Uniflow tank set up options for control line McCoy .35

[Ronald Eshleman]

How do I set up a uniflow tank in a built up fuselage control line plane with a McCoy 35 engine.

[Dennis Nunes]

Ronald,

You might look at the following link: https://stunthanger.com/smf/engine-set-up-tips/st-v60-has-to-be-set-very-rich-then-runs-lean/msg498098/#msg498098
This is what I used for a ST v60 with muffler pressure attached to the uniflow vent. It should work with no muffler pressure if you so choose.

Dennis

[Jim Kraft]

I have flown McCoy 35's and 40's and what always worked best for me was a uniflow vent tank with the unilflow blocked and the standard vent open. In other words a standard tank. But it is always good to have a uniflow tank so you have options. They do lean a little all the way through the flight, but it is very slight and helps when you get to the clover.

[Lyle Spiegel]

please explain why uniflow w/o muffler pressure setup for McCoy would be any different than Fox35 or anyother stunt installation?

[Jim Kraft]

The McCoy's seem to not change rpm much from the beginning of the tank to the end on non uniflow where Foxes always leaned out quite a bit toward the end of the tank. And, the McCoy's seem to richen up on uniflow. I have run them both ways, and the McCoy's seem to run better on a standard tank set up. At least on the planes I have them on which are all profiles. Magicians, and Ringmasters. In a full fuse they may run better uniflow.