If you are running your engine correctly, there will not be enough oxygen in the exhaust to burn the Jet-A. Now if the hose breaks and you pump the Jet-A into the engine compartment with all that cooling air, you WILL have a fire.

Ask John at SmokingAirplanes.com. I know he will sell replacement nozzles. I will ask him tomorrow night if I remember.

I am down for engine rebuild and will be replacing the lines between the firewall and nozzles with the installation of the new exhaust system. Yes I have two nozzles. Much nicer smoke without burning that much more than just one nozzle.

Smoke valve
 

OK, now that my plane is painted, I don't like the excess smoke oil thats accumulating on my freshly painted belly. Does anybody know the type of metering valve to use to adjust the volume of oil going to the nozzle.
Regards

Go to your local auto parts store and buy a needle valve. They work great.

Pics of the home brew!
 

I'm going to build my own smoke tank & would be interested in seeing your pics & material list. I have a 12 volt fuel pump I used with a 650 Holly which should give plenty of flow. AWI already welded a 1/8" tap on my exhaust, was wondering if I need a fitting with a fixed orifice? And what kind of flow rate do you look for?

One gallon per minute.

Phil
Check the beginning of this thread. I posted some links to the tank, etc.
Also, I drilled 3 (#57 drill) holes in the exhaust pipe inside the welding bung.
Maybe you only need 2, hence my need for the needle valve now.
When I fly next to my buddy with a "Smoking Airplanes" 2 nozzle setup, I am making a thicker smoke trail than he is (same oil). His valve is only 1/2 open though. But I'm getting an oily belly.
Good Luck.

P.S. a link to the needle valve.....$15.00

http://www1.mscdirect.com/CGI/NNSRIT...r=4367%50mode=