The Height - Velocity diagram enable to establish if, in the event of a single engine failure during takeoff, landing or other operation near the surface, a combination of airspeed and height above ground exists from which a safe single engine landing on a smooth, level and hard surface cannot be assured (dangerous zone).
The height - Velocity diagram is split in two charts:
Chart A shows the weight values, together with outside air temperature and altitude, at/below which the dangerous zone does not exist.
For heavier weights refer to Chart B.
Chart B defines the combinations of height and airspeed to avoid for safe operations.
| NOTE |
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The height - velocity diagram does not define the conditions which assure continued flight following an engine failure nor the conditions from which a safe power off landing can be made. |
The Height-Velocity diagram defines, in the event of a single engine failure during take off, landing or other operation near the surface, a combination of airspeed and height above ground from which a safe single engine landing on a smooth, level and hard surface cannot be assured.
| CAUTION |
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| Prior to the determination of the H-V envelope, the CATEGORY B weight should be defined for the ambient conditions. See Flight Planning in Section 2 for use of the CAT B W.A.T. and H-V envelope chart |
Height Velocity Diagram ........................................................See Figure 1-4
