p-51 black engine

[Mr Greezy]

Just doing the p-51 mission and have noticed a recurring issue. After extended time in the air the engine just quits and dies. I will have been flying along, not getting shot, doing just fine and then the engine on the damage indicator goes black and then I'm SOL. Just wondering if that's a bug. I thought maybe it might be because it overheated or maybe the fuel leaked out. If that's the case, what about some kind of indicator to show you that's happening?

Needless to say, I've been playing the demo nearly every day. I'm a fan.