Enya .19 C/L and other things..........

Bob, I will offer my advice. Of course this is in the event your choosing to run this plane in a control line setup.  When a tank is mounted in a fuse as you picture funny things happen. Seeing that the tank is twice as high as it is wide, the weight of the fuel above the pickup ( head pressure ) is at work. Essentially what you start off with is a very rich run, followed by a screaming lean run due to less head pressure as the tank depletes. I have no idea what your internal piping configuration is within the tank, but if you choose to run the tank in the manner you have you might want to switch your internals to uniflow which you may already have now. The uniflow pipe can be used to adjust for tank height and not the clunk. Why isn't the tank sitting on top of the beams? If the beams are run back into the fuse, a typical 1" high tank with the engine mounted upright generally places your centerline of pickup relatively close with your tank mounted horizontally on top of those beams.

Uniflow can assist with the engine run, but it doesn't adjust your tank height. Low is low and high is high. Seeing that the uniflow pipe is what dictates tank height internally, if it comes uncovered the run will go crazy. It's certainly worth a shot though because I've seen some of the craziest things work and what should work, never work.

                 Plastic tanks have a considerable radius in the corners due to blow molding. It's a good practice to file the back edge of the  clunk on a angle to allow for the pickup to nestle onto the side of the tank for a cleaner shut off and a more positive fuel delivery.It's very important not to obstruct fuel delivery and the pickup when filed  in this configuration can suck itself to the side of the tank.  Fuel doesn't get pinned in the very rear corner as most would think. It actually goes up the side wall of the tank. Using a Dremel, cut a cross hair groove in the end of the pickup so that in no way fuel delivery is obstructed. Unfortunately, when you do grind or file the clunk you significantly reduce the weight of the clunk. This can pose problems unless you have the stock soft pliable tubing that comes with the Sullivan tanks. This is known as mystery tubing. I have never found the actual product they use that comes with the tank itself. I have tubing that's very close.

               Here is a picture of the Sullivan heavy duty clunk. http://www.advantagehobby.com/32926/SULS396/S396-HW-Klunk-Large-Tanks/  I have no idea about this website, I'm just posting the picture. I use these clunks in my plastic tanks due to their shape and also weight. This clunk is 2x the weight of the standard that comes with the tank. These should be offered in all of the tanks, they work and work well.

       I'm in no way suggesting your tank won't work, I'm just saying that I've experienced similar situations and problems due to similar mounting. I would discard your Top Flite props or use them for static display. I've mentioned this over and over on here as they're extremely brittle at this point of their age. Many don't realize how dangerous they can be. My flying buddy knows though. The blade went through his cheek and into his mouth. This wasn't on a high powered model either.

               The Enya assuming it's broken in does well on props from a 8x4-9x4. They don't like to be bogged down and they do like some breathing room as far as needle setting is concerned. Don't offer a lean needle setting on launch due to the above issues I mentioned.  A Enya will overheat and sag very quickly usually locking up if it's not happy. THis can also be a sign of a engine not broken in. The 11/6 is way too much prop. Running the stock muffler on the .19 usually results in overheating .  It won't be happy unless you open up the tail end. If you have the Enya muffler with the flipper on the side, these work far superior and the flipper can be opened and the holes also drilled out slightly to allow for even more breathing. The Enya can be heat soaked very quickly due to the thick iron lining which is why I'm so opposed to using mufflers on them.