Hi RichPa.
There is some good stuff above, including the "see how it flies" reference. But don't be distracted by the jets vs. turboprop argument at this stage.
Vmc depends on slip, among other things. The way a pilot adjusts slip in straight flight is by adjusting bank angle while preventing yaw with rudder. The ball will move while doing this. But if you adjust bank for a turn while simultaneously moving the rudder to keep slip constant (so the ball does not move), Vmc won't change much. This means that, for small angles of bank, pilots can turn in either direction without losing control. The important thing is to keep the ball in the correct place!
When books talk about minimising Vmc by maintaining e.g. 5* angle of bank, they are talking about straight flight. So the trick is to look at the ball when in that state, and keep the ball precisely in that position from then on. Turning will cost climb performance, but you won't lose directional control if you control value of slip for a given airspeed.
Last edited by Oktas8; 5th Feb 2013 at 19:52.