Hi all, The water cooled nozzle got a two hour work out yesterday. I am very pleased with how well it stood up. No engine exhaust or fluid drip was used to cool down the combustion zone. The engine was a Predator 2500watt generator that did not pull very hard on the gasifier, However I still feel a larger engine still would not affect the nozzle. The nozzle is made from a 1"copper pipe enclosed inside a 1 1/2" copper pipe. This annular space is filled with water to carry the heat away. The hot water rises through a pipe and percolates into a resivour. At the bottom of the resivour is a pipe to return the cold water to the nozzle. Here are a few pictures.
Gary from PA
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