Bodywork, birthday and a visit from the stork.

The working hours were very much limited because of birthdays and arrival of a new person. The Finnish midsummer had to be observed too so the work on the oven took a halt. When all the auspicious occasion had passed and when we finally got back to work. We decided we also need to work on the weekends when possible to catch up on the work we slacked on. We then started debating among ourselves on how should we proceed further. We still had no solid clue on how were we actually building the body of the oven. 

Visualize it

 

Yay! Power tools! (Cutting open the oven was tense.
If we calculated the angle wrong, it's going to be a bad day..)

A bit of the oven frame

We cut the oven at an angle and we decided the convection chamber would be long and made out of plywood. We’d have to insulate the oven, especially the convection chamber. We did get some new insulating material, rock wool, which would stand up to 700°C thanks to Kevin’s father-in-law, Erkki,  who was quite a savior in time of material shortages and design issues. We certainly made use of his knowledge of carpentry.

We also got some sauna foil which we decided would insulate the convection chamber and also act as  a reflective surface. We also got very good used mirrors which we decided to use to concentrate the sunlight into the chamber thanks to Erkki. We decided to build a frame around the oven and use the frame to attach the convection chamber and also use the gap between the frame and oven as the insulating zone. We will insert the rock wools there and  cover it up with plywood. 

The convection chamber itself was built with plywood held together with some angle brackets. Then we saw the gap between the plywood boards. The gap cannot be seen but it is there and that will radiate all the heat out. We then decided we would build another chamber outside it and fill the gap between those two chambers more insulating materials.