Going to give this a try out in a few hours.
With this inside
I admit its a bit big, I had this made for a bell tent (yet to buy) and thought I'd try a small fire in the tent. Im planning to make a smaller stove from an ammo box for this lavvu, but with the next meet this weekend, I'll try out this for now.
The Chimney pokes through the arm hole on the side. I loosely clad where it touches the canvas, with aluminium trays (Chinese takeaway) wired on. Around this goes a fire blanket and it all buttons up good and snug.
The origonal exit from the stove was extended with 2 golden syrup tins and a catfood tin. the dims on these ment they fitted perfectly to the exit pipe and each other.
The top one has holes in the bottom to hopefully act as a spark arrester. A spring from a car radiator cap was extended to fit the rim of the tin and attached to the rain/spark lid (old ally cup lid).
I have some nice thick peices of split ash, so I imagine with the intake almost shut and a good bed of embers, should have 3-4 hrs of heat before a re-fuel.
Just hope it all works and I dont melt. I'll post results tomorrow morn.