##### Altitude Vs Gross Weight Limit Graph

Air density and weight is an important factor for a safe autorotation. If air density is low or you have a high density height (High Elevation) then you could expect poor performance while conducting an autorotation landing and hit the ground hard.

To ensure a safe autorotation landing for a gross weight refer to page 18 of the BELL 206L-1 Long Ranger II Handbook. Use the Altitude Vs Gross Weight Limit for Height-Velocity Diagram graphs to complete the following tables. For unit conversion refer to the ERSA.

##### To Find Gross Weight

First calculate the density height, then use the graph to find the maximum gross weight.

- First calculate density height for the elevation to land on using: QNH 993, Elevation 2000ft and OAT +25 degrees.
*(Refer to the beginning of this work booklet to understand how to calculat density height)*. - Using the graph: Move from the density height line horizontally across to the line of the shaded area and drop vertically down to find the gross weight.

- "A" = 4400ft DHT
- 3700lb Gross Weight

##### To Find Chart Density Height

Use the graph to find the maximum safe autorotation density height for landing with a gross weight of 3600lb.

- To find Density Height start with gross weight at the bottom of the graph.
- Move vertically up to the line of the shaded area.
- From this line move horizontally across to find the density height.

- 3600lb Gross Weight
- "B" = 5300ft DHT

##### To Find Elevation Density Height

To find a safe density height for a HLS elevation, Chart verse Elevation, compare the two of them to determine if an autorotation landing is possible.

- First calculate the density height for the elevation using: QNH 1035, Elevation 5500ft and OAT +7 degrees.
- Then calculate the density height off the chart with 3600lb gross weight.
- If the Chart DHT is higher than the calculated DHT, a safe landing is possible.

Yes it is safe for landing.

- Chart 5300ft DHT
- Calculated 5080ft DHT