HeliMark, you're right, in case of complete anti-thrust failure, there is no difference if you have a rotor system or not. But I can assure you that in case of pedal stock, the coenda effect makes it easier and safer to land. . .As I told you all before, if I was flying from helipads to helipads (heliports to heliports)I would prefer a conventionnal tail rotor. But, in dense forest confined aeras or on long line ops, I'd go with the Notar. . . If your tail boom tip goes one feet under water at 100% rpm, would you be able to take off without any damage? That is what I mean bye safety during ops.