Need help to heat my oven via rocket injection through the front door.

First, let me introduce myself, I am Lucas and I am an expat Aussie living in japan. Therefore, my oven is pretty small. Internal dimentions are 40cm wide by 50 cm long. Anyway, I am interested in firing it via rocket technology. But... I don't have enough space under my oven to install a heat riser.

My idea is to build a rocket stove out of brick that will be attached to the front of my oven (below the door) then put a elbow on the top of the flu pipe to kind of like inject the exhaust gases and heat into the oven via a hole in the door. I have searched the internet for similar contraptions, but have not been able to find one. Need help and ideas.

Give it a try as long as it is outside; I cant see much harm.

I dont understand why you need to use a rocket to heat the oven you could heat the oven rather well with a door and an air intake/exhaust. Sorry i should probably just leave this alone