How can I build a inexpensive gas kiln to fire clay outside?

Question:

How can I build a inexpensive gas kiln to fire clay outside?

Best Answer - Chosen by Asker: The easiest way is to find an old electric kiln and strip out the elements. Cut a hole in the lid and insert a stove pipe chimney. Build a square firebox out of fire brick. Leave a port hole for the gas burner on one side and place a baffle brick inside to deflect the flame into a circular path. It will spiral up through the contents. Use a digital thermocouple to take temp or set up several pyrometric cones close to the peep holes do you can check themp