About water cooled nozzles, l used them on my Seats first gasifier. If anyone is interasted the pictures are in the begining of the “charcoal powered Seat Arosa 1.0” thread.
The nozzles worked well, but the gasifier was a crossdraft so the gas was way to hot for a in the cabbin gasifier. Thats the reason l started to develop my thick steel pipe nozzle.
Bob, you mentioned a bigger pipe to hold water. Your thinking is spot on
Myne was a 4" dia with 0.5" wall. The big size did alow plenty of water to boil in the nozzle pipe, cooling it and provideing water Without water pouring in the nozzles at tilts or brakeing. The system ran great.
But why did l abandon this? The reason is idleing. When you stop from a drive, the nozzle pipe still has enough heat to boil that pool of water, killing the charbed.
A great idea for a generator, not for a car.