My Magnum .52XLS is giving me a problem with mid range transition. It will idle all day long and transition right to full throttle, however when I'm flying if I stay at about 1/8 to just under 1/2 throttle for more then 10-15 seconds it's a toss up between dead stick, sputter and run or transition like it should. If the engine were on a sport plane I don't think I'd even notice the problem... for 3D flight the mid range SUCKS!!!!! It has no air leaks. So far I've tried lean/rich on both low and high, moved the tank position up and down and O.S. A3, #8, McCoy-59's and one fox plug... miracle plug I think. I'm running powermaster 15% swing an APC 12.25x3.75 somewhere around 12,500 to 13,000 depending on the weather. nothing so far has cured the problem for good, some day's I can make 1 or 2 flight's without a dead stick other day's it won't make 1 full flight. any ideas?? BTW if I stay out of the mid range and just go from idle to around half throttle/ full throttle it will run the tank dry... I even took it to 400 or so ft and glided it down at idle... dam thing transitioned right out several times... do one harrier for to long at 1/8 or so throttle ... you better be ready for a dead stick.


John