I hate to sound like a dunce, but what if the inboard engine dies? Does the outboard one try to pull it into the circle on you? Do you have a shut off for both engines?
I've read all the posts up to this one I'm posting right now. I really appreciate all the great replys you guys have posted and your encouragement. Thankyou. Thankyou very much.
Dave I chose your reply to quote and respond to directly because your question is one that worried me for the whole year and a half that I was building this model. The question is---what if the inboard engine dies?
If the inboard engine dies the plane slows down. Period. It will still fly and hold line tension. I've flown this model 8 times now in two different flying sessions. The inboard engine quits prematurely every time. And the plane slows to 6.04 second laps instead of 5.01 second laps. There is never a time when controlling it is unmamagable.
After the first flying session I took the engine and tank out of the inboard nacelle. I checked torque on the backplate and head bolts and flushed out the spray bar. All was well. When I shook the fuel tank something rattled inside. I opened it up and found a solder pellet that was too big to pass through the pick up tube but just the right size to starve the fuel supply. I took it out and capped up the tank and dunk tested it. Again all was well.
I took the Heat out to the club field and felt certain that the problem was solved. It wasn't. The engine ran further into the run but still quit prematurely. It's really hard to tell what each engine is doing when they're both running, but I did notice that the problem engine (inboard) was pulsing as if the tank was pressurizing and decompressing. I changed the tanks over from muffler pressure to straight suction. The inboard engine ran nearly the whole run, but off and on it would still pulse. I tried the next flight at 10 grand and everything stayed the same. The inboard engine still pooped out. I tried it at 1011 grand on the next flight and got the same results. I rolled up the lines.
Next thing I'll do is move the inboard engine to the out side and the out board engine to the inside. If the problem follows the engine I'll concentrate on the engine. If the problem stays on the inboard side I'll concentrate on the fuel tank.
Either way I feel like I'm getting my moneys worth.
During the periods when both engines are cranking properly away I do parts of the pattern. Squares, overheads, all of the eights and the plane handles them really really well. I already know that at some point the inboard engine is going to quit so I stay away from flying it inverted for too long. My next test session is set for Wednesday morning.