Refer to figure.
What is the Never Exceed Speed at 4000 feet pressure altitude, +10°C outside air temperature and a helicopter mass of 2300 lbs?
Refer to figure.
The Never Exceed Speed (VNE) for a helicopter varies based on different factors such as altitude, outside air temperature, and mass. If the helicopter is flown faster than the VNE extracted from the table, structural integrity and safety cannot be ensured.
To determine the VNE proceed with the following manner:
- Enter with pressure altitude 4000 ft from the left.
- Enter with OAT +10°C from the top.
- The intersection gives VNE 126 KIAS, but it is valid only for Take-off Gross Mass (TOGM) 2200 lbs and below.
- For TOGM 2300 lb (over 2200 lb), subtract 10 KIAS: 126 KIAS - 10 kt = 116 KIAS.
NOTE:
KIAS: Knots Indicated Airspeed
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