.
Thanks!
Keith.