Hi all. First posting so I'll start by saying yes I already have Iantos book and yes I have the DVDs (just need to get around to watching all of them). And this forum seems pretty active so I'm hoping for a bit of help
My goal is to build my Mum a rocket stove powered pizza oven before Christmas as a thank you for helping me finish my 6 year degree.
So far the design is a bit rough in my head, but the idea was to run a J tube rocket stove into the bottom of a cut down 55 gallon drum to act as the oven. Insulate the hell out of the chimney and the oven, make it look pretty, and I'm hoping it will get hot enough to cook a pizza - please tell me it's going to work??? I still have a few doubts. And a few questions I could use some advice about.
So, regarding a rocket stove chimney. Does the requirement for the cross sectional area being constant the whole way through apply like in a RMH? Only I have a piece of flue left over from replacing the inside chimney that's about the right height, but it goes from 6inch to 4inch diameter that would be convienient to use. It burned alright when I set a test fire in the mock up J tube, but I want to get it going as hot as possible.
Is cement a good insulator? Again there are a few bags in the shed that could do with using up, and was thinking I could use it up around the chimney and as a base to support the oven.
Better to have a chimney out of the top of the oven or use the door as an exit for gases like a regular cob oven? Was thinking a chimney on top would create more of a draw through the oven which would be beneficial to the rocket? Was planning to put a diffuser plate of some sort on the rocket chimney entrance and chimney exit as well.
That's all for now I think... Thank you kindly
This picture was my first trial run of a J tube using the things I had on hand. The stone on top got too hot to touch. Theory proved to mum, so i got the go ahead to play some more