I use a (tamjet) smoke pump, and get good smoke. So far so good

What I do not like is the "leaking" of smoke oil when the pump is off. Intermittently I get small trails of smoke during taxi and after shutdown.

So my question is; is my setup/plumbing sub-optimal, or is this something I have to live with? It seems the heat/airflow from the turbine forces small amounts of smoke oil out of the tube ends/nozzles.



One other thing, I believe I red somewhere that turning on smoke while the engine is at idle is a bad idea (for the turbine). If so, does that apply for both on ground and airborne?



Thanks for any reply



Kim