Karangi Dude's Mobile Oven

[cobblerdave]

G'day
sinks and waste water tanks and fresh water tanks certainly complicate things. But it has to cover all the health aspects I suppose
regards dave

[Karangi Dude]

Whilst waiting on the fabricating to be finished I started working on an insulated door. Way back before the oven was assembled I traced the inside of the door arch onto a piece of ply so that later I would have a template to use to make the door (if it was a brick oven then I would use the door form as a template)
I traced the template onto two 3mm steel plates to make a sandwich with 50mm fibre board of insulation I then cut a strip to go around the outside and welded the seems together
I then added the handles and a couple of pad bolts (to hold the door in place while traveling) It was now ready to be sand blasted and painted with high temp paint

[Karangi Dude]

To partition off the kitchen sink area we used the same material as the external cladding but in 2 sided white, then there was a folded stainless sheet used to set the sinks in.
We then drilled holes in the floor for the waste water plumbing to the grey water tank

[Karangi Dude]

Thanks Steady,

Hanging the doors and fitting the external cladding was quite a job, we still had to do the kitchen / sink area the local councils requirements were pretty extensive

[Steady]

I can see why everyone is happy that you are back - loving this build Karangi Dude

[Karangi Dude]

Thanks Deejayoh and Fox,

Deejayoh, there seems to be a lot of steel but it is light gauge and the cross braces are only there to get it all nice and square, as you will see later there are 4 doors to go on so that does not leave a lot of solid area

Once the the frame was finished it was time to go to the paint shop, all the internal area was painted white and the external area was painted black including the underside of the trailer where we installed a metal stone guard to protect the 2 x 115litre water tanks (one for fresh water and one for grey water)
Then it was back into the the factory for the external cladding and hanging the doors

[fox]

Very interesting build, thanks for posting.

[deejayoh]

Wow, that is a lot of steel! I don't think you are in any danger of that blowing away on the highway. All looking very good, following with interest.

Welcome back, btw!

[Karangi Dude]

Next it was back to the trailer manufacturer to build the enclosure
But first some brainstorming and careful planning was needed before I came up with the design I wanted
There are so many things that needed to be considered, like how high should the roof be, how many doors and how big they should be
I also wanted the roof to slope so that the rain would run away from the side I was operating the oven from
I also needed an area under the trailer for a couple of water tanks one for fresh water and one for grey water

[Karangi Dude]

I was ready to paint the oven
First a coat of BondCrete to seal the render and to act as a key coat for the undercoat
After the undercoat 2 coats of topcoat

[Karangi Dude]

I removed the cardboard spacer and placed the flue on temporarily so I could cure the oven
I started the curing by using Heat Beads (BBQ Briquettes) for several hours before lighting the first fires
After several fires it was time to get the oven up to pizza temp (of coarse cook a couple of pizzas)
I checked the hole that I had left for any steam to escape by placing a piece of clear plastic over the hole, there was no more condensation to be seen on the plastic so it was ready to be sealed up. I topped it up with some vermicrete and finished it of with some render ready to paint

[Karangi Dude]

Before I started the render coat I made a cardboard spacer to fit around the upstand to leave a clearance for the flue pipe to slide on

Then it was time to render the oven still leaving a hole to vent the moisture when curing the oven (this hole will be filled in later before painting)
The vermicrete layer was not quite the required shape the final shape was made with the render coat

[Karangi Dude]

The flue exit needed some grinding to open up the throat and make a more smooth passage for the flue gasses to exit the flue
After grinding the top of the flue vent I bolted on the upstand ready to take the flue

The flue that came with the oven was to short and only a single skin, I designed and had a flue made by The Flue Factory in Melbourne
It was the right length with a double skin and a heavier upstand also has a wind cowl to prevent smoke being blown down the flue on windy days

[Karangi Dude]

To get that nice round shape I covered the insulation layer with a layer of Vermicrtete
l left a small hole in the top (an empty beer can did the job) to release any steam that may build up during the curing process

Whilst waiting on the vermiculite to dry I set the granite landing into the entry (I had the granite made to order)

[Karangi Dude]

With the decorative arch now finished it was time for the insulation, 2 layers of 50mm fibre blanket and some 3mm straps to hold the whole thing down, I then placed mesh and tie wires over the blanket ready for vermiculite layer.