Thanks for all the replies guys Helps me alot!

I have the smoke system installed in my Carf Mig-15, and there is really no optimum place to put the smoke oil tank(s). I mounted one 400ml tank on each side of the turbine, so I have a total of 800ml. Not a lot, but enough for some "smokin´" flybys[8D] The pump should probably been mounted underneath the intake ducting, but it is hard to get down there without lots of work... The pump is therefor mounted on top of the intake duct, which after inputs here, and some high level thinking(....) from this guy, is an unfavorable position.

I have ordered both check valves and one way valves (2 of each), and will fit them and see if the 'siphoning' stops. If not, I might change the pump´s location.


Kim