Wow! Who said you can't teach old dogs new tricks. You have really enlightened me, and no, I did not come in on a load of pumpkins, and although I was born in the dark, it wasn't last night! LOL!

In replying to your original post I really blew it on the question when I asked, "what effect would that have on the Perry Pump with it pumping against a closed exhaust port?" What I intended to ask was, What happens with the pump pumping against a closed valve? It would appear to me that the pump would be what we commonly call, "pumping to a dead head." With no outlet for the pressure from the pump with the valve in the "off" position like when cranking and taxing, won't the possibilities exist for leaks and possible damage to the pump since there is no way to turn the pump on or off??

Just a thought, because I really like your idea and would strongly consider using it rather than on of those expensive smoke systems available.

"Experience is a hard teacher. She gives the test first and the lesson sometime later!"