I probably have over 100 flights on my C-310 with Os .46. I had my first engine flame out on the most recent flight with it a few weeks ago. I was at an estimated altitude of 250 or 300 feet, maybe 350. I was headed downwind at about mid field when it quit. I continued downwind while pretty much holding altitude. It was not my plan or intent but at the end of my downwind leg while still at about the same altitude as where the engine failed The plane flipped over on its back and headed straight down, basically a split "S" I pulled out of the dive with the good engine at full power and lots of air speed. From there it still wasn't pretty but I was headed toward the runway more or less. I struggled to find the right amount of rudder and aileron to keep it level but I never fully lost directional control the rest of the way. I managed to hit the runway and made a pretty good landing under the circumstances. I don't recall if I found a reason for the flame out or not. I run Master Airscrew (Black) 11x5 props on my plane for what its worth. I will probably get it out in the next week or so and fly again and see how the engine runs. It flew better on one engine than I ever thought it would but it would not be good to have one quit on upwind leg after takeoff and low altitude, low airspeed. I would probably do a semi Split s and land down wind if that ever happened. That is assuming that I had enough altitude to do that. I realize I was lucky, with where it quit and how high I was. Up until that flight the engines have always been perfect, never a sputter or cough. I typically start the right engine first, set the needle ( never fully leaned out), always a few clicks rich and then kill it. Then start the left engine, set needle and then restart the right engine. I do this so I can hear both engines without the noise of the other engine. I start them in that order so I am out of the way of the running engine when starting the right engine for the second time.