External Sling Load Operations

Question 1

External Load operations:

-High density loads:

Answer 1

• Best stability

- Can usually be flown at cruise speeds and in some cases, up to Vne.

Question 2

External Load Operations:

-Low density Loads

Answer 2

• Least stable
  
  • Airspeed is limited by amount of clearance which can be maintained between the load and the underside of the helicopter.
  • Load will tend to trail aft as speed is increased.

Question 3

External load operations:

-Aerodynamic loads

Answer 3

• Unstable until load streamlining occurs
  
  • Inherent dangers from lift capabilities
  • Lift must be eliminated prior to being lifted
  • Airspeed and bank angles will be governed by the reactions of the load.
  • Drogue chutes shall be used to streamline the load.

Question 4

External load operations:

-Two distinct phases of takeoff:

Answer 4

• Lifting the load to a hover
  
  • Slow vertical ascent until sling becomes taut and centered
  • Aircrew coordination to ensure aircraft does not drift from over the load
  • Lifted to appropriate hover height and power check performed
• Takeoff
  
  • Smooth acceleration and takeoff
  • Sufficient power is applied (not to exceed limits)
  • Safe climb altitude = load is unquestionably clear of the highest barrier.

Question 5

3 categories of external loads:

Answer 5

-High density, Low density, Aerodynamic