"nametab" wrote:

How much volume are you trying to push through there. We are up to almost
1gal/minute and getting fair smoke, but with the rotor downwash, it defuses

The volumn of smoke oil you can pump through depends upon the
volume of your exhaust gas. A bigger engine, or running at a
higher RPM (or both) will usefully allow a higher smoke oil
volume.

For a big piston engine (eg 540 cubic inches) 1 gal/min should
give very good smoke, with the right smoke oil. Check the
flashpoint of your oil - betcha it's up around 400F. You'll
get better smoke with a (CoC) flashpoint of 250F.

As far as dealing with rotor downwash, you're on your own! I
don't know nothin' 'bout fling wing :-)

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ATP http://www.pittspecials.com/images/oz_down.jpg