Airtech, in answer to your question about tubing, Sullivans instructions say to use neoprene because of "its resistance to heat". Makes sense since most auto installations use neoprene all around the engine.
Vanguard,
Appreciate your information on the use of neoprene for the smoke system. I have found it very difficult to obtain Nitrile tubing so I need to use an alternative. Are you using the neoprene for the connection to the muffler? I used Tygon ounce on a two stroke .91 for the smoke line muffler connection and it kept on melting, and gas engines run much hotter than glow.
Do you use an additional flow regulator ( i.e. needle valve ) with the Sullivan system? Or does the Sullivan Sky Writer can be finely programmed through the radio to regulate flow? I have found out that when the pumps are driven at 100% one needs to make small flow adjustments so there is no wasted fluid. The TME system comes with a cheap line pinch screw to regulate flow which is almost worthless. A [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXDG58&P=7]Perry Remote Needle Valve [/link] assembly provides very precise flow control, and much longer run times on the smoker. I was able to get over six minute runs out of a 10oz tank, and that was using a non-programmable flow pump.