Hi ger,
I used to have JPX engines back in 1984, and found that in the winter time (when I weight about 180lbs) I could maintain altitude on one engine. The cold dense air gave me good lift, and good power. In the summer, no way I could maintain altitude (unless you hit a thermal). And as far as turning, you are suppose to turn towards the good engine, to prevent wing stall. Well I tried this, and it does not want to turn, with the engine at full power. I found that if you need to turn, cut the engine back to idle, make your turn, then apply full power, and at least you will have a very long glide (and time to make a decision), with one engine at full power. I use to play with one engine off, over a very large field to get to know how the plane reacts. I had two surprises earlier, where one engine quit on me, and was lucky I was high enough to make decisions on how and where to land. I always look for open fields when I fly now, because you just never know. It is unlikely both engines will quit at the same time, so it's nice knowing that. Daffy