Our heavyweight helicopter equal in the world does not have
In Rostov started production of the most load-lifting rotary-wing car The Russian holding «Helicopt[...]
CG margin
The distance between the centre of gravity position for neutral stability (the neutral point), and the actual centre of gravity position is known as the CG margin (centre of gravity margin). For an aircraft to be stable, the CG margin must be positive. The CG margin is normally expressed as a dimensionless number, or as a percentage, by dividing the distance by the average wing chord.
COMPRESSIBILITY EFFECTS 309
Manoeuvre margin
Another problem with having the centre of gravity well aft, is that the aircraft begins to respond too strongly to small control movements. It may become very difficult to fly long before it actually becomes unstable.
The limit of rearward centre of gravity position is thus partly controlled by the need to retain acceptable control response. The manoeuvre point is the centre of gravity position at which the smallest elevator movement would result in the lift increasing towards infinity. The distance of the actual centre of gravity from this position is called the manoeuvre margin.
